Percent Mortality Research Articles

Phytomediated stress modulates antioxidant status, induces overexpression of CYP6M2, Hsp70, α-esterase, and suppresses the ABC transporter in Anopheles gambiae (sensu stricto) exposed to Ocimum tenuiflorum extracts.

The incorporation of phytoactive compounds in the management of malarial vectors holds promise for the development of innovative and efficient alternatives. Nevertheless, the molecular and physiological responses that these bioactive substances induce remain underexplored. This present study investigated the toxicity of different concentrations of aqueous and methanol extracts of Ocimum tenuiflorum against larvae of Anopheles gambiae (sensu stricto) and unraveled the possible underlying molecular pathways responsible for the observed physiological effects. FTIR and GCMS analyses of phytoactive compounds in aqueous and methanol crude extracts of O. tenuiflorum showed the presence of OH stretching vibration, C = C stretching modes of aromatics and methylene rocking vibration; ring deformation mode with high levels of trans-β-ocimene, 3,7-dimethyl-1,3,6-octatriene in aqueous extract and 4-methoxy-benzaldehyde, 1,3,5-trimethyl-cyclohexane and o-cymene in methanol extract. The percentage mortality upon exposure to methanol and aqueous extracts of O. tenuiflorum were 21.1% and 26.1% at 24 h, 27.8% and 36.1% at 48 h and 36.1% and 45% at 72 h respectively. Using reverse transcription quantitative polymerase chain reaction (RT-qPCR), down-regulation of ABC transporter, overexpression of CYP6M2, Hsp70, and α-esterase, coupled with significantly increased levels of SOD, CAT, and GSH, were observed in An. gambiae (s.s.) exposed to aqueous and methanol extracts of O. tenuiflorum as compared to the control. Findings from this study have significant implications for our understanding of how An. gambiae (s.s.) larvae detoxify phytoactive compounds.

Evaluating Mosquito Biocontrol Effectiveness by Isolating and Characterizing Some Fungi Against Culex Pipiens and Anopheles Stephensi in Sothern Part of Iraq

Objectives: Isolation Aspergillus tamarii, Cladosporium herbarum, and Verticillium lecanii fungi from naturally infected Culex pipiens and Anopheles stephensi insects were morphologically and molecularly identified. Methods: In this study, populations of mosquitoes were cultured and examined to determine fungal infection and evaluated as potential agents against C. pipiens and A. stephensi. Results: A variety of fungal isolates demonstrated differing degrees of pathogenicity 24 hours after treatment against C. pipiens and A. stephensi eggs, four-instar mosquito larvae, and adults. and as a biological control, it was found that the fungal suspension of each of the used fungi affected the life roles of the two mosquitoes. as it was more than the fungus suspension A. tamarii, Cl. herbarum on V. lecanii. The highest percentage of eggs mortality were (36.72, 48.97) %, (29.14, 42.25) %, and (24.45, 35.70) % of C. pipiens and A. stephensi when using the highest concentration of 1*105 spore/ml, 3*105 spore/ml and 2*105 spore/ml of fungicide A. tamarii, C. herbarum, V.lecanii and respectively after 24 hours. The highest mortality rate was for the fourth larval stages, and the mosquito A. stephensi is more sensitive to type C. pipiens infection., as, in order (75.6, 67.19, 56.8) %, (74.18, 59.81, 50) %, and (65, 52,42.71) %. Conclusions: Results highlight the significance of a mosquito's natural fungal opponent. All isolates had an impact on adults and larvae, although they were less successful against eggs. Both have the potential to develop, particularly against the larvae of the primary arbovirus, malaria, and lymphatic filariasis vectors, A. stephensi, and C. pipiens.

The effect of chemically modified wood particles on the termite durability of sandwich particleboard from Cotylelobium melanoxylon and Gigantochloa pruriens

The tropical region of Indonesia is a preferred habitat for termites. High humidity is very supportive of the growth of these organisms. The impact resulting from these conditions is the vulnerability to the durability of products made from lignocellulosic because this material is the main feed source for termites. Chemical modification treatment is needed in the manufacturing process to increase product durability. This study aims to analyze the resistance of sandwich particleboard to attack by subterranean termites due to chemical modification of the particles. The sample used in this study was chemically modified particleboard made of raru wood (Cotylelobium melanoxylon) particles and belangke bamboo (Gigantochloa pruriens) strand. Then the samples were fed to subterranean termites (Coptotermes curvignathus) regarding SNI 01.7202-2006. Parameters observed included the percentage of termite weight loss and mortality. The results showed that sandwich particleboard, which was dominated by 80% bamboo and 20% raru wood with acid and alkaline treatment, was not resistant to subterranean termite attack. The weight loss value produced in this study ranged from 11.97 - 15.83%, included in the durable class IV classification. The higher concentration of acetic acid in particle immersion resulted in a decrease in the value of the board’s weight loss, and the opposite condition was experienced by panels with particle immersion treatment using sodium hydroxide (NaOH).

Mendelian Randomization and Transcriptomic Analysis Reveal the Protective Role of NKT Cells in Sepsis.

Sepsis is a life-threatening clinical syndrome caused by dysregulated host response to infection. The mechanism underlying sepsis-induced immune dysfunction remains poorly understood. Natural killer T (NKT) cells are cytotoxic lymphocytes that bridge the innate and adaptive immune systems, the role of NKT cells in sepsis is not entirely understood, and NKT cell cluster differences in sepsis remain unexplored. Mendelian randomization (MR) analyses were first conducted to investigate the causal relationship between side scatter area (SSC-A) on NKT cells and 28-day mortality of septic patients. A prospective and observational study was conducted to validate the relationship between the percentage of NKT cells and 28-day mortality of sepsis. Then, the single-cell RNA sequencing (scRNA-seq) data of peripheral blood mononuclear cells (PBMCs) from healthy controls and septic patients were profiled. MR analyses first revealed the protective roles of NKT cells in the 28-day mortality of sepsis. Then, 115 septic patients were enrolled. NKT percentage was significantly higher in survivors (n = 84) compared to non-survivors (n = 31) (%, 5.00 ± 3.46 vs 2.18 ± 1.93, P < 0.0001). Patients with lower levels of NKT cells exhibited a significantly increased risk of 28-day mortality. According to scRNA-seq analysis, NKT cell clusters exhibited multiple distinctive characteristics, including a distinguishing cluster defined as FOS+NKT cells, which showed a significant decrease in sepsis. Pseudo-time analysis showed that FOS+NKT cells were characterized by upregulated expression of crucial functional genes such as GZMA and CCL4. CellChat revealed that interactions between FOS+NKT cells and adaptive immune cells including B cells and T cells were decreased in sepsis compared to healthy controls. Our findings indicate that NKT cells may protect against sepsis, and their percentage can predict 28-day mortality. Additionally, we discovered a unique FOS+NKT subtype crucial in sepsis immune response, offering novel insights into its immunopathogenesis.

Hot-pressing effect on the termite durability of sandwich particleboards from Styrax sumatrana and Gigantochloa pruriens

As a country known for its mega-biodiversity, Indonesia is included in the vulnerable area for wood-destroying organisms, especially termites. Particleboard, as a composite product made of lignocellulosic material, is a product vulnerable to termite attack. One factor that determines the quality of particleboard is the hot-pressing process. Temperature and pressing time are the parameters that play a role in the hot-pressing process. This study aims to analyze the effect of temperature and pressing time on the resistance of boards due to attack by subterranean termites (Coptotermes curvignathus Holmgren). Then the samples were fed to subterranean termites regarding SNI 01.7202-2006. Parameters observed included the percentage of termite weight loss and mortality. The results showed that Higher compressive temperatures lead to relatively better resistance, as lower weight loss values indicate. The boards produced from the hot-pressing process at 160°C for 10 minutes had the lowest weight loss value due to termite attack.

Marching towards bioeconomy: Larvicidal effect of three indigenous plant extracts from Sri Lanka—Garcinia quaesita, Garcinia zeylanica, and Coleus hadiensis on dengue vector Aedes aegypti

AbstractBioeconomy would be a beneficial solution for funding through the rational use of finances and human resources in order to achieve better productivity and fruitfulness of mosquito control programs. Synthetic insecticides are widely used to repress mosquitoes. However, it instigates problems such as insecticide resistance among mosquitoes such as developing resistance, bio‐accumulation, and ecosystem destabilization. Natural plant‐based products are a healthy alternative to use as mosquito larvicides. The country has to spend a considerable cost for buying synthetic insecticides too. Therefore, the present study was undertaken to evaluate larvicidal efficacy of Garcinia zeylanica, Garcinia quaesita, and Coleus hadiensis against Aedes aegypti mosquito larvae. Fresh leaves of plants were collected, and the aqueous crude extract was prepared. Phytochemicals were extracted using refluxing technique. A concentration series of crude extract of leaves were prepared separately from 20 to 100 mg/L. Batches of each containing 100 third instar larvae of Ae. aegypti were used for larval bioassays. Ae. aegypti mosquito larvae were evaluated in accordance with the guidelines of World Health Organization. The experimental setup was repeated four times at each concentration. Probit analysis was used to evaluate the relationship of mortality with the concentration of aqueous crude extract. The G. zeylanica and G. quaesita leaf extracts showed a dose‐dependent effect against Ae. aegypti larvae after the 24 and 48 h exposure period. Interestingly, C. hadiensis did not show any dose‐dependent effect against A. aegypti mosquito larvae. The percentage mortality rates have shown a significant variance among different concentrations (P = 0.000). The recorded LC50 and LC90 for aqueous crude extract of G. zeylanica were 27.167 and 52.861 g/L, respectively, and LC50 and LC90 for aqueous crude extract of G. quaesita were 36.841 and 76.036 g/L, respectively, after 24 h of exposure period. The G. zeylanica and G. quaesita plant's high larvicidal activity is supported by the presence of phytochemicals such as saponins, steroids, flavonoids, and phenol, which showed combination effects in terms of larvicidal action to mosquito larvae. Hence, there is a potential of G. zeylanica and G. quaesita aqueous leaf extracts as a key source for the development of an environment‐friendly plant‐based larvicide against Ae. aegypti. Hence, this warrants vector control entities to re‐think “biological wealth for economic prosperity” with environmentally friendly country‐wide control approaches for medically important disease vectors.

Evaluation of the Efficacy of Several Plant-Based Insecticides and Aqueous Nano-Silica Formulations Against the Rust-Red Flour Tribolium castaneum (Herbst.) Under Laboratory Conditions

Laboratory studies were conducted to evaluate the effects of plant-based insecticides such as Tandexir and Balizin, hydrophilic nanosilica compounds in addition to biopesticides synergistic with nanocompounds to estimate the effects of rust-red flour beetle Tribolium castaneum the mortality percentage Efficacy was evaluated. The results showed the effectiveness of tundexir insecticide with a statistically significant difference of up to 75% in obtaining higher mortality rate, compared to Balizin which obtained a rate of 63.61%. Furthermore, the results showed that 4 ml liter-1 dose of Tandexir was more effective than Balizin with a statistical difference after 5 days of treatment, resulting in mortality rates of 93.33% and 83.33%, respectively. For both formulations, a dose of 4 ml litre-1 was the most effective in obtaining mortality, and 100% was recorded after 7 days of treatment The results of the efficacy study of the nanosilica formulations showed that the 0.4 g liter-1 dose showed high mortality at 100% after 7 days of treatment, when mortality time was obtained comparing dosages of 0.2 and 0.3 g liter-1 in at the same time 76 .66% and 83.33%. The results showed that using plant-based insecticides at a concentration of 2 ml per liter of water, together with 0.2 grams per liter of a water-friendly nanosilica compound, worked really well together. Tundexir exhibited superior performance in achieving higher mortality rates, reaching 100% after 7 days of treatment, with a mortality rate of 84.16%, compared to Balizin, which achieved a mortality rate of 96.66% at a concentration of 77.50%.

Antimicrobial Activity, Cytotoxicity, and Qualitative Phytochemistry of Leaf, stem bark, and root bark extracts from Prunus africana (Hook. F.) Kalkman

The rise of resistant strains poses a significant public health risk, particularly, in sub-Saharan Africa, where over 50% of global infectious disease-associated deaths occur, highlighting the urgent need for novel, safe, affordable, and accessible antimicrobials. Accordingly, we investigated the antimicrobial activity, cytotoxicity, and qualitative phytochemistry of the aqueous, hydroethanolic, and acetonic leaf, stem bark, and root bark extracts of Prunus africana (Hook. F.) Kalkman, based on its ethnomedicinal information. The results showed the aqueous root bark and aqueous/acetonic stem bark extracts demonstrated significant (p&lt;0.05) antimicrobial efficacy against S. aureus at 800 µg/ml, outperforming other extracts and the reference antibiotic. Growth inhibition zones for most extracts on S. aureus showed a concentration-dependent increase, though not significantly (p&gt;0.05) different. The acetonic root bark extract, particularly at 800 µg/ml, exhibited superior inhibitory effects against B. cereus compared to other extracts (p&lt;0.05), although the positive control antibiotic significantly (p&lt;0.05) outperformed all plant extracts. Notably, none of the studied extracts affected P. aeruginosa and E. coli, while varying effects were observed against C. albicans. Further we observed that the hydroethanolic and aqueous stem bark extracts' exceptionally low Minimum Inhibitory and Bactericidal Concentrations (MICs and MBCs) against S. aureus (3.125 µg/ml). Conversely, the acetonic leaf extract showed higher MIC and MBC values against S. aureus (100 µg/ml). Cytotoxicity assessments using brine shrimp nauplii revealed the percentage mortalities caused by Vincristine and aqueous root/stem bark extracts at 1000 µg/ml, were significantly (p&lt;0.05) higher than those caused by other extracts (Median lethal concentrations (LC50) of 513 µg/ml to 24327.82 µg/ml). Qualitative phytochemistry identified alkaloids in root bark and stem bark extracts, flavonoids, phenols, quinones, steroids, and terpenoids across all samples, with saponins in acetonic root bark and all three leaf extracts, and glycosides in acetonic stem bark, hydroethanolic root bark, and acetonic leaf extracts. These findings highlight the diverse antimicrobial and cytotoxic properties of P. africana extracts, suggesting potential therapeutic applications and emphasise the need for further exploration.

PENGARUH PENAMBAHAN JUMLAH BERAT BATU ZEOLIT YANG BERBEDA PADA TRANSPORTASI BENIH IKAN NILA (OREOCHROMIS NILOTICUS)

This research aims to determine the effect of adding different weights of zeolite stone on the survival rate of tilapia (Oreocrhomis niloticus) seeds during the transportation process carried out at BBI Batu Kumbung, Lingsar District, West Lombok Regency. The method used in this research is an experimental method. The data analysis used was Analytical Analysis (ANASRA) at a real level of 5% and 1% to determine the percentage of mortality of the object under study. The results of this research were the use of zeolite stones with different weights for transporting tilapia (Oreocrhomis niloticus) seeds. The results of observations in treatment X0 using zeolite stone weighing 10 g mean percentage of life 74.66%, X1 treatment uses zeolite stone weighing 20 grams with an average survival percentage of 77.33%, X2 treatment uses zeolite stone weighing 30 g with an average survival percentage of 82.66%, and treatment X3 using zeolite stone weighing 40 g with an average survival percentage of 88.66%. ased on the Variety Scan analysis, it shows where F Calculated &lt; F Table 5%, so it can be concluded that H0 is accepted or H1 is rejected, meaning that the difference in the weight of the zeolite stone does not have a significant effect on the survival rate of tilapia (Oreochromis Niloticus)

Acaricidal Efficacy of Thirty-Five Egyptian Plants Against the Camel Tick, Hyalomma Dromedarii.

Alternative and affordable tick control strategies are crucial to control and prevent tick bites and tick-borne diseases. In this study, we evaluated the acaricidal efficacy of 35 aqueous plant extracts (17%) against the camel tick, Hyalomma dromedarii. The phytochemical profile indicated the presence of various secondary substances. Plants were classified into three groups according to their mortality percentage 15days post-treatment with 17%. This highly effective group (91%-95%) comprised Ocimum basilicum, Mespilus germanica, and Viola alpine followed by Carum carvi, Cucurbita pepo (peel), and Peganum harmala. A moderately effective group (80%-90%) included Acacia nilotica, Apium graveolens, Capsicum annuum, Ceratonia siliqua, Cucurbita pepo (seeds), Equisetum arvense, Eruca sativa, Ginkgobiloba, Plantagopsyllium, Phyllanthusemblica, Punica granatum, and Ziziphus spinachristi. The 20 remaining plants were assigned to the less effective group (< 80%). Viscum album (58.3%), which was the least effectivereference plant. The high potency of six plant extracts as acaricides may be attributed to the high content of active principles, e.g., phenols, flavonoids, and tannins. All of these highly effective plants are recommended for use as an acaricide, in case offacing acaricidal resistance or limited options for tick control.

P040 Obesity and rheumatoid arthritis among individuals with low education

Abstract Background/Aims Poor education is connected to many diseases including cardiovascular diseases (CVD) and some CVD-related risk factors such as obesity. However, precisely how this relationship occurs is unknown. In this research we will be exploring how the connection between obesity and overall mortality is modified by rheumatoid arthritis (RA). Methods Our study was conducted on participants that were aged 20 years or older living in the United States with a education level of only some high school. We assessed RA status by using the arthritis question in the National Health and Nutrition Examination Survey (NHANES) survey conducted by the National Center for Health Statistics (NCHS) for the years of 1999 to 2010 with mortality follow-up to December 2019. We determined obesity by calculating BMI and setting a cutpoint at 30 kg/m2. Education level was determined through self-reported data. Chronic Kidney Disease was determined using the Cockcroft-Gault equation. Prospective analysis was performed using complex samples Cox regression with adjustment for known confounders to determine the relationship of obesity and mortality, and if RA has an overall relationship in those with low education. Results Among individuals with low education and RA, percent mortality was 32.3% among males and 32.6% among females with mean follow-up of 9.3 years. For overall mortality, the age and sex-adjusted hazard ratio (HR) for obesity was 1.18 (95% confidence interval [CI], 1.05-1.34 p = 0.01). The adjusted HR was elevated, 1.56 (CI 1.06-2.32, p = 0.03), among people with obesity who also had RA but close to 1.0 (1.21 CI 0.99-1.47, p = 0.06) among individuals with obesity who had no RA, after adjusting for medical (chronic obstructive pulmonary disease, history of cancer, cardiovascular disease, chronic kidney disease, and diabetes) and demographic risk factors (poverty-income-ratio, age, military service, citizenship, and gender). Conclusion We found that among individuals with low education, not only does obesity lead to 18% higher overall mortality but also RA occurrence impacts the relationship between obesity and overall mortality even after controlling for potential confounders. Education and health literacy are especially important in the preventing and treating RA especially in those who have obesity. With cardiovascular disease having the highest rate of mortality, risk factors for CVD such as obesity must be prevented. Disclosure J. Khubchandani: None. S. Banerjee: None.

P016 Cardiovascular disease and rheumatoid arthritis among people with a history of cancer

Abstract Background/Aims Cardiovascular disease (CVD) is connected to many comorbidities and vascular diseases. Cancer also has certain inflammatory impact on the physiological mechanisms. However, the precise connection between these variables are unknown. In this research, we determined if there was an association between cardiovascular disease and overall mortality and how this connection may be modified by rheumatoid arthritis. Methods The National Health and Nutrition Examination Survey (NHANES) survey was conducted by the National Center for Health Statistics (NCHS) for the six cycles or years of 1999 to 2010 with mortality follow-up through December 31, 2019. This data is published biennially. Our study was conducted on participants with a history of cancer that were aged 40 years or older living in the United States with cardiovascular disease. CVD was determined by a history of stroke, congestive heart failure, coronary heart disease, and myocardial infarction. History of cancer was considered positive if the respondent answered “yes” to the question “Ever told you had cancer or malignancy”. We assessed RA status by using the arthritis question. We determined diabetes by healthcare worker diagnosed recall of the diagnosis of the disease. In this prospective analysis that we performed Complex Samples Cox regression with adjustment for known confounders to determine the relationship of chronic kidney disease and mortality, and if rheumatoid arthritis has an overall relationship in those living with diabetes. Results Among individuals living with cancer and rheumatoid arthritis, percent mortality for males was 58.2% and for females was 61.9%. For overall mortality, crude hazard ratio (HR) for diabetes was 2.13 (95% confidence interval [CI], 1.39-3.25 p &amp;lt; 0.001). The adjusted HR was elevated, 1.86 (CI 1.17-2.96, p = 0.01), among people with cardiovascular disease who also had rheumatoid arthritis but close to 1.0 (1.36 CI 1.09-1.70, p = 0.01) among individuals with cardiovascular disease who had no rheumatoid arthritis, after adjusting for medical (cardiovascular disease, asthma, chronic kidney disease, chronic obstructive pulmonary disease, and obesity) and demographic risk factors (gender and age). Similar patterns do not exist in the general population. Conclusion Among individuals has had a history of cancer, not only does cardiovascular disease lead to two times higher overall mortality but also rheumatoid arthritis occurrence impacts the relationship between cardiovascular disease and overall mortality even after controlling for potential medical and demographic confounders. Cardiovascular is the primary cause of death in many high- and middle-income countries in the world. More prevention efforts need to be made in order to prevent CVD and treat rheumatoid arthritis. Disclosure J. Khubchandani: None. S. Banerjee: None. C. Onukogu: None. R. Gonzales-Lagos: None.

Rhino-orbital cerebral mucormycosis : Case report and its approach at Central Military Hospital of Mexico

Mucormycosis is a disease with a high percentage of mortality. This opportunistic disease is caused by pathogens of the Zygomicota family of the order Mucorales, which affect considerably, mainly immunocompromised patients. We present the case of a patient approached at the Central Military Hospital of Mexico, diagnosed with rhino-orbito-cerebral mucormycosis, with histopathological report of non-septated hyaline hyphae of 90º, referring to the aforementioned diagnosis. A multidisciplinary approach to the pathology was carried out with diagnosis, timely medical and surgical treatment, achieving a favorable evolution and prognosis in a condition whose outcome is usually fatal.

Selection and molecular identification of specific entomopathogens in South Sulawesi and the pathogenicity to fall armyworm (Spodoptera frugiperda JE. Smith) (Lepidoptera: Noctuidae)

Abstract Background Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), known as fall armyworm (FAW), is a wide-scale invasion pest that resulted in crop yield loss and certainly caused critical economic damage. Therefore, several control strategies such as the application of entomopathogen agent to control the population can be applied. The study aimed to designate and identify the candidate entomopathogens fungi (EPF) from South Sulawesi to control FAW. Results The research was conducted in several stages: field exploration, isolation, purification, bioassay, and morphological or genetical identification of selected fungi. The identification found out that: Sarocladium strictum, Talaromyces purpureogenus, and Aspergillus terreus had significant mortality percentages and incubation time in killing FAW. The highest mortality percentage was obtained in the case of the A. terreus (MLN8) isolate with an average mortality of 83.33% (2 days after incubation); A. terreus (4b) with an average mortality of 76.67% (4 days after incubation); both S. strictum (3) and T. purpureogenus (2B) required 3 and 5 days to control FAW, respectively, with 73% mortality percentage. Conclusion Ultimately, the exploration of several areas in South Sulawesi discovered potential EPF to suppress the FAW population biologically. Therefore, the identification of those EPFs contributes to FAW strategies control and the development of biopesticides.

Phytochemical screening and insecticidal activities of some medicinal plants against the maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae)

This study emphasizes the phytochemical study of some locally available botanicals against maize weevils. Nine plant parts were collected from six plant species. The test plant powder (200 g) was suspended sequentially in 600 ml of petroleum ether, chloroform, acetone, methanol, and distilled water for 72 h with frequent agitation. Different concentrations of the crude extracts were applied to maize seeds at rates of 10 ml, 15 ml and 20 ml per 100 g. All treatments with different extracts at different rates of application showed significant differences (p < 0.05) in the cumulative mean percentage mortality of the maize weevil. The seed extract of Maesa lanceolata and Croton macrostachyus and the leaf extract of Clausena anisata showed cumulative percent mortality ranged 95.32–98.02% in 28 days after treatment application. There was no significant difference (p > 0.05) among all treatments for the prevention of F1 progeny emergence. In all extracts, Clausena anisata showed 100% inhibition of F1 progeny emergence. All treatments significantly reduced seed weight loss and damage. The treated maize seeds were germinated with an acceptable germination quality. In conclusion, an increased dosage of the extract resulted in significant mortality in maize weevils. The seed extracts of Maesa lanceolata and Croton macrostachyus and Clausena anisata leaf extract were observed to be the most promising botanical in protecting stored maize against maize weevil.

Enhance the physicochemical properties of the citronella oil -SLNPs to improve the insecticidal activity against Spodoptera littoralis (Boisd) (Lep. Nactuidae)

The Nano-formulation of citronella essential oil (Cymbopogon nardus (L.) and their mixtures of three adjuvants (Provecta®, Top film®, and PEG600-dioleate) were studied to enhance physico-chemical properties of the Nano-formulation and improve the insecticidal effect against Spodoptera littoralis (Boisd). Characterisation of physicochemical properties of Nano-formulation was studied by calculating droplet size, polydispersity index (PDI), and Zeta-potential parameters. The results showed that the Solid Lipid Nanoparticles (SLNs) mixtures of three adjuvant mixtures had more toxic activity and stability than the Nano-formulation alone. Before storage the acidity, alkalinity (pH), and viscosity exhibited an acidic pH value in the range (4.11–5.34), whereas after three months of storage was recorded high pH, a shift in the pH on storage can indicate the instability of active substances or product under semi field-laboratory conditions. Nano-formulation of the citronella oil mixed with the three adjuvants increased the mortality percentage of S. littoralis larvae.

Mortality from cerebral stroke in the State of Pernambuco, Brazil: an ecological study

Introduction: cerebrovascular accident (CVA) is the second leading cause of death globally, characterized by cerebrovascular events due to dysfunctions in the cerebral blood supply. It can be ischemic or hemorrhagic and has high morbidity and mortality rates. In Brazil, it is the main cause of death, disabling many over 50 years of age and leading to around 40% of early retirements. Despite advances in initial treatment, mortality rates remain high, indicating flaws in prevention and treatment strategies. Therefore, the World Health Organization (WHO) emphasizes the need for immediate implementation of preventive and treatment measures for this condition. Objective: to evaluate the trend in the mortality coefficient and proportional mortality from stroke in the population of Pernambuco, from 2000 to 2021. Methods: This is an ecological time series study with data from the population of the state of Pernambuco, located in northeast region of Brazil, from 2000 to 2021. The eligibility criteria were deaths with a stroke occurring in the state of Pernambuco. Information on mortality, population estimates and number of deaths by sex and age group were extracted from the database of the Department of Informatics of the Unified Health System (DATASUS). For statistical analysis, it was calculated the mortality coefficient, proportional mortality, mean, standard deviation, skewness and kurtosis. The temporal trend of stroke was assessed by jointpoint regression. Results: Between 2000 and 2021, there were 39,410 deaths from stroke. Around 49.0% were male and 51.0% female. The female sex had an average of 913.45 in the number of deaths, being quantitatively higher than the average identified for the male sex of 877.04 deaths. The years with the highest number of deaths were 2006, 2007 and 2008, while 2018 had the lowest number. There was a progressive increase in the number of deaths from stroke from 2018 to 2021. There was a decline in the average annual percentage variation in the mortality rate for stroke in all groups studied, in addition to a drop in the average annual percentage of proportional mortality for stroke in the entire population. Throughout the period, there was a decline in the average annual percentage of proportional mortality from stroke in the entire population studied. Conclusion: In the period from 2000 to 2021 there was a greater number of deaths due to stroke in women in contrast to men in the population of Pernambuco, Brazil. Furthermore, there was a downward trend in stroke rates in both the mortality rate and proportional mortality. In the period from 2018 to 2021 there was a progressive increase in the mortality rate and proportional mortality from stroke.

Induction of Resistance to Larvae Crocidolomia pavonana F. (Lepidoptera: Crambidae) using Rhizobacteria to the Cabbage

Crocidolomia pavonana is a significant pest on cabbage that reduces the quality and quantity of cabbage. Utilizing microorganisms such as rhizobacteria is an alternative environmentally friendly control that can potentially suppress the development of this pest. The study aimed to obtain rhizobacteria isolates capable of colonizing cabbage tissue and inducing plant resistance to C. pavonana larvae. The research was conducted at the Biological Control Laboratory and Greenhouse, Faculty of Agriculture, Universitas Andalas, Padang. The study used a Completely Randomized Design (CRD) with ten treatments and five replications. The treatment consisted of rhizobacteria isolates, including Bacillus thuringiensis, Bacillus subtilis, Serratia marcescens, Stenotrophomonas maltophilia, as well as a negative control (aquadest sterile) and a positive control (Cypermethrin insecticide). The test was carried out by soaking the seeds in a suspension containing rhizobacteria with a population density of 10⁸ cells/ml. The variables observed were larval mortality, pupa and imago formation percentage, and increased salicylic acid production. The data were analyzed using variance and continued with the LSD further test at the 5% level. The results showed that all rhizobacteria isolates colonized into cabbage plant tissue could kill C. pavonana larvae and inhibit these insects' biological development. B. thuringiensis KJKB7.3 showed better results with the highest mortality value (62.67%). Soaking cabbage seeds with rhizobacteria can increase the content of salicylic acid. Based on this research, the rhizobacteria used in the research have the potential to be developed as biological agents to control C. pavonana.

Susceptibility of Delta Select and Delta Control Channel Catfish lines to experimental Edwardsiella ictaluri and Edwardsiella piscicida infection

AbstractObjectiveThe Delta Select line of Channel Catfish Ictalurus punctatus was established in 2006 and has undergone five generations of genetic selection, specifically targeting increased growth rate and carcass yield, and was released to U.S. catfish farmers in 2020. While improvements in growth rate and carcass yield have been confirmed, performance for other important production traits has yet to be evaluated. Infectious disease, particularly bacterial infections caused by Edwardsiella spp., cause significant economic losses to catfish producers in the southeastern United States. Given the economic consequences of these bacterial pathogens, experimental infectivity trials were conducted comparing susceptibility to Edwardsiella spp. between the Delta Select line and a randomly bred line of Channel Catfish originating from the same base population (Delta Control line).MethodsTwenty‐six full‐sib families from each line were used in infectivity trials consisting of a high and a low dose of E. ictaluri (immersion challenge: high dose = 1.6 × 107 CFU/mL, low dose = 8.0 × 106 CFU/mL) and E. piscicida (intracoelomic challenge: high dose = 6.3 × 105 CFU/fish, low dose = 1.9 × 105 CFU/fish).ResultThe high challenge dose resulted in the highest mortality for both pathogens (p &lt; 0.001), regardless of selection line. There was no significant difference in cumulative percent mortality between the Delta Select and Delta Control lines following the E. ictaluri challenge at either dose (p = 0.55). Delta Selects had reduced mortality (p &lt; 0.001) in response to E. piscicida challenge compared with the Delta Controls, regardless of dose.ConclusionThese results indicate that selection for increased growth rate and carcass yield in the Delta Select Channel Catfish line did not negatively impact resistance to E. ictaluri while potentially improving resistance to E. piscicida.

Purification of andibenin and a chromanone analogue from rhizospheric Aspergillus flavus and soil-borne Penicillium notatum exhibiting cytotoxic and antibacterial properties

ABSTRACT The discovery of bioactive compounds from fungal natural sources holds immense potential for the development of novel therapeutics. The present study investigates the extracts of soil-borne Penicillium notatum and rhizosphere-inhabiting Aspergillus flavus for their antibacterial, antifungal, and cytotoxic potential. Additionally, two compounds were purified using chromatographic and spectroscopic techniques. The results demonstrated that the ethyl acetate fraction of A. flavus exhibited prominent cytotoxic activity against Artemia salina, whereas the ethyl acetate fraction of P. notatum displayed promising antibacterial potential. At dose concentrations of 10, 100, and 1000 µg mL−1, the ethyl acetate fraction of A. flavus showed mortality percentages of 7.6%, 66.4%, and 90%, respectively. The ethyl acetate fraction of P. notatum extract exhibited significant antibacterial activity, forming inhibition zones measuring 41, 38, 34, 34, and 30 mm against B. subtilis, S. flexneri, E. coli, K. pneumoniae, and S. aureus, respectively, at 1000 µg mL−1. At this concentration, inhibition zones of 28, 27, and 15 mm were recorded for P. vulgaris, S. typhi, and X. oryzae. Using bioassay-guided approach, one compound each was purified from the fungal extracts. The initial purification involved mass spectroscopic analysis, followed by structural elucidation using 500 MHz nuclear magnetic resonance (NMR) spectroscopy. Compound 1, derived from A. flavus, was identified as ethyl 2-hydroxy-5,6-dimethyl-4-oxocyclohex-2-ene-1-carboxylate, with a mass of 212, whereas compound 2, isolated from P. notatum, was identified as 3-amino-2-(cyclopenta-2,4-dien-1-ylamino)-8-methoxy-4H-chromen-4-one, with an exact mass of 270. Based on bioassay results, compound 1 was subjected to brine shrimp lethality assay and compound 2 was tested for its antibacterial potential. Compound 1 exhibited 30% lethality against brine shrimp larvae at a concentration of 100 µg mL−1, whereas at 1000 µg mL−1 the mortality increased to 70%. Compound 2 displayed notable antibacterial potential, forming inhibition zones of 30, 24, 19, and 12 mm against S. aureus, E. coli, B. subtilis, and S. flexneri, respectively. In comparison, the standard antibiotic tetracycline produced inhibition zones of 18, 18, 15, and 10 mm against the respective bacterial strains at the same concentration.