Number Of Worms Research Articles

A male-derived nonribosomal peptide pheromone controls female schistosome development

Schistosomes cause morbidity and death throughout the developing world due to the massive numbers of eggs female worms deposit into the blood of their host. Studies dating back to the 1920s show that female schistosomes rely on constant physical contact with a male worm both to become and remain sexually mature; however, the molecular details governing this process remain elusive. Here, we uncover a nonribosomal peptide synthetase that is induced in male worms upon pairing with a female and find that it is essential for the ability of male worms to stimulate female development. We demonstrate that this enzyme generates β-alanyl-tryptamine that is released by paired male worms. Furthermore, synthetic β-alanyl-tryptamine can replace male worms to stimulate female sexual development and egg laying. These data reveal that peptide-based pheromone signaling controls female schistosome sexual maturation, suggesting avenues for therapeutic intervention and uncovering a role for nonribosomal peptides as metazoan signaling molecules.

ANTHELMINTIC ACTIVITY TEST OF PARE LEAVES EXTRACT (Momordica charantia L.) AGAINST WORMS Raillietina sp. BY IN VITRO

The purpose of this research is to prove that pare leaf extract (Momordica charantia L.) has anthelmintic activity against Raillietina sp. in vitro. This study consisted of four treatments and each treatment contained six replications, each of which consisted of six worms. The treatments in this research were K- with 1% CMC-Na, P1 with 2% extract concentration, P2 with 4% extract concentration, P3 with 8% extract concentration. Pare leaf extract has anthelmintic activity against Raillietina sp. in vitro with an effective dose of 8%. The higher the concentration of pare leaf extract, the higher the mortality rate of worms. The longer the immersion time, the higher the number of dead worms.

Impact of Sainfoin (Onobrychis viciifolia) Pellets on Parasitological Status, Antibody Responses, and Antioxidant Parameters in Lambs Infected with Haemonchus contortus.

Our study analyzed the parasitological status, antibody responses, and antioxidant parameters of lambs experimentally infected with a gastrointestinal nematode during the consumption of sainfoin pellets (SFPs) for 14 d. Twenty-four lambs infected with Haemonchus contortus were separated into two groups: untreated animals (control) and animals treated with SFPs (600 g dry matter/d). SFP treatment began on day (D) 30 post-infection. The number of eggs per gram (EPG) of feces was quantified on D18, D23, D26, D30, D33, D37, D40, and D44. The mean reductions in EPG on D40 and D44 were 33.6 and 36.7%, respectively. The number of abomasal worms was lower for the SFP than the control group (p < 0.05). SFP treatment did not significantly affect either the total or the local antibody response (p > 0.05). The blood activity of glutathione peroxidase was affected by the treatment (p < 0.022). Adult worms were selected for scanning electron microscopy after necropsy, but surface structures of adult H. contortus females did not differ between the groups. The treatment of lambs with SFPs directly affected the dynamics of infection, probably indirectly by mobilizing the antioxidant defensive system and antibody response thus improving animal resistance.

Machine-Learning-Based White-Hat Worm Launcher in Botnet Defense System

This article proposes a white-hat worm launcher based on machine learning (ML) adaptable to large-scale IoT network for Botnet Defense System (BDS). BDS is a cyber-security system that uses white-hat worms to exterminate malicious botnets. White-hat worms defend an IoT system against malicious bots, the BDS decides the number of white-hat worms, but there is no discussion on the white-hat worms' deployment in IoT network. Therefore, the authors propose a machine-learning-based launcher to launch the white-hat worms effectively along with a divide and conquer algorithm to deploy the launcher to large-scale IoT networks. Then the authors modeled BDS and the launcher with agent-oriented Petri net and confirmed the effect through the simulation of the PN2 model. The result showed that the proposed launcher can reduce the number of infected devices by about 30-40%.

Methodological approaches to assessing the toxicity of compounds by changing the behavioral response of soil oligochaetes

The methodological aspects of assessing the toxicity of surface-active substances (SAS) by changing the behavioral response of avoiding the substrate by earthworms Eisenia fetida andrei Bouche, 1972 were studied. The conditions for biotesting were selected, under which the method is more sensitive to the tested pollutants. In this method, 30 worms. placed in a Petri dish with a substrate unfavorable for worms (dry sand). Around it, Petri dishes with test samples of moistened sand contaminated with individual toxicants in various concentrations and their mixtures were placed radially. A control sample (wet sand) was also placed among the prototypes. When the worms selected the most favorable of the tested contaminated substrate samples, their movement from dry sand was observed. After 4 h from the start of the experiment, the number of worms in each of the compartments was counted. The toxic effect of the cationic surfactant cetyltrimethylammonium bromide (CTAB) was manifested when its content in the soil sample was from 0.001 g / kg; nonionic surfactant Tween-80 – from 1 ml / kg; anionic surfactant sodium lauryl sulfate – from 20 mg / kg.

The dilution effect in a freshwater mutualism: Impacts of introduced host species on native symbionts

AbstractThe dilution effect was originally proposed to describe the negative effect of increased host diversity on parasite or pathogen abundance; with greater host diversity, parasite or pathogen levels per host are predicted to be lower due to a higher probability of dispersing parasites or pathogens encountering noncompetent hosts. Dilution effects could occur in many mutualisms if dispersing symbionts encounter hosts that vary in their competence. Introduced, non‐native hosts can change the community competence of a local group of host species. Crayfish introductions are occurring world‐wide and these introductions are likely disrupting native crayfish‐symbiont systems. Branchiobdellidan symbionts declined on native Cambarus crayfish co‐occurring with non‐native Faxonius crayfish in the New River watershed, USA. We performed an experiment investigating the effect of host density (1 vs. 2 native hosts) and host diversity (1 native host and 1 introduced host) on branchiobdellidan abundance. The introduced Faxonius cristavarius is a noncompetent host for these worms. Six C. ingens were stocked on a Cambarus chasmodactylus in each treatment and worm numbers were followed over 34 days. Worm numbers decreased over time on C. chasmodactylus alone and in the treatment in which a C. chasmodactylus was paired with an F. cristavarius. Worm numbers remained highest in the 2 C. chasmodactylus treatment. There was no effect of host diversity on worm reproduction. Crayfish invasions may have negative effects on mutualistic symbionts depending on the competence of introduced hosts. Loss of native symbionts is one of the potential hidden, negative effects of invasions on native freshwater diversity.

Evaluating the Changes in Quantities and Types of Substrates Containing Organic Wastes on the Growth and Reproduction of the Earthworm (Eisenia fetida)

Background: The feasibility of converting organic wastes into vermicompost and the effect of adding such wastes into the substrate on the growth and reproduction of the earthworm (Eisenia fetida) were investigated in the present study through a two-factor factorial experiment with a completely randomized design in triplicate. Methods: The first factor with nine different treatment combinations included control; potato (P); carrot pulp (C); vegetables (V); sawdust (S); potato, vegetables, and carrot pulp (PVC); sawdust, potato, and carrot pulp (SPC); vegetables, sawdust, and potato (VSP); and carrot pulp, vegetables, potato, sawdust (CVPS). The second factor was related to two different amounts of 100 and 150 g. This research was carried out using the analysis of basket trials in Tonekabon County, Mazandaran Province, Iran, in 2021. The base substrate of earthworms was animal manure positioned in boxes and washed with urban tap water to reach a pH value between 6.5 to 7. After ripening the vermicompost, the boxes were emptied, and the worms were counted. Results: The analysis of variance showed a significant difference in the number of cocoons between the studied treatments (P&lt;0.1), but there was no significant difference in the number of worms between groups. The maximum number of cocoons (mean=605) corresponded to the sawdust treatment combination (S), and the minimum number of cocoons (mean=185) was found in the vegetable treatment combination (V). Conclusion: The treatment of manure bed with sawdust wastes provided the optimal conditions for the growth and reproduction of E. fetida.

Cryopreservation of C. elegans and Other Nematodes with Dimethyl Sulfoxide and Trehalose.

One of the key attributes that has contributed to the popularity of Caenorhabditis elegans as a model system is its ability to survive freezing. By preserving stocks at ultralow temperature, researchers have been able to generate an unlimited number of strains without the burden of constantly maintaining them. This has facilitated the use of large-scale forward genetic screens and CRISPR-mediated genome editing where large numbers of novel and informative mutants can be generated. Traditionally, C. elegans and other nematodes were frozen using glycerol as a cryoprotectant. While effective, a large majority of animals do not survive a typical freeze-thaw cycle. Here I describe an alternative method based on the popular combination of DMSO and trehalose as a cryoprotectant. This method allows the survival of large numbers of worms and effectively protects most developmental stages including adults.

The Influence of cobalt concentration in nutrient medium on growth of California worm biomass and metal accumulation in it

The biomass of the California redworm hybridis abiologically valuable feed additive for farm animals, poultryand fish. Worms contain a large amount of protein, lipids,vitamins and trace elements. The chemical composition ofworm biomass depends on the nutrient medium on whichit was grown. Worms are able to accumulate trace elementsfrom the nutrient medium in their body. Using this property,we conducted research on the biomass of worms enrichedwith Cobalt with the prospect of its furthe rusein fishfeeding. It was found that increasing the number and weightof worms depends on the content of Cobalt in the nutrientmedium. The in troduction of 20 mg/kg of Cobalt in to thenutrient medium increased the number and weight of wormsweighing 0.4-0.8 g, respectively, by 38.0% and 40.4%. Anincrease in the number of immature worms by 32.2% wasdetected. By adding 40 mg/kg of Cobalt to the nutrientmedium, the umber and weight of worms increase by 45.9and 51.1%, respectively. The introduction of Cobalt in theamount of 160 mg/kg resulted in a decrease in the numberof worms weighing 0.4-0.8 g compared to the experimentalgroups by 6.5-27.7%. It was found that at a dose of Cobalt160 mg/kg, the number of small worms decreased relativeto the experimental groups by 24.0-50.7%. There was adecrease and weight of young worms relative to control by22.4%.It is established that with increasing cobalt content in thenutrient medium increases its concentration in the biomassof worms. The highest content of Cobalt was found in thedrymatter of the biomass of worms grown on a nutrientmedium to which was added the test metalin the amount of160 mg/kg.The biomass of worms grown on a nutrient medium towhich was added 40 mg/kg of the investigated metal canbeuse das a protein supplement with high cobalt content infish feeding. Key words: vermiculture, wormbiomass, metalaccumulation, nutrient medium, Cobalt, atomicabs orptionspectros copy.

TRICHUROSIS EN TERNEROS EN EL DEPARTAMENTO LAS COLONIAS, SANTA FE

Trichuris spp. It is a nematode that affects the mucosa of the cecum and the colon of the ruminates. Clinical cases are rare and occur when the number of adult worms is high. The objective of this work is to report a clinical case of trichurosis in a batch of 40 breeding calves raised in a pen without vegetation cover and with a very humid floor. The food was supplied in feeders, but the animals also consumed the food that fell to the floor. Three animals died from the batch. At necropsy, more than 400 specimens of worms identified as Trichuris were recovered. This case warns of the importance of the diagnosis of parasitosis in intensive breeding.

Wildfires modify the parasite loads of invasive cane toads.

The frequency and severity of wildfires are increasing due to anthropogenic modifications to habitats and to climate. Post-fire landscapes may advantage invasive species via multiple mechanisms, including changes to host–parasite interactions. We surveyed the incidence of endoparasitic lungworms (Rhabdias pseudosphaerocephala) in invasive cane toads (Rhinella marina) in near-coastal sites of eastern Australia, a year after extensive fires in this region. Both the prevalence of infection and number of worms in infected toads increased with toad body size in unburned areas. By contrast, parasite load decreased with toad body size in burned areas. By killing moisture-dependent free-living lungworm larvae, the intense fires may have liberated adult cane toads from a parasite that can substantially reduce the viability of its host. Smaller toads, which are restricted to moist environments, did not receive this benefit from fires.

The Anthelmintic Activity Of Etanol Extract of Porang Tubers Against Fasciola gigantica In Vitro

This study aims to determine the anthelmintic activity ethanol extract of porang tubers (A. oncophillus) against F. gigantica worms in vitro. There were five treatments and each treatment was done in five replications and used 10 F. gigantica. The treatments of this research were K- with CMC Na 1%, K+ with Albendazole 2.4 mg/ml, P1 with extract concentration 5%, P2 with extract concentration 10%, P3 with extract concentration 20%. The results showed that the extract of Porang tuber (A. oncophillus) had an anthelmintic effect against F. gigantica worms in vitro. In the extract with a concentration of 20%, there were anthelmintic properties that almost the same as Albendazole. The higher the extract concentration, the higher the anthelmintic properties. The longer the immersion time, the higher the number of dead worms. The morphological changes was evaluated by light microscopic examination and the results showed many histopathological changes on the morphology of F. gigantica. The results indicate that the possible use of the tubers as a potential anthelmintic against F. gigantica.

WORM BIOMASS AND VERMICOMPOST PRODUCTION BY THE EPIGEIC EARTHWORM, PERIONYX EXCAVATUS BY USING DIFFERENT ORGANIC WASTES

As the epigeic earthworms are known to be efcient and potential biodegrades and nutrient releasers, tolerant to wide range of ecological disturbances, aids in litter communication and efcient decomposers. Therefore, the present study was undertaken to nd out the inuence of various organic wastes (such as False Ashoka waste-FAW (Polyalthia longifolia), Parthenium wastePW (Parthenium hysterophorus), Cotton residue waste-CRW (Gossypium), Lawn grass waste-LGW (Agrostis) and Cattle manure-CM) on the production of worm biomass and vermicompost by the epigeic earthworm, Perionyx excavatus along with control compost experiments without worms (in triplicates) to know the potentiality of this worm species in processing of various organic wastes for the production of worm biomass as vermiprotein and vermicompost as biofertilizer. Both compost and vermicompost experimental pots were terminated after 35 and 70 days time intervals. Observations were made with respect to number of old and new adult worms, new sub-clitellates, juveniles, cocoons with their weight were noted to determine the total worm biomass (Gross biomass), biomass ratio (WBR) and Fold Increase in Worm Number (FIWN). Percent compost and vermicompost produced out of different organic waste were also calculated at the end of each experiment at35 and 70 days. The results of the present study revealed that the biomass of Perionyx excavatus such as Gross worm biomass (GWB), Worm biomass ratio (WBR) and Fold increase in worm number (FIWN) increased from 35days to 70 days time intervals in all the organic wastes (FAW, PW, CRW, LGW and CM). It was maximum in CM and minimum in FAW among all the organic wastes. There is a signicant variation was noticed in worm biomass production (GWB, WBR, and FIWN) among and between all the organic wastes except between few organic wastes at 35 and 70 days time intervals. The vermicompost production was more as compared to normal compost in all the organic wastes. Further, both compost and vermicompost production were more in CM followed by LGW, CRW, PW and minimum in FAW among all organic wastes. The signicant difference was also observed in the production of compost and vermicompost among and between different organic wastes except between few organic wastes at different time intervals. Based on the results, it can be concluded that the earthworm, Perionyx excavatus is an efcient epigeic earthworm species, effectively used in vermicomposting for the production of vermicompost and as well as in vermifarming in the production of worm biomass as vermiprotein. Further, earthworm biomass, compost and vermicompost production primarily depends on nature of organic wastes and secondly on the potentiality of earthworm species used in the experimental studies.

The flavonoid Licochalcone A induces tegumental damages in Schistosoma mansoni and impairs its oviposition in vitro

In this study, Licochalcone A (LicoA) was investigated in in vitro and in vivo assays. The survival of worms in culture, the pattern of oviposition, the count of intact tubers and the integrity of the coat were adopted in the in vitro tests. After the animals were perfused, the number of worms recovered, their location and the oogram study were the parameters analyzed to signal the existence of potential schistosomicidal activity in vivo. We observed reduction on the survival, integument integrity and reproduction of adult worms in vitro. Murine models did not show a significant difference in the parasitological parameters analyzed that indicate activity against the worms with an oral single dose of 25 mg/ kg of LicoA or two intraperitoneal injection of 50 mg/ kg LicoA. Nevertheless, it is too early to completely exclude the schistosomicide activity of LicoA, considering that the used dosage form could not provide a regular absorption of the drug.

Acanthocephalan Worms Mitigate the Harmful Impacts of Heavy Metal Pollution on Their Fish Hosts

Toxic metal pollutants in aquatic environments and infestationwith intestinal helminths adversely affect the fish health, as well as fish consumers. Acanthocephalan worms in fish intestine have a high potential to absorb and bioaccumulate different heavy metals, especially toxic ones, from the intestine via their tegument with greater efficiency than the fish intestinal wall. Herein, 47 specimens of the fish Siganusrivulatus were trapped in the Red Sea, Egypt, from a chronically polluted bay. All were intoxicatedwith Cd and Pb; 20 (42.5%) were uninfected with any intestinal worm, but the other 27 (57.5%) were infected only by the intestinal acanthocephalan Sclerocollum rubrimaris. The number of individual worms in a fish host (infrapopulation size) ranged from 32 to 236. As a reference group, 22 uncontaminated–uninfected specimens of S. rivulatus were trapped from a small unpolluted bay. Our results revealed that infection with acanthocephalans alleviatesthe harmful effectsof toxic metalson their fish hosts by: (1) lowering the elevated concentrations of both Cd and Pb in fish liver; (2) lowering the elevated levels of liver enzymes (ALT, AST, ALP, and GGT), glucose, triglycerides, and urea in fish blood serum; and (3) raising the declined levels of total protein and albumin in fish blood serum. All of these were dependent on S. rubrimaris infrapopulation size in fish intestine.

The autochthonous cases of acute opisthorchiasis in the Moscow region

Acute stages of parasitic diseases are rare diagnosed and therefore, clinicians have limited knowledge of their clinical features. We describe five autochtnonous acute cases of opisthorchiasis in Moscow region acquired from eating raw ides (L. idus). The most frequent clinical symptoms were febrile, eosinophilic syndrome with cholestasis. The patients were positive for IgG antibodies to Opisthorchis felineus. Eggs of O. felineus were found in one patient. As egg production O. felineus starts 1 month after exposure and opisthorchiasis cases in Moscow region have low numbers of worms, the sensitivity of microscopy is low. Therefore we consider opisthorchiasis in all patients of unexplained acute fever, pain in upper right abdominal quadrant, and eosinophilia with cholestasis, when patients confirm the ingestion of raw fish. We recommend one day of praziquantel 25 mg/kg TID to patients infected with O. felineus. In previous publications describing the autochtnonous cases of opisthorchiasis in Moscow region the authors supposed that cases of local infection will be found again in Moscow region and this is just a matter of time. The cases reported here confirm that this infection is endemic in Moscow region. The local people living close to rivers especially those who eat raw fish are at risk of infection O. felineus. There is a clear need to undertake special studies pertaining to the ways of promoting people living in Moscow region become aware of opisthorchiasis and to be motivated in preventive measures and treatment.

KAJIAN PUSTAKA: DIROFILARIASIS ANJING DAN KUCING KINI MEREBAK DI INDONESIA MERUSAK ARTERI PULMONALIS DAN PARU-PARU

Dirofilariasis, caused by Dirofilaria immitis, mostly known as heartworm disease, is an important mosquito-borne nematode zoonosis that naturally infects canids and other species such as cats, ferrets, and humans. There have been reports of heartworm infection from many countries in worldwide. Researchers have reported D. immitis is widely distributed in Southeast Asia because this parasitic zoonosis disease lives in temperate, tropical, and subtropical areas and can be found in colder regions. Therefore, the authors intended to provide an overview of Dirofilariasis cases in Indonesia from a global perspective. The published articles of dirofilariasis were collected and retrieved by an electronic literature search of three databases, including Google Scholar, PubMed, and Science Direct. The literature presented is intended to enhance our current understanding of the overview of D. immitis infection and its prevalence in Indonesia from a global perspective. D. immitis infection can cause caval syndrome in dogs as well as a cardiopulmonary syndrome known as Heartworm-Associated Respiratory Diseases (HARD), which can become fatal as the number of worms infecting the host increases. Whereas in cats, although the number of worms in the host are very few (one to six worms) they can cause pathological changes in the pulmonary arteries which result in a more serious infection than in dogs and endanger life.

Reduction of Ascaridia galli Pathology by Salmonella typhimurium in Broiler Chicken.

Previous studies have reported interactions between Salmonella spp. and some helminth coinfections. In this study, S. typhimurium and Ascaridia galli coinfections were analyzed, and the consequences on therapy were proposed. In a first experiment where the effect of the bacteria on the nematode was evaluated, thirty 42-day-old broiler chickens were divided into 3 groups and coinfected with both parasites. The rate of A. galli egg inoculum was kept constant at 500/ml while that of S. typhimurium varied as follows: T0 (500 A. galli eggs/ml), T104 (500 A. galli eggs/ml+104 S. typhimurium CFUs), and T106 (500 A. galli eggs/ml +106S. typhymurium CFUs). EPG and parasitic load were measured using the McMaster technic, and number of worms and their length were also measured. We observed that T106 containing 106 CFUs of Salmonella significantly reduced the EPG values, and this group recorded the lowest worm load ranging from 18 to 21 worms. Likewise, the length of the worms obtained with T104 and T106 appeared to be shorter than those of the control (T0). In a second experiment to assess the effects of the nematode on the bacteria, thirty 42-day-old broiler chickens were divided into 3 groups and coinfected with both parasites. The rate of S. typhimurium inoculum was kept constant at 106 CFUs while that of A. galli varied as follows: T0 (106CFUs), T500 (500 A. galli eggs/ml +106S. typhymurium CFUs), and T750 (750 A. galli eggs/ml +106S. typhymurium CFUs). Bacterial load was measured using Voogt technique. We observed that T500 increased the colonization time and prolonged the duration of S. typhimurium secretion. Salmonella appears to be a hyperparasite considering the deleterious effect on A. galli. Due to this, it may be prudent to combine anti-Salmonella treatment with anthelmintic so as to effectively treat pathologies caused by these two pathogens.

Relative growth ofEurynolambrus australisH. Milne Edwards &amp; Lucas, 1841 (Decapoda: Brachyura: Majidae): use of epibionts to interpret moulting patterns and maturation

AbstractMales of the brachyuran crab Eurynolambrus australisH. Milne Edwards &amp; Lucas, 1841 have three phases of growth recognizable by breaks in relative growth in the chelipeds in relation to carapace width. Females have two growth phases marked by increased abdomen width and pleopod length at sexual maturity. The difference between the maximum size of E. australis and the maximum size of the preceding phase in both sexes is large and may not be achieved in a single moult, suggesting that post-pubertal moulting could occur. Relative growth could involve both growth- and size-allometry. This is supported to some extent by the distribution of spirorbid tube worms. The lack of correlation between number and size of tube worms and crab carapace width suggests that epibionts do not accumulate over time. Crabs without attached tube worms (suggesting recent moulting) occur in all growth phases, but some of these may have recently moulted. Some large specimens, however, do carry a load of epibionts large enough to suggest terminal moulting. The possibility of post-pubertal moulting remains an open question.

The possibility of using Trichinella spiralis as an experimental model in the field of high dilutions

Background&#x0D; Trichinosis is a parasitic disease caused by ingestion larvae of Trichinella spiralis (TS). In Russia trichinosis of pigs is widely spreaded. Invasion occurs when human or animal eat contaminated meat. TS is adapted to many hosts, and due to its wide spread, there has always been a demand of safe alternatives for this infection. A lot of information has been gathered about sharp decreasing of quantity of trichinae in muscles at repeated invasion of predators. We took a chance of applying antigen to TS as a vaccine, however, rate of immunogenetic effect wasn't high. Therefore, in an experimental work, we decided to inject vaccine and immunomodulators together at the same time. &#x0D; Material and Methods&#x0D; We subjected rats infected with TS to conventional treatment (vaccine) along with Cina 6cH. There were five groups as follows: The first group was injected antigen alone and no immunomodulators; the second group was injected antigen and Ronkoleikin; the third group was injected antigen and Sodium nucleinate, the fourth group was injected antigen and Cina C6cH; and the fifth group was a control group, which was injected neither antigen nor immunomodulators. After 21 days of vaccination (or giving homeopathic medicine) rats were contaminated TS in a dose of 200germs/animal.&#x0D; Results&#x0D; The rats were euthanized after two months. They we then analysed for stomach contents and quantity of worms in muscles. The highest number of worms were found in fifth group (no antigen and no immunomodulators) (more than 2600 worms/animal. The quantity of worms in the second group (injection of antigen and Ronkoleikin) was in four times less than in the control group. The most efficient substance was Ronkoleikin (900+160 worms/animal); Sodium nucleinate (1100+100 worms/per animal); Cina C6cH (1400+50 worms/animal). &#x0D; &#x0D; Conclusion&#x0D; Cina C6cH along with and others immunomodulators was able to exhibit protective effect against experimental trichinosis. Further research with rigorous designs is needed to explore the role of Cina in Trichinella spiralis.