Mite Research Articles

GD01 (P25) Considering the burden of scabies alongside a mass drug administration treatment programme in an indigenous community in northern Australia

Abstract Scabies is estimated to affect 455 million people worldwide and is one of 20 neglected tropical diseases recognized by the World Health Organization (WHO). It is caused by a parasitic mite infestation that is hyperendemic in low-resource regions, and the disease burden in northern Australia is believed to be among the highest in the world. However, few recent prevalence assessments have been conducted in northern Australia and it is not known whether historical assessments are still representative of the disease burden. Therefore, it is difficult to advocate for the allocation of government funding and resources without accurate information on the burden of disease. Considering the effectiveness of an ivermectin-based mass drug administration (MDA) treatment programme in northern Australia is important to explore a control strategy, following successful large trials conducted in the Pacific and recommendations from the WHO. The aim was to consider the burden of scabies and other skin conditions in an indigenous community in northern Australia, from undertaking a simplified skin assessment of all consenting community residents. An observational cross-sectional study design was used for this purpose. Five field teams covered different regions in Maningrida. The teams were comprised of a medical practitioner from the investigative team who worked alongside a local healthcare worker and an Aboriginal healthcare worker. All community residents who gave verbal consent were administered ivermectin, or topical permethrin cream if ivermectin was contraindicated, as part of a MDA programme, which was locally developed and implemented by the Mala’la Health Service. Simplified skin examinations (n = 1306) were conducted in Maningrida during Healthy Skin Week from 14 to 18 November 2022, with verbal consent from 99% of community residents approached for recruitment to undergo a simplified skin assessment and administration of ivermectin as part of the MDA treatment programme. The point prevalence for scabies was 25.2% (330 individuals). Ninety-three people (7.1%) were diagnosed with impetigo, and ∼40% of community residents had evidence of skin disease. No study participants were diagnosed with crusted scabies. Scabies is endemic in indigenous communities in northern Australia. This was the first prevalence assessment to be conducted in the Northern Territory since the East Arnhem Healthy Skin Project, which concluded in 2007, and the first MDA treatment programme conducted by an aboriginal medical service as a local health intervention. The consideration of effective rapid mapping and regional control strategies is essential to tailor a public health response that addresses the high burden of skin disease in northern Australia.

P25 Considering the burden of scabies alongside a mass drug administration treatment programme in an indigenous community in northern Australia

Abstract Scabies is estimated to affect 455 million people worldwide and is one of 20 neglected tropical diseases recognized by the World Health Organization (WHO). It is caused by a parasitic mite infestation that is hyperendemic in low-resource regions, and the disease burden in northern Australia is believed to be among the highest in the world. However, few recent prevalence assessments have been conducted in northern Australia and it is not known whether historical assessments are still representative of the disease burden. Therefore, it is difficult to advocate for the allocation of government funding and resources without accurate information on the burden of disease. Considering the effectiveness of an ivermectin-based mass drug administration (MDA) treatment programme in northern Australia is important to explore a control strategy, following successful large trials conducted in the Pacific and recommendations from the WHO. The aim was to consider the burden of scabies and other skin conditions in an indigenous community in northern Australia, from undertaking a simplified skin assessment of all consenting community residents. An observational cross-sectional study design was used for this purpose. Five field teams covered different regions in Maningrida. The teams were comprised of a medical practitioner from the investigative team who worked alongside a local healthcare worker and an Aboriginal healthcare worker. All community residents who gave verbal consent were administered ivermectin, or topical permethrin cream if ivermectin was contraindicated, as part of a MDA programme, which was locally developed and implemented by the Mala’la Health Service. Simplified skin examinations (n = 1306) were conducted in Maningrida during Healthy Skin Week from 14 to 18 November 2022, with verbal consent from 99% of community residents approached for recruitment to undergo a simplified skin assessment and administration of ivermectin as part of the MDA treatment programme. The point prevalence for scabies was 25.2% (330 individuals). Ninety-three people (7.1%) were diagnosed with impetigo, and approximately 40% of community residents had evidence of skin disease. No study participants were diagnosed with crusted scabies. Scabies is endemic in indigenous communities in northern Australia. This was the first prevalence assessment to be conducted in the Northern Territory since the East Arnhem Healthy Skin Project, which concluded in 2007, and the first MDA treatment programme conducted by an aboriginal medical service as a local health intervention. The consideration of effective rapid mapping and regional control strategies is essential to tailor a public health response that addresses the high burden of skin disease in northern Australia.

Potential Delayed Healing in Wounds with Scabies Comorbidity: A Review about Immunological State and Oxidative Stress in Scabies Infestation

Scabies is a highly contagious skin disease caused by the human itch mite Sarcoptes scabiei var. hominid. Having scabies infestation coexisting in the same human body with a wound potentially lead to delayed wound healing. We constituted this literature review discussing wound healing in relation woth immunological state and oxidative stress in scabies infestation using information from literatures obtained from Google Scholar and PubMed. The immune response to scabies infection involves multiple layers of defense mechanisms, including the skin's defense mechanisms, T-cells, keratinocytes, and cytokines. Scabies mites can trigger upregulation of pro-inflammatory cytokines interleukins-1α (IL-1α) and interleukins-1β (IL-1β), which play a critical role in the early phases of wound healing by promoting the recruitment of immune cells and stimulating the production of growth factors and extracellular matrix proteins. Scabies mite infestation also triggers a sustained release of reactive oxygen species (ROS) from neutrophils which later becomes an oxidative stress leading to delayed healing and chronic inflammation. Topical treatment for scabies usually involves pesticide substances which, despite its therapeutic effect, have side effect of triggering ROS production. Comprehending the immunological state and oxidative stress in scabies infestation is essential in planning proper management for every wound with scabies comorbidity.

Effects of tomato inoculation with the entomopathogenic fungus Metarhizium brunneum on spider mite resistance and the rhizosphere microbial community.

Entomopathogenic fungi have been well exploited as biocontrol agents that can kill insects through direct contact. However, recent research has shown that they can also play an important role as plant endophytes, stimulating plant growth, and indirectly suppressing pest populations. In this study, we examined the indirect, plant-mediated, effects of a strain of entomopathogenic fungus, Metarhizium brunneum on plant growth and population growth of two-spotted spider mites (Tetranychus urticae) in tomato, using different inoculation methods (seed treatment, soil drenching and a combination of both). Furthermore, we investigated changes in tomato leaf metabolites (sugars and phenolics), and rhizosphere microbial communities in response to M. brunneum inoculation and spider mite feeding. A significant reduction in spider mite population growth was observed in response to M. brunneum inoculation. The reduction was strongest when the inoculum was supplied both as seed treatment and soil drench. This combination treatment also yielded the highest shoot and root biomass in both spider mite-infested and non-infested plants, while spider mite infestation increased shoot but reduced root biomass. Fungal treatments did not consistently affect leaf chlorogenic acid and rutin concentrations, but M. brunneum inoculation via a combination of seed treatment and soil drenching reinforced chlorogenic acid (CGA) induction in response to spider mites and under these conditions the strongest spider mite resistance was observed. However, it is unclear whether the M. brunneum-induced increase in CGA contributed to the observed spider mite resistance, as no general association between CGA levels and spider mite resistance was observed. Spider mite infestation resulted in up to two-fold increase in leaf sucrose concentrations and a three to five-fold increase in glucose and fructose concentrations, but these concentrations were not affected by fungal inoculation. Metarhizium, especially when applied as soil drench, impacted the fungal community composition but not the bacterial community composition which was only affected by the presence of spider mites. Our results suggest that in addition to directly killing spider mites, M. brunneum can indirectly suppress spider mite populations on tomato, although the underlying mechanism has not yet been resolved, and can also affect the composition of the soil microbial community.

An unusual outbreak of dermatitis due to rodent mite infestation in an acute-care hospital.

We report an outbreak of dermatitis associated with Ornithonysus bacoti and Liponyssoides sanguineus infestation in an acute ambulatory care setting. Healthcare workers developed dermatitis prior to the identification of the outbreak. A collaborative team effort resulted in complete eradication.

Grafting enhances drought tolerance by regulating and mobilizing proteome, transcriptome and molecular physiology in okra genotypes.

Drought stress poses a serious concern to the growth, development, and quality of the okra crop due to factors including decreased yield, inadequate development of dietary fibre, increased mite infestation, and decreased seed viability. Grafting is one of the strategies that have been developed to increase the drought stress tolerance of crops. We conducted proteomics, transcriptomics and integrated it with molecular physiology to assess the response of sensitive okra genotypes; NS7772 (G1), Green gold (G2) and OH3312 (G3) (scion) grafted to NS7774 (rootstock). In our studies we observed that sensitive okra genotypes grafted to tolerant genotypes mitigated the deleterious effects of drought stress through an increase in physiochemical parameters, and lowered reactive oxygen species. A comparative proteomic analysis showed a stress responsive proteins related to Photosynthesis, energy and metabolism, defence response, protein and nucleic acid biosynthesis. A proteomic investigation demonstrated that scions grafted onto okra rootstocks increased more photosynthesis-related proteins during drought stress, indicating an increase in photosynthetic activity when plants were subjected to drought stress. Furthermore, transcriptome of RD2, PP2C, HAT22, WRKY and DREB increased significantly, specifically for grafted NS7772 genotype. Furthermore, our study also indicated that grafting improved the yield components such as number of pods and seeds per plant, maximum fruit diameter, and maximum plant height in all genotypes which directly contributed towards their high resistance towards drought stress.

Mite non-reproduction, recapping behavior, and hygienic behavior (freeze-kill method) linked to Varroa destructor infestation levels in selected Apis mellifera colonies.

The genetic selection of honey bees (Apis mellifera) possessing specific social hygienic behaviors offers the beekeeping industry the possibility of controlling the Varroa destructor parasite and thus reducing its dependence on acaricides. However, the links between these behavioral traits are not yet well defined, which limits genetic progress in breeding programs. We measured the following behavioral varroa resistance traits: freeze-kill brood (FKB) and pin-kill brood (PKB) assays, varroa-sensitive hygiene (VSH), pupae removal, mite non-reproduction (MNR), and recapping activity. We found 2 negative and significant relationships: 1) between the recapping of cells infested with varroa and the total number of recapped cells, and 2) between the recapping of cells infested with varroa and VSH. We also selected the best predictive model of varroa infestation levels using the "step-wise" approach based on the Akaike information criterion. Our model revealed that MNR and FKB were significantly related to the varroa population levels, with a negative relationship; recapping was significantly related to mite infestation levels, with a positive relationship. Thus, a higher MNR or FKB score was linked to lower levels of mite infestation in colonies on August 14 (prior to fall infestation treatments); a higher recapping activity was linked to a higher level of mite infestation. Recapping behavior could be a useful trait to aid the selection of varroa-resistant bee lineages.

Expression of Molecular Markers of Resilience against Varroa destructor and Bee Viruses in Ethiopian Honey Bees (Apis mellifera simensis) Focussing on Olfactory Sensing and the RNA Interference Machinery

Varroa destructor mites and the viruses it vectors are two major factors leading to high losses of honey bees (Apis mellifera) colonies worldwide. However, honey bees in some African countries show resilience to varroa infestation and/or virus infections, although little is known about the mechanisms underlying this resilience. In this study, we investigated the expression profiles of some key molecular markers involved in olfactory sensing and RNA interference, as these processes may contribute to the bees' resilience to varroa infestation and virus infection, respectively. We found significantly higher gene expression of the odorant binding protein, OBP14, in the antennae of Ethiopian bees compared to Belgian bees. This result suggests the potential of OBP14 as a molecular marker of resilience to mite infestation. Scanning electron microscopy showed no significant differences in the antennal sensilla occurrence and distribution, suggesting that resilience arises from molecular processes rather than morphological adaptations. In addition, seven RNAi genes were upregulated in the Ethiopian honey bees and three of them-Dicer-Drosha, Argonaute 2, and TRBP2-were positively correlated with the viral load. We can conclude that the antiviral immune response was triggered when bees were experiencing severe viral infection and that this might contribute to the bees' resilience to viruses.

꿀벌응애류 방제용 개미산에 대한 조건별 기화량 평가

Honeybees are an important species influencing many aspects of human life, particularly economic and agriculture. Plant production depends upon pollination, and this is mainly enabled by honebees. Beekeepers across the Korea are experiencing unprecedented drops and losses in honeybee colonies. These losses have been attributed to bee mites (Varroa destructor and Tropilaelaps mercedesae) infestation. Application of acaricides is the most common practice to control bee mites. Among acaricides, formic acid is quite popular in Varroa mites control due to a natural substance with low residue levels in honey. However, beekeepers cannot use it without proper knowledge because it can cause significant harm to honeybees if used incorrectly. Therefore, this study was conducted to investigate how the vaporization rate of formic acid changes depending on the season in Korea.

Assessment of Camel Mange Mite Prevalence In Kumbi Woreda, Eastern Harergae, Ethiopia

Camel mange, an exceedingly infectious ectoparasitism brought on by the parasite mite Sarcoptes scabiei and spread through direct or indirect contact, is one of the most significant parasitic disorders afflicting camels in Ethiopia. Economically significant infectious camel illness called camel mange affects the health and production of these animals. In order to ascertain the prevalence of camel mange mites and related risk factors in Kumbi woreda in Eastern Hararghe, Ethiopia, a cross-sectional study was carried out between May and November 2019. A total of 384 animals were randomly chosen for this investigation, and 96 camels tested positive for mange mite infestation. Skin scrapings were used to recover mange from suspicious lesions, which were then inspected under a microscope. As a result, 25% of camels were discovered to have mange mites. In every skin scraping sample taken from the suspected mange mite lesions, only Sarcoptes scabiei var. cameli mite species was found. PA, sex, age, physical condition status, and herd size were thought to be risk factors. Only the herd size and body condition shows a statistically significant difference in the prevalence of mange mites (P 0.05), whereas the PA, sex, and age did not exhibit any significant differences in mange infestation. According to this study, mange mites are present in camel papulations in the Kumbi woreda, which may negatively impact the health and productivity of the camels. To lessen the impact of mange mite infestation on camel husbandry, more emphasis should be placed on improving the management system, along with additional research and control measures.

Tropilaelaps mercedesae Infestation Is Correlated with Injury Numbers on the Brood and the Population Size of Honey Bee Apis mellifera.

Tropilaelaps mercedesae, one of the most devastating parasitic mites of honey bee Apis mellifera hosts, is a major threat to honey products by causing severe damage to honey bee colonies. Here, we recorded injury numbers caused by T. mercedesae to different body parts of the larval, pupal, and crippled adult stages of honey bee A. mellifera. We evaluated the relationship between infestation rate and injury numbers per bee for both larvae and pupae. We also noted the total bee numbers per beehive and examined the relationship between the infestation rate and population size. T. mercedesae infested all developmental stages of honey bees, with the highest injury numbers in the abdomens of bee pupae and the antennas of crippled adult bees. Although larvae received more injury numbers than pupae, both infestation rate and injury numbers decreased as the larval stage progressed to the pupal stage. The infestation rate increased as the population size per beehive decreased. This study provided new perspectives to the understanding of changes in the effects of T. mercedesae infestations on different developmental stages of honey bees. It also showed useful baseline information for screening honey bee stock that might have high defensive behaviors against mite infestation.

Poultry red mite eradication potential of ivermectin and allicin combination treatment.

Existing treatments against poultry red mite (PRM; Dermanyssus gallinae) infestation have reduced efficacy or exhibit hazardous effects on chickens. Considering the economic importance of chickens, development of a safe and effective method for exterminating PRMs is necessary. Ivermectin and allicin are effective against some ectoparasites; however, their acaricidal efficacies against PRMs remain unknown. To evaluate individual and combined efficacies of ivermectin and allicin in exterminating PRMs. Different concentrations (0.10-1.0mg/mL) of ivermectin (1mL) were applied via dropping method in different insect culture dishes (ICDs), prior to transferring PRMs. For the spraying method, PRMs were transferred to ICDs, before spraying ivermectin (1mg/mL) solution (1mL). Further, the acaricidal effect of allicin on PRMs was evaluated by applying different concentrations (0.25-1.0mg/mL) of allicin (1mL). The combined acaricidal effects of ivermectin and allicin were analysed using four concentration combinations. PRM death rates were determined after 2h, 24h, 2 days, 5 days and 7 days of drug application. Ivermectin application (1mg/mL) exterminated 64% and 100% of PRMs on 1 and 5 days, respectively, and prevented their revival. Further, 0.5mg/mL ivermectin and 1mg/mL allicin individually exterminated 98% and 44% of PRMs, respectively, within 7 days of treatment. In combination, 0.5mg/mL ivermectin and 0.5mg/mL allicin exterminated 100% of PRMs within 5 d of treatment. The most effective combination was 0.25mg/mL ivermectin + 1.00mg/mL allicin. The efficacy of ivermectin-allicin combination in exterminating PRMs was demonstrated. This novel approach could be optimised for industrial applications.

Arbuscular mycorrhizal fungi provides enhanced development and reduced mite incidence in Phaseolus vulgaris L. by direct root colonization and via the common mycorrhizal network

Arbuscular mycorrhizal fungi (AMF) are important to agriculture due to positive effects on development and resistance to attack by herbivores in agricultural crops. AMF can affect a single plant by directly colonizing its roots and two or more plants through the common mycorrhizal network (CMN). This work aimed to analyze the influence of AMF on the development of Phaseolus vulgaris and on the incidence of the mite Tetranychus urticae in bean plants colonized directly by mycorrhizal propagules or linked by the CMN. The root systems of two plants were either separated by an impassable barrier so that one or both plants could be colonized by the mycorrhizal propagules without forming the RMC, or they were separated by a steel mesh that allowed the outer hyphae of the AMF on the roots of one of the plants to colonize the non-mycorrhizal roots of the other plant and form the RMC. The mite infestation occurred first on one plant and at the end of the experiment on all. Percentage of mycorrhizal colonization, dry mass of aerial part and roots, number of reproductive structures and mite incidence were analyzed. The colonization by the mycorrhizal propagules and the hyphae of the MRC positively influenced the vegetative and reproductive development of P. vulgaris and resulted in lower mite incidence on the leaflets of the plants. Therefore, direct colonization of P. vulgaris roots by AMFs and via CMR improves plant development and resistance of bean plants to T. urticae mite infestation.

Into the large ears: otitis externa associated with nematodes, mites, and bacteria in Asian elephants (Elephas maximus)

BackgroundThe Asian elephant (Elephas maximus), which is an endangered species, harbors several parasites. Among the ectoparasites that it harbors, ear mites of the genus Loxanoetus have the potential to cause external otitis, an inflammation that may also be associated with the presence of other microorganisms. We assessed the relationships between ear mites, nematodes, yeast, bacterial rods, and cocci sampled from the ears of captive Asian elephants in Thailand. In addition, we discuss the possibility that dust-bathing behavior may be triggered by ear mite infestation, and that this in turn may lead to contamination of the ears with soil microorganisms.Methods Legally owned captive Asian elephants (n = 64) were sampled. Ear swabs were individually collected from both ears and microscopically examined for the presence of mites, nematodes, yeast, bacterial rods, cocci, and host cells. Mites and nematodes were identified to species level using morphological and molecular methods.ResultsLoxanoetus lenae mites were present in 43.8% (n = 28/64) of the animals (19 animals with mites in one ear and nine animals with mites in both ears). Nematodes of the genus Panagrolaimus were detected in 23.4% (n = 15/64) of the animals (10 with nematodes in one ear and five with nematodes in both ears). In adult elephants (Fisher’s exact test, P = 0.0278) and female elephants (Fisher’s exact test, P = 0.0107), the presence of nematodes in both ears was significantly associated with the presence of mites. In addition, higher categorical burdens of nematodes were also significantly associated with the presence of mites (Fisher’s exact test, P = 0.0234) and epithelial cells (Fisher’s exact test, P = 0.0108), and marginally significantly associated with bacterial cocci (Fisher’s exact test, P = 0.0499).ConclusionsThe presence of L. lenae mites in the ear canals of the Asian elephants was significantly associated with the occurrence of other microorganisms, such as soil nematodes, bacteria and yeasts. The presence of mites in their ears may increase the dust-bathing behavior of elephants which, if confirmed, represents a further paradigmatic example of a parasitic infestation affecting animal behavior.Graphical

Significant, but not biologically relevant: Nosema ceranae infections and winter losses of honey bee colonies

The Western honey bee Apis mellifera, which provides about 90% of commercial pollination, is under threat from diverse abiotic and biotic factors. The ectoparasitic mite Varroa destructor vectoring deformed wing virus (DWV) has been identified as the main biotic contributor to honey bee colony losses worldwide, while the role of the microsporidium Nosema ceranae is still controversially discussed. In an attempt to solve this controversy, we statistically analyzed a unique data set on honey bee colony health collected from a cohort of honey bee colonies over 15 years and comprising more than 3000 data sets on mite infestation levels, Nosema spp. infections, and winter losses. Multivariate statistical analysis confirms that V. destructor is the major cause of colony winter losses. Although N. ceranae infections are also statistically significantly correlated with colony losses, determination of the effect size reveals that N. ceranae infections are of no or low biological relevance.

Incidence of chilli mite on chilli varieties under field conditions

The current experiment was carried out to evaluate the occurrence of mites on chilli (Capsicum spp.) leaves. The trial was conducted in the experimental field and laboratory of RSRC, BARI, from December 2020 to April 2021. Three released varieties (viz. BARI Morich 1, BARI Morich 2, and BARI Morich 3) and six genotypes (Viz. G10, G13, G25, G27, G30, and G31) were used as the test crops of the experiment. The findings showed a considerable amount of variation among the treatments. Regarding the number of mites/leaf, the G25 had the highest mean number (7.24) whereas the G31 had the lowest (0.69). The G30 was the most productive in terms of yield (512.27 g/plant). The weight of each fruit and the number of fruits per plant were directly related to yield. On the contrary, the G10 and the G13 supplied an optimum yield per plant, whereas the G25 produced the least yield (21.02/plant). The correlation between yield and mite infestation was negative, and the results revealed that the BARI Morich-1, the G27, and the G31 were highly resistant to chilli mite infestation, and the G13, the BARI Morich-3, and the G30 were resistant, while the BARI Morich-2 was only moderately resistant. The G10 was tolerant and the G25 was susceptible to chilli mite infestation. The results concluded that the tested genotypes G13, G27, G30 and G31 showed remarkable resistance to mite infestation. J. Asiat. Soc. Bangladesh, Sci. 48(1-2): 123-136, June-December 2022

Amniotic Membrane Transplantation for Paracentral Corneal Perforations

Objective: To report the clinical efficacy of Amniotic Membrane Transplantation (AMT) for paracentral perforations caused by Blepharokeratoconjunctivitis (BKC). Methods: A retrospective review was performed on consecutive patients that had paracentral corneal perforations caused by BKC and were subsequently treated with AMT between October 2019 and September 2021. Visual acuity (BCVA), anterior chamber depth, angle opening, corneal thickness and number of Demodex mites were examined before and after the operation. Results: Eleven eyes of 11 patients (2 males, 9 females, aged 11- 22 years old) with BKC were included in the analysis. Three months after AMT, BCVA significantly improved from 1.14 ± 0.8 at baseline to 0.35 ± 0.2 (p=0.004) and the proportion of patients with mite infestation decreased from 7 cases (64%) to 2 cases (18%). OCT confirmed the corneal perforations healed with normal corneal thickness and formation of anterior chamber with normal angle opening. During the follow up duration of 6-17 months, no recurrence or complications were noted. Conclusion: This case series suggests AMT can restore vision and corneal thickness in patients with aseptic corneal perforations caused by BKC.

Development and Validation of Innovative Machine Learning Models for Predicting Date Palm Mite Infestation on Fruits

The date palm mite (DPM), Oligonychus afrasiaticus (McGregor), is a key pest of unripe date fruits. The detection of this mite depends largely on the visual observations of the webs it produces on the green fruits. One of the most important problems of DPM control is the lack of an accurate decision-making approach for monitoring and predicting infestation on date fruits. Therefore, this study aimed to develop, evaluate, and validate prediction models for DPM infestation on fruits based on meteorological variables (temperature, relative humidity, wind speed, and solar radiation) and the physicochemical properties of date fruits (weight, firmness, moisture content, total soluble solids, total sugar, and tannin content) using two machine learning (ML) algorithms, i.e., linear regression (LR) and decision forest regression (DFR). The meteorological variables data in the study area were acquired using an IoT-based weather station. The physicochemical properties of two popular date palm cultivars, i.e., Khalas and Barhee, were analyzed at different fruit development stages. The development and performance of the LR and DFR prediction models were implemented using Microsoft Azure ML. The evaluation of the developed models indicated that the DFR was more accurate than the LR model in predicting the DPM based on the input variables, i.e., meteorological variables (R2 = 0.842), physicochemical properties variables (R2 = 0.895), and the combination of both meteorological and the physicochemical properties variables (R2 = 0.921). Accordingly, the developed DFR model was deployed as a fully functional prediction web service into the Azure cloud platform and the Excel add-ins. The validation of the deployed DFR model showed that it was able to predict the DPM count on date palm fruits based on the combination of meteorological and physicochemical properties variables (R2 = 0.918). The deployed DFR model by the web service of Azure Ml studio enhanced the prediction of the DPM count on the date fruits as a fast and easy-to-use approach. These findings demonstrated that the DFR model using Azure Ml Studio integrated into the Azure platform can be a powerful tool in integrated DPM management.

Recognition of spider mite infestations in jujube trees based on spectral-spatial clustering of hyperspectral images from UAVs.

Spider mite infestations are a serious hazard for jujube trees in China. The use of remote sensing technology to evaluate the health of jujube trees in large-scale intensive agricultural production is an effective means of agricultural control. Hyperspectral remote sensing has a higher spectral resolution and richer spectral information than conventional multispectral remote sensing, which improves the detection of crop pests and diseases. We used hyperspectral remote sensing data from jujube fields infested with spider mite in Hotan Prefecture, Xinjiang to evaluate their use in monitoring this important pest. We fused spectral and spatial information from the hyperspectral images and propose a method of recognizing spider mite infestations of jujube trees. Our method is based on the construction of spectral features, the fusion of spatial information and clustering of these spectral-spatial features. We evaluated the effect of different spectral-spatial features and different clustering methods on the recognition of spider mite in jujube trees. The experimental results showed that the overall accuracy of the method for the recognition of spider mites was >93% and the overall accuracy of the band clustering-density peak clustering model for the recognition of spider mite reached 96.13%. This method can be applied to the control of jujube spider mites in agricultural production.

A Case Report of a 12-Year Old Boy Infested with Poultry Red Mites, Dermanyssus gallinae (Acari: Mesostigmata), Acquired from his Syrian Hamster

The poultry red mite Dermanyssus gallinae, known as the primarily ectoparasite of laying hens and synanthropic birds (e.g. pigeons), can also bite humans, causing Red-Mite Dermatitis (RMD) with untypical symptoms of erythematous maculo-papular rash and urticaria-like lesions. In this study, we present the first case of RMD diagnosed in a 12 year old boy, resulting from bites of poultry mites derived from his pet hamster. The results show that the potential risk of human exposure to D. gallinae mites in the urban environment, is associated not only with the nesting and roosting feral pigeons in direct vicinity of human apartments, but may also result from the holding of hamsters. Since this hamster had no contact with other animals, we assume that its bedding was contaminated with D. gallinae, and played a role of the major source of these mites for the host and then the child. In conclusion, even if pet animals are rather accidental hosts for D. gallinae, effective measures to monitor and avoid cases of mite-dermatitis in urban dwellers require: (i) correct morphological identification of mite species, (ii) finding the sources of mite infestations, (iii) the removal of abandoned nests of their hosts, (iv) thorough disinfestation. Further eco-epidemiological research is urgently needed to identify non-avian host species including pet animals and mechanisms facilitating spreading of D. gallinae in urban environments.