Dominance and Frequency of Mite Species Associated with Poultry Droppings

The present study was carried out onAl-Saqlawiya poultry farm's soil (Anbar, Iraq) for the period of 8 months (November 2018- June 2019). A total of 75 samples of poultry droppings were collectedrandomly. 552 individuals of mite,belonging to 3 orders and 8 families representing 15 species, were found. These species were: Acarus gracilis, Acarus siro, Caloglyphus berlesi, Androlaelaps casalis, Sejus temperaticus, Parasitus paraconsanguineus, Eugamasus butleri, Macrocheles medarius, Macrocheles glaber, Macrocheles muscaedomesticae, Macrocheles matrius, Kleemannia plumosus, Cheyletus eruditus, Cheyletus malaccensis, and Pyemotes herfsi. The highest population density belonged to order Astigmata, followed by orders Mesostigmata and Prostigmata, respectively. The dominance and frequency of mite species were linked to the availability of appropriate conditions in terms of food source and temperatures registered in theIraqi Meteorological Directorate. Thehighest mite population densities were recorded during the winter months compared to the summer months.

Artrópodos (Arthropoda: Arachnida e Insecta) asociados a los nidos de Neotoma mexicana (Mammalia: Rodentia) de San Miguel de Allende, Guanajuato, México

Los nidos de roedores son el refugio de distintas especies de artrópodos como pueden ser: ácaros, pulgas, chinches, piojos y pseudoescorpiones, entre otros. Algunos de ellos son de importancia médica y veterinaria porque son vectores de diversas enfermedades que pueden trasmitir al ser humano, animales domésticos y silvestres. Se recolectó un nido de Neotoma a partir del cual se identificaron 148 artrópodos de tres órdenes: Acari, Pseudoscorpiones (Arachnida) (Shultz, 2007) y Siphonaptera (Insecta). La especie más abundante fue el ácaro Cheyletus eruditus (Acari: Prostigmata: Cheyletidae) con 126 ejemplares. Tectocepheus velatus (Acari: Oribatida: Tectocepheidae) es un nuevo registro para los nidos de Neotoma. Los pseudoescorpiones representan el primer registro para Guanajuato, siendo Parachernes un nuevo registro para este microhábitat. Del orden Siphonaptera Tunga monositus es un nuevo registro para Guanajuato.

Mites in dried figs of Turkey: diversity, species composition and density

This study was conducted to determine mite species in dried figs in Aydin, Turkey between August 2014 and November 2016. A total of 141 dried fig samples were taken from producers’ storage, commercial storages and fig processing factories in Buharkent, Germencik, Incirliova, Kocarli, Kosk, Kuyucak, Merkez, Nazilli, Sultanhisar and Yenipazar districts. In addition, 24 dried fig samples were kept in storage for 8 months and the changes in mite species composition and their densities in stored figs were determined. As a result, 8 mite species belonging to 3 orders and 5 families were identified from the dried figs. Acarus siro L., Carpoglyphus lactis (L.), Glycyphagus destructor (Schrank), G. domesticus (De Geer) and Tyrophagus putrescentiae (Schrank) as pest species, and Blattisocius tarsalis (Berlese), B. mali (Oudemans) and Cheyletus eruditus (Schrank) as predatory mite species were found. Out of 141 samples, 133 were infested with mites and the infestation ratio was 94.3%. Tyrophagus putrescentiae was the most common pest species with an infestation rate of 72.3%, followed by C. lactis with 34.8%, A. siro, G. destructor and G. domesticus with 0.7% contamination, respectively. Carpoglyphus lactis was found to have the highest density with 10,488 individuals/kg in contaminated fig samples. Blattisocius tarsalis was the most common predatory mite species with an infestation rate of 77.3%. Blattisocius mali and C. eruditus were found in 9.2% and 4.3% of dried figs, respectively. This study showed that the dried fig samples kept in storage were always vulnerable to contamination with mites. Mite species composition and their densities also fluctuated over time.

Mite fauna (Acari) associated with the poultry industry in different laying hen management systems in Southern Brazil: a species key

This study is based on results from a large project on the mite diversity in commercial laying hen systems in Brazil. It aims to identify potential biocontrol agents amongst mites present in poultry farms, with a focus on one feather mite pest Megninia ginglymura. A secondary goal is to provide an operational identification tool to help the development of biological control in poultry farms. Sampling was conducted from August 2013 to August 2014, with 43 sampling events, in three different laying hen management systems. We used traps, laying hen feathers, and abandoned wild bird nests to collect the mites. A total of 38,862 mites belonging to 23 families and 39 species were found, including 17 species exclusively found in traps, six in wild bird nests, and one in feathers. The most abundant and frequent ectoparasitic species was M. ginglymura (76.3%; observed in all management systems). Amongst other mites, Tydeidae showed the highest richness with five species (Brachytydeus argentinensis (Baker, 1970), Brachytydeus australensis (Baker, 1970), Brachytydeus obnoxia (Kuznetzov and Zapletina, 1972), Brachytydeus oregonensis (Baker, 1970), and Brachytydeus tuttlei (Baker, 1965)), followed by Cheyletidae with four species (Chelacheles bipanus Summers and Price, 1970, Cheyletus eruditus (Schrank, 1781), Cheyletus malaccensis (Oudemans, 1903), and Cheletomimus (Hemicheyletia) wellsi (Baker, 1949)). Potential predatory species for biological control were C. malaccensis (9.4%), Typhlodromus transvaalensis (Nesbitt, 1951) (0.8%), Blattisocius keegani (Fox, 1947) (0.7%), and Blattisocius dentriticus (Berlese, 1918) (0.4%). A dichotomous key is provided to identify 48 species dwelling in Brazilian layer farms.

Role of Predatory Mites in Persistent Nonoccupational Allergic Rhinitis

Mites can sensitize and induce atopic disease in predisposed individuals and are an important deteriorating factor in patients with allergic rhinitis, asthma, and atopic dermatitis. Although Pyroglyphidae mites have been extensively studied, very scarce reports are available on Cheyletidae spp. especially regarding human respiratory pathology. The main objective of the present study is to investigate the clinical role of this predator mite (Cheyletus eruditus) as a respiratory antigen in a selected sensitized human population. Fifty-two adult patients were recruited from the outpatient allergy clinic to assess their eligibility for the study. The thirty-seven subjects with persistent allergic rhinitis (PAR) who fulfilled the ARIA criteria had a positive IgE response confirmed by skin prick test (SPT) toC. eruditus. Only those individuals (37/47) with a positive SPT toC. eruditusshowed a positive nasal provocation test (NPT), while 10 patients with nonallergic mild-to-moderate persistent rhinitis,control group, had a negative NPT withC. eruditus. The present paper describes a new role for the predator miteCheyletus eruditusas a respiratory allergen in a selected subset of patients in a subtropical environment afflicted with persistent nonoccupational allergic rhinitis.

Arthropod Infestation in Samples of Stored Seeds in the Czech Republic

Twenty-one types of seed samples (mainly vegetable and grass seed) were analysed in laboratory and 60% arthropod infestation (14 Acarina, 5 Psocoptera species) was found. The seeds of beet, grass, onion, radish and lettuce were most sensitive to infestation. Acarus siro was a dominant mite pest from all aspects (frequency, abundance and seed diversity infestation), followed by Tyrophagus putrescentiae, Tarsonemus granarius and Lepidoglyphus destructor. Cheyletus eruditus was a dominant predatory mite. Lepinotus patruelis was the most frequent psocid pest.