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In vitro evaluation of the response of Dermanyssus gallinae to products in aqueous suspension

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Abstract

The hematophagous mite Dermanyssus gallinae poses a serious sanitary problem in the Brazilian laying poultry industry. Its control is typically performed with acaricides, either in powder or liquid form. However, the intensive use of these products has caused populations of this species to develop tolerance and even resistance. The aim of the present study is to evaluate the response of eggs and adults of D. gallinae to products in aqueous suspension according to commercial indication and as per the recommendations of the Brazilian Ministry of Agriculture, Livestock and Supply. The study used four acaricide products (product 1: cypermethrin, chlorpyrifos, and piperonyl butoxide; product 2: alkyl-benzyl-dimethyl ammonium chloride, glutaraldehyde, deltamethrin; product 3: dichlorvos; product 4: fluralaner) tested in vitro using the contact method. Distilled water was used in the control group. The effectiveness of each of the products differed significantly between eggs and adults. Products 2, 3, and 4 caused 100% of adult mortality up to day 5 after start of treatment, product 1 97.5%. The corrected mortality (non-viability) of eggs was 21.4% (product 1) 39.4% (product 2), 47.8% (product 3), and 14.4% (product 4). Although the products evaluated were effective against adults of D. gallinae, their effectiveness against eggs was lower under the same conditions. This finding might be directly related to frequent D. gallinae reinfestations in poultry houses.

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Acknowledgements

The authors are grateful to Universidade do Vale do Taquari—Univates for its financial support and for providing the material required to conduct this study.

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No specific funding is associated with this case report.

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AS, LJ, GLS, and FRS designed the study; AS, DM performed the research and laboratory activities; AS, LJ, GLS, NJF, and FRS contributed to diagnosis and writing; AS, LJ, and GLS drafted the paper with contributions from all other authors.

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Correspondence to Angelica Sulzbach.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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All authors participated voluntarily in the research.

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Sulzbach, A., Mallmann, D., Silva, F.R. et al. In vitro evaluation of the response of Dermanyssus gallinae to products in aqueous suspension. Exp Appl Acarol 86, 201–209 (2022). https://doi.org/10.1007/s10493-022-00697-9

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  • DOI: https://doi.org/10.1007/s10493-022-00697-9

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