biostudies-literatureUnknown9(9)Guerrini AThe poultry red mite <i>Dermanyssus gallinae</i> is the most important blood-sucking ectoparasite in egg-laying hen facilities. The aim of this study was to evaluate the in vitro acaricidal activity of different concentration of authorized (phoxim, ByeMite^®, 500 mg/mL) and unauthorized (fipronil, Frontline^® 250 mg/100 mL spray) molecules on 14 field isolates of <i>D. gallinae</i> collected from different ornamental poultry farms from different Italian regions. The sensitivity test was performed by contact exposure to four concentrations of each insecticide diluted at 1:5 (10,000-2000-400-80 ppm for phoxim, 500-100-20-4 ppm for fipronil) on a filter paper. The effectiveness of the treatment was significantly (<i>p</i> &lt; 0.0001) associated with the dose of the pesticVeterinary sciences486https://www.ebi.ac.uk/biostudies/studies/S-EPMC9504075biostudies-literatureEvaluation of the Acaricidal Effectiveness of Fipronil and Phoxim in Field Populations of <i>Dermanyssus gallinae</i> (De Geer, 1778) from Ornamental Poultry Farms in Italy.PMC9504075Morandi BDini FMBrambilla GGuerrini AGaluppi RRoncada PfalseEvaluation of the Acaricidal Effectiveness of Fipronil and Phoxim in Field Populations of <i>Dermanyssus gallinae</i> (De Geer, 1778) from Ornamental Poultry Farms in Italy.The poultry red mite <i>Dermanyssus gallinae</i> is the most important blood-sucking ectoparasite in egg-laying hen facilities. The aim of this study was to evaluate the in vitro acaricidal activity of different concentration of authorized (phoxim, ByeMite^®, 500 mg/mL) and unauthorized (fipronil, Frontline^® 250 mg/100 mL spray) molecules on 14 field isolates of <i>D. gallinae</i> collected from different ornamental poultry farms from different Italian regions. The sensitivity test was performed by contact exposure to four concentrations of each insecticide diluted at 1:5 (10,000-2000-400-80 ppm for phoxim, 500-100-20-4 ppm for fipronil) on a filter paper. The effectiveness of the treatment was significantly (<i>p</i> &lt; 0.0001) associated with the dose of the pestic2022-01-01T00:00:00Z2022 Sep2025-04-27T01:54:52.097Z2025-04-06T18:26:35.891ZS-EPMC95040753613670310.3390/vetsci9090486