Additional information about a mange outbreak by Allopsoroptoides galli (Acari: Psoroptoididae) in commercial laying hens in the state of São Paulo, Brazil1

Tucci E.C., Soares N.M., Faccini J.L.H. & Vilas Boas D. 2014. Additional information about an outbreak by Allopsoroptoides galli (Acari: Psoroptoididae) in commercial laying hens in the state of São Paulo, Brazil. Pesquisa Veterinária Brasileira 34(8):760-762. Laboratório de Parasitologia, Instituto Biológico, Av. Conselheiro Rodrigues Alves 1252, São Paulo, SP 04014-002, Brazil. E-mail: [email protected] This paper reports additional information about a mange outbreak by the mite Allopsoroptoides galli in a commercial egg-laying hen facility in the state of São Paulo, Brazil. About half of the 76,000 multi-age birds of the flock were affected. Experimental infestations carried out on naive hens resulted in clinical signs similar to those diagnosed in naturally infested hens, such as generalized scaly dermatitis, presence of mucus-like material and yellowish crusts on the skin and around the calami, feather loss and strong unpleasant odor. About 30% drop of egg production was estimated. The possible source of infestation were wild birds identified on the ground and roofs of the sheds.