RESUMO
Cryptosporidiosis is considered an infection with impact on animal health. It has been associated with high morbidity and mortality rates, leading to significant economic losses to the poultry industry. This study investigated the presence of Cryptosporidium spp. in domestic ducks of family Anatidae (Cairina moschata) from two rustic commercial aviaries located in the city of Rio de Janeiro, Brazil. A total of 315 fecal samples were collected from domestic ducks in two different areas (N=186 in area A and N=129 in area B). The microscopic analysis was conducted using a sugar centrifugal flotation technique for the identification of Cryptosporidium spp. oocysts, followed by PCR/sequencing analyses of the partial sequence of the 18S rDNA gene to determine the Cryptosporidium species. Of the 315 samples collected, only 10 (186/5.38%) from area A were positive for Cryptosporidium. The nucleotide sequence and phylogenetic analyses identified that all samples were identical (100%) and belonged to Cryptosporidium baileyi species, which is closely related to gastric species and of importance in animal health.
Criptosporidiose é considerada uma infeção com impacto na saúde animal. Tem sido associada a altas taxas de morbidade e mortalidade, levando a perdas econômicas significativas para a indústria avícola. Este estudo teve como objetivo investigar a presença de Cryptosporidium spp. em patos domésticos da família Anatidae (Cairina moschata) de dois aviários comerciais rústicos localizados na cidade do Rio de Janeiro, Brasil. Um total de 315 amostras fecais foram coletadas de patos domésticos em duas áreas (Área A / n= 186; Área B / n= 129). Amostras fecais foram processadas e utilizando a técnica de centrífuga e flutuação em solução saturada de açúcar para a identificação de oocistos de Cryptosporidium spp. através da observação microscópica. Naquelas amostras positivas, procedeu-se com o diagnóstico molecular para determinação de espécie de Cryptosporidium. Das 315 amostras coletadas, apenas 10 (186 / 5,38%) da área A foram positivas para Cryptosporidium. A sequência de nucleotídeos e as análises filogenéticas identificaram que todas as amostras eram idênticas (100%) e pertenciam à espécie Cryptosporidium baileyi, intimamente relacionada às espécies gástricas e de importância na saúde animal.
Assuntos
Animais , Doenças das Aves Domésticas/parasitologia , Criptosporidiose/genética , Oocistos/isolamento & purificação , PatosRESUMO
Cryptosporidiosis in birds manifests as an acute or chronic disease of the respiratory or digestive tracts. The objective of our study was to perform the molecular characterization of Cryptosporidium spp. in wild psittacines kept in captivity at the Araçatuba Municipal Zoo, São Paulo, Brazil. A total of 47 fecal samples were collected from Amazona aestiva, Psittacara leucophthalma, and Ara ararauna. All samples were collected at the time the birds defecated. DNA extraction was performed using the ZR Fecal DNA MiniPrep™ kit (Zymo Research). Screening for Cryptosporidium spp. was accomplished using nested PCR targeting the 18S RNA gene and sequencing of amplified fragments. Positivity for Cryptosporidium spp. (10.64%; 5/47) was found in A. ararauna (4) and P. leucophthalma (1) samples. The amplified fragments were sequenced and showed 100% genetic similarity with Cryptosporidium baileyi.