Abstract
ABSTRACT: 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.
Highlights
The order Anseriformes, family Anatidae, which comprises birds such as ducks, geese and swans, presents cosmopolitan distribution (FIGUEROLA & GREEN, 2006)
C. baileyi can establish infection in the epithelial cells of the respiratory tract, causing clinical respiratory disorders in chickens, turkeys, and ducks (CURRENT et al, 1986; RYAN, 2010; GOODWIN et al, 1996; MOLINA-LOPEZ et al.; 2010; WANG et al, 2010). These infections are often associated with high morbidity and mortality, especially in broilers (RYAN, 2010), leading to significant economic losses to the poultry industry (ABBASSI et al, 1999, BLAGBURN et al, 1990, GOODWIN & BROWN, 1989)
After analysis of 315 fecal samples, only animals from area A tested positive for Cryptosporidium spp., with 10 parasitized birds of 186 (5,4 %)
Summary
The order Anseriformes, family Anatidae, which comprises birds such as ducks, geese and swans, presents cosmopolitan distribution (FIGUEROLA & GREEN, 2006). C. baileyi can establish infection in the epithelial cells of the respiratory tract, causing clinical respiratory disorders in chickens, turkeys, and ducks (CURRENT et al, 1986; RYAN, 2010; GOODWIN et al, 1996; MOLINA-LOPEZ et al.; 2010; WANG et al, 2010). These infections are often associated with high morbidity and mortality, especially in broilers (RYAN, 2010), leading to significant economic losses to the poultry industry (ABBASSI et al, 1999, BLAGBURN et al, 1990, GOODWIN & BROWN, 1989). No effective measures or treatments have been taken or developed to prevent infection by C. baileyi to date, which may develop in association with of stress from various causes, with presence of concomitant diseases, as well as several immunodeficiency conditions (SRÉTER & VARGA, 2000)
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