ˆ˙ ˇ ˝ˇ ˛ ˚ˇ ˜ ˆ˙ ! ˇ€¦ · pathology of experimental C. baileyi infection in chicks....

7
) ( Cryptosporidium baileyi ) ( Cryptosporidium baileyi . % . C. baileyi . . . . . . Experimental histopathological study of chicks infected with Cryptosporidium baileyi isolated from wild pigeons in Mosul S. S. Al-Mahmood Department of Pathology and Poultry Diseases, College of Veterinary Medicine, University of Mosul, Mosul, Iraq mail: - e [email protected] Abstract The aim of this study was to investigate naturally occurring cryptosporidiosis in pigeons in Mosul city as well as the pathology of experimental C. baileyi infection in chicks. Prevalence of the naturally occurring cryptosporidiosis in the pigeons was 30% according to morphological features of the isolated oocysts and distribution of the lesions of the experimental infection in chicks, the cryptosporidium was diagnosed as C. baileyi. Using a dose of 1000 oocysts, the infection was induced in chikens. Oocysts shedding was noted in the infected chickens at the 7 th post – infection (p.i.) day and increased till the 15 th p.i. day. Infected chicks showed dullness and anorexia. Microscopically p.i. day 7, there were necrosis of the tips of some of the intestinal villi, mucinous degeneration of the intestinal mucosa, and the presence of large numbers of the parasite in the tips of the intestinal villi. On p.i. day 10, necrosis of the tips of the villi was more extensive and the necrotic cells were sloughed into the lumen and accumulated as debris. Inflammatory mononuclear cells were seen infiltrating the various layers of the intestine. Similar but more extensive lesions were seen on p.i. day 15. Available online at http://www.vetmedmosul.org/ijvs

Transcript of ˆ˙ ˇ ˝ˇ ˛ ˚ˇ ˜ ˆ˙ ! ˇ€¦ · pathology of experimental C. baileyi infection in chicks....

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Experimental histopathological study of chicks infected with Cryptosporidium baileyi

isolated from wild pigeons in Mosul

S. S. Al-Mahmood

Department of Pathology and Poultry Diseases, College of Veterinary Medicine, University of Mosul, Mosul, Iraq

mail:-e [email protected]

Abstract

The aim of this study was to investigate naturally occurring cryptosporidiosis in pigeons in Mosul city as well as the

pathology of experimental C. baileyi infection in chicks. Prevalence of the naturally occurring cryptosporidiosis in the pigeons

was 30% according to morphological features of the isolated oocysts and distribution of the lesions of the experimental

infection in chicks, the cryptosporidium was diagnosed as C. baileyi. Using a dose of 1000 oocysts, the infection was induced

in chikens. Oocysts shedding was noted in the infected chickens at the 7th post – infection (p.i.) day and increased till the 15

th

p.i. day. Infected chicks showed dullness and anorexia. Microscopically p.i. day 7, there were necrosis of the tips of some of

the intestinal villi, mucinous degeneration of the intestinal mucosa, and the presence of large numbers of the parasite in the tips

of the intestinal villi. On p.i. day 10, necrosis of the tips of the villi was more extensive and the necrotic cells were sloughed

into the lumen and accumulated as debris. Inflammatory mononuclear cells were seen infiltrating the various layers of the

intestine. Similar but more extensive lesions were seen on p.i. day 15.

Available online at http://www.vetmedmosul.org/ijvs

Page 2: ˆ˙ ˇ ˝ˇ ˛ ˚ˇ ˜ ˆ˙ ! ˇ€¦ · pathology of experimental C. baileyi infection in chicks. Prevalence of the naturally occurring cryptosporidiosis in the pigeons was 30%

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