Original scientific paper

Assessment of predisposing effect of coccidiosis to necrotic enteritis in experimentally induced broiler chicken.

Soundarapandian Sivaseelan ; Department of Veterinary Pathology, Veterinary College and Research Institute, Namakkal, Tamil Nadu, India
Subramanian Vijayakumar ; Department of Veterinary Pathology, Veterinary College and Research Institute, Namakkal, Tamil Nadu, India
Shanmugasamy Malmarugan ; Department of Veterinary Pathology, Veterinary College and Research Institute, Namakkal, Tamil Nadu, India
Perumal Balachandran ; Department of Veterinary Pathology, Veterinary College and Research Institute, Namakkal, Tamil Nadu, India
Gurusamipalayam A. Balasubramaniam ; Department of Veterinary Pathology, Veterinary College and Research Institute, Namakkal, Tamil Nadu, India

Abstract

In order to asses the predisposing effect of coccidiosis to Necrotic enteritis (NE), an experimental study was conducted in broiler chicken. In the first trial (NE alone), symptoms were noticed from the 4th to 7th days post inoculation (DPI), but no mortality was recorded. In the second trial (NE primed with coccidiosis), 23 % mortality was recorded. Grossly, a maximum intestine lesions score of 2 was recorded on the 6th DPI in the first trial. In the second trial, a maximum intestine lesions score of 3.67 was recorded on the 6th DPI. Microscopically, in the first trial, the birds’ intestines from the 4th to the 7th DPI showed hyperplasia of the villi of the jejunal mucosa. In the second trial, the birds’ intestines from 2nd to 4th DPI showed severe hyperplasia of the villi, and the presence of E. necatrix schizonts within and outside the enterocytes. In the second trial, intestines from 5th to 7th DPI revealed shortening of the villi, diphtheritic pseudomembrane formation and the presence of C. perfringens organisms among the necrotic epithelium. It was concluded that intestinal damage characterised by destruction of crypts cells, as well as villi enterocytes and rupture of blood vessels by schizonts and merozoites of E. necatrix predisposed the chicken to a clinical form of NE to increase the mortality percentage.

Keywords

necrotic enteritis; coccidiosis; experimental study; chicken

Hrčak ID:

111887

URI

https://hrcak.srce.hr/111887

Publication date:

9.12.2013.

Article data in other languages: croatian

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