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An experimental study on broiler chicken co-infected with the specimens containing avian influenza (H9 subtype) and infectious bronchitis (4/91 strain) viruses | ||
| Iranian Journal of Veterinary Research | ||
| مقاله 9، دوره 13، شماره 2 - شماره پیاپی 39، 2012، صفحه 138-142 اصل مقاله (147.72 K) | ||
| نوع مقاله: Short paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijvr.2012.114 | ||
| نویسندگان | ||
| S. Seifi1؛ K. Asasi* 2؛ A. Mohammadi3 | ||
| 1Graduated from School of Veterinary Medicine, Shiraz University, Shiraz, Iran | ||
| 2Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran | ||
| 3Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran | ||
| چکیده | ||
| This experimental study was carried out to induce a co-infection of H9 AIV and IBV with inoculums prepared from tracheal scrubbed epithelium tissues in natural co-infected birds to rule out the effect of field undesired environmental conditions and also other infectious causative agents. Eighty 1-day-old broilers were randomly divided into four equal groups. At 21 days of age, three test groups were inoculated intranasally with prepared inoculums containing IBV and H9 AIV alone and a co-infected group. The fourth group remained uninfected as a control group. The results showed that experimental co-infection of AIV and IBV increased the severity of clinical signs, mortality rate and gross lesions. The HI titer against AIV infection in the co-infected group was significantly higher than the HI titer of other groups, which may indicate that IBV could promote the propagation of H9N2 AIV or stimulate the immune response. | ||
| کلیدواژهها | ||
| Avian influenza virus؛ Infectious bronchitis virus؛ Co-infection | ||
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