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Significance of Duck in the Transmission of Avian Influenza Virus

Md. Zohorul Islam
Department of Microbiology, Chittagong Veterinary and Animal Sciences University, Khulshi-4202

Shahana Ahmed
Department of Animal Science and animal Nutrition, Chittagong Veterinary and Animal Sciences University, Khulshi-4202

Shahneaz Ali Khan
Department of Physiology, Biochemistry and Pharmacology, Chittagong Veterinary and Animal Sciences University, Khulshi-4202

Mohammad Belayet Hossain
Department of Physiology, Biochemistry and Pharmacology, Chittagong Veterinary and Animal Sciences University, Khulshi-4202

Abstract/ Executive Summary:

The prevalence of AIV in ducks was 6.67% in Ahmedabad union, 13.33% in Borotara union, 0% in Punot and Matrai unions and 6.67% in Bomboo union. However, the overall prevalence of the virus was found to be 5.33%, which showed a significant difference among the villages under study (P<0.001). The AIV was detected in the native ducks though there were no apparent clinical signs. It is known that the viruses multiply in the respiratory and gastrointestinal tracts and are shed through respiratory secretions and faeces prior to development of any clinical signs. This might be that the ducks were exposed to natural infections with low virulent AIV, as wild and domestic ducks are potent carriers of the virus.

Keywords: Duck, Transmission, Avian influenza virus

Location: Department of Microbiology, Chittagong Veterinary and Animal Sciences University, Khulshi

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Poultry

Objectives:

The objective of the present study was to detect the presence of AIV in domestic ducks in Joypurhat, Bangladesh.

Methodology:

Sampling: The present study work was conducted at Kalai and Khetlal Upazilla under Joypurhat District, Bangladesh. A total of 75 cloacal swabs were collected from native ducks in 5 Unions. From each union 15 samples were collected randomly from 25 villages. Detection of AIV antigen by Chromatographic immunoassay: Sample was directly collected from cloaca of ducks by the insertion of swabs. After collecting cloacal samples, each swab was inserted into a sample tube containing assay diluents and mixed until the sample dissolved in the diluents. The tube was then left until the large particles settled down in the bottom of the tube. Then five drops of supernatant were taken by a disposable dropper and added to the sample holes on the test device. As the test begins to work, purple colour will move across the result window in the centre of the test device and the interpretation of the results at 30 minutes in comparison with positive control according to the kit manufacturer’s instructions. Positive result indicated presence of AIV antigen type A only. Statistical analysis: The data were analyzed by one-way ANOVA. Values were expressed in mean ± SD. The statistical analyses were performed using SPSS (Ver.11.5) for Windows.

Source of Information: Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 77-79 ISSN 1023-6104

Article Link (Online Journal): http://journals.sfu.ca/bd/index.php/UJZRU

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The overall prevalence of the virus was found to be 5.33%, which showed a significant difference among the villages under study (P<0.001).

Knowledge Management: Journal