tetano
Editor, Senior Moderator
Transbound Emerg Dis. 2013 Mar 11. doi: 10.1111/tbed.12071. [Epub ahead of print]
Risk Factors for Highly Pathogenic Avian Influenza in Commercial Layer Chicken Farms in Bangladesh During 2011.
Osmani MG, Thornton RN, Dhand NK, Hoque MA, Milon SM, Kalam MA, Hossain M, Yamage M.
Source
Epidemiology Unit, Department of Livestock Services, Krishi Khamar Sharak, Farmgate, Dhaka, Bangladesh.
Abstract
A case-control study conducted during 2011 involved 90 randomly selected commercial layer farms infected with highly pathogenic avian influenza type A subtype H5N1 (HPAI) and 175 control farms randomly selected from within 5 km of infected farms. A questionnaire was designed to obtain information about potential risk factors for contracting HPAI and was administered to farm owners or managers. Logistic regression analyses were conducted to identify significant risk factors. A total of 20 of 43 risk factors for contracting HPAI were identified after univariable logistic regression analysis. A multivariable logistic regression model was derived by forward stepwise selection. Both unmatched and matched analyses were performed. The key risk factors identified were numbers of staff, frequency of veterinary visits, presence of village chickens roaming on the farm and staff trading birds. Aggregating these findings with those from other studies resulted in a list of 16 key risk factors identified in Bangladesh. Most of these related to biosecurity. It is considered feasible for Bangladesh to achieve a very low incidence of HPAI. Using the cumulative list of risk factors to enhance biosecurity pertaining to commercial farms would facilitate this objective.
? 2013 Blackwell Verlag GmbH.
PMID:
23480200
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23480200
Risk Factors for Highly Pathogenic Avian Influenza in Commercial Layer Chicken Farms in Bangladesh During 2011.
Osmani MG, Thornton RN, Dhand NK, Hoque MA, Milon SM, Kalam MA, Hossain M, Yamage M.
Source
Epidemiology Unit, Department of Livestock Services, Krishi Khamar Sharak, Farmgate, Dhaka, Bangladesh.
Abstract
A case-control study conducted during 2011 involved 90 randomly selected commercial layer farms infected with highly pathogenic avian influenza type A subtype H5N1 (HPAI) and 175 control farms randomly selected from within 5 km of infected farms. A questionnaire was designed to obtain information about potential risk factors for contracting HPAI and was administered to farm owners or managers. Logistic regression analyses were conducted to identify significant risk factors. A total of 20 of 43 risk factors for contracting HPAI were identified after univariable logistic regression analysis. A multivariable logistic regression model was derived by forward stepwise selection. Both unmatched and matched analyses were performed. The key risk factors identified were numbers of staff, frequency of veterinary visits, presence of village chickens roaming on the farm and staff trading birds. Aggregating these findings with those from other studies resulted in a list of 16 key risk factors identified in Bangladesh. Most of these related to biosecurity. It is considered feasible for Bangladesh to achieve a very low incidence of HPAI. Using the cumulative list of risk factors to enhance biosecurity pertaining to commercial farms would facilitate this objective.
? 2013 Blackwell Verlag GmbH.
PMID:
23480200
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23480200