Avian Dis.: Backyard chicken flocks pose a disease risk for neotropic birds in Costa Rica.
|Article Type:||Brief article|
Birds (Health aspects)
Diseases (United States)
Diseases (Risk factors)
|Publication:||Name: Journal of Avian Medicine and Surgery Publisher: Association of Avian Veterinarians Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2009 Association of Avian Veterinarians ISSN: 1082-6742|
|Issue:||Date: June, 2009 Source Volume: 23 Source Issue: 2|
|Topic:||Event Code: 310 Science & research|
|Geographic:||Geographic Scope: United States Geographic Code: 1USA United States|
Pathogens of free-ranging chickens create a risk of disease for
wild birds, some of which migrate to the United States, as well as
potential economic losses for resource-poor farmers. Free-roaming
backyard chickens are commonly kept in shade-grown coffee plantations,
habitats that attract large numbers of wild birds. The husbandry and
pathogen prevalence of backyard chicken flocks in San Luis, Costa Rica,
were investigated. Based on serologic evidence, Newcastle disease virus,
infectious laryngotracheitis virus, infectious bronchitis virus, chicken
anemia virus, and infectious bursal disease virus, as well as both
Mycoplasma gallisepticum and Mycoplasma synoviae appear to be
significant diseases of this population, and thus, we consider these
backyard chickens potential reservoirs for these diseases. There was no
evidence of avian influenza. Interviews, clinical examinations, and
microscopic examination of tissues led us to believe that poxvirus is
also a significant cause of morbidity and mortality in these chickens.
We found that Escherichia coli isolates were resistant against
tilmicosin, tetracycline, ampicillin, amoxicillin with clavulanic acid,
ticarcillin, and cephalothin, and contained genes considered responsible
for conferring tetracycline resistance. In addition, although production
was not measured, we suspect that husbandry and lack of preventative
medicine are directly related to the diseases reported, all of which
negatively affect production.
et al. 2008;52:558-566.
|Gale Copyright:||Copyright 2009 Gale, Cengage Learning. All rights reserved.|