Abstract
Abstract As the human population and tourism increase in the Galapagos Islands, increased poultry production raises risks of pathogen spillover into native avian populations. Here, we characterize the disease risks to Galapagos avifauna of different types of poultry farming by comparing health status and serosurvey results between broiler and backyard chickens (Gallus gallus domesticus). Backyard chickens were more frequently diseased than broilers, and were more likely to be seropositive for several pathogens (Mycoplasma gallisepticum, infectious laryngotracheitis virus, infectious bronchitis virus, avian reovirus, and Marek's disease virus). Seroprevalence for other pathogens (avian paramyxovirus-1, infectious bursal disease, avian encephalomyelitis virus, and avian adenovirus) was relatively high among all chickens. Preliminary serological results from wild birds revealed no evidence of previous exposure to these diseases, which suggests that transmission of disease from poultry to wildlife is currentl...
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