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Breast Blisters in Poultry

By

Frederic J. Hoerr

, DVM, PhD, Veterinary Diagnostic Pathology, LLC

Last full review/revision Mar 2014 | Content last modified Jun 2016
Topic Resources

In chickens and turkeys, a bursa lined with synovial membrane is normally present over the anterior projection of the keel bone. When this bursa becomes inflamed by trauma or infection, fluid accumulates and appears as a fluid-filled blister 1–3 cm in diameter. Factors in trauma to the bursa include poor feathering, hard flooring, and leg weakness, which is associated with increased time of sitting on the keel (sternum). Coarse bedding materials or wet litter conditions are predisposing factors and should be corrected when identified. Infectious causes of sternal bursitis include Mycoplasma synoviae, Staphylococcus, and Pasteurella spp, either from local trauma (Staphylococcus) or as an extension of a systemic infection.

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Salmonellosis
Salmonella infections in poultry occur worldwide. A few Salmonella species are highly host-adapted, whereas others are able to infect a wide range of living creatures. Which of the following Salmonella species is highly adapted to chickens and turkeys?
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