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This work is an epidemiological study of case control, evaluating 128 broiler chickens, between 40 and 48 days old, under sanitary inspection, vaccinated against the DIB in the 14 th day of age (through drinking water). The case group consists of 68 broiler chickens with celulitis and the control group consists of 60 healthy animals. The bursals, when collected, were measured in bursometer and registered in accordance with its scale. After the macroscospic examination were collected skin fragments, both injured and not injured, as well as bursal fragments, fixed with 10% phormol, in order to finish the histopathology, and also for the and processing by the established techniques, as well as included in paraffin and stained with hematoxilin and eosin, at the Pathological Anatomy Service Professor Jefferson Andrade dos Santos (UFF). A score has been created for the histophatological analysis of the injuries with the following criteria: score 0 - without injury; score 1 - discrete hyperplasia and lymphoid follicles rarefaction; score 2 - edema, inflammatory infiltrate, follicle necrosis, severe lymphoid rarefaction and follicle discrete atrophy; 3 - presence of epithelial and follicle cysts, severe follicle atrophy and fibrosis. The statistical analysis was made with the Quisquare Kruskall-Wallys tests and Linear Regression. The bursometer analysis has demonstrated that: in case group- 28 broiler chickens with burse the diameter 10 mm (size 3); 37, with diameter 13 mm (size 4); three, with diameter 16 mm (size 5); and in control group ‐ 26 broiler chickens with burse the diameter 10 mm (size 3); 31, with diameter 13 mm (size 4); tres, three with diameter 16 mm (size 5). Through microscopical analysis we registered 1 bursal with score 0; 3 with score 1; 25 with score 2; and 99 with score 3. There was statistical difference (p£ 0.05) between the case and control groups in relation to the diameter and to the scores of bursal injuries that we had obtained. Yellowish injuries under the skin in plaque in the subcutaneous of broiler chickens must be considered as cellulitis and a criterion of the carcass condemnation and favored by the presence of more serious injuries (score 3) in the bursal.

Celulite associada às lesões na bolsa de Fabrício de frangos de corte ao abate, sob inspeção sanitária