Figure 1

Lesions observed at post-mortem examination. A Chronic perihepatitis. The bird had multiple chronic lesions consistent with polyserositis, e.g., opaque and thickened thoracic air sacs, chronic adhesive pericarditis, and numerous adhesions between several parts of the intestines, the mesovarium and salpinx. The ovary of the hen was inactive. B Deposition of urate in the conjunctiva of a hen. Throughout the coelomic cavity and major joints urate deposition was present. The ureters were occluded  by urate and the kidneys were swollen and showed an increased tubular pattern. The ovary was in regression and no egg was present within the oviduct. C Massive cystic enlargement of the oviduct containing fluid with lumps of fibrinopurulent exudate. The ovary was inactive and the remaining coelomic organs were all cranially displaced. D A massive skin laceration with a caudolaterodorsal location consistent with a mating injury. Externally, the wound measured approximately 9 × 5 cm, with multiple internal pockets with presence of necrotic tissue, fibrinopurulent material and bedding. E Fibrinopurulent exudate extending from the wound in D. The hen was not in lay , and the ovary had completely regressed. F A lesion similar to D–E with fibrinopurulent cellulitis extending from the caudodorsal part of the bird to cranial part of the leg. The external measurement of the wound was approximately 5 × 8 cm. The bird was not in lay , and the ovary was in regression with a few atretic follicles present. Fibrinopurulent peritonitis was present. G Purulent peritonitis in a young chicken. The yolk sac appeared grossly normal though a “button” was present in the unhealed umbilicus, and the yolk sac and liver yielded pure growth of E. coli. H Hyperaemia of the yolk sac which contained a partly inspissated content (yolksacculitis). The umbilical area was hyperaemic (omphalitis) extending to the abdominal wall, fibrinous pericarditis and perihepatitis was present as well as fibrinopurulent airsacculitis and peritonitis. I Ulcus ventriculi in a young chicken adjacent to the gastric isthmus.