Occurrence and pathology of intracutaneous cornifying epitheliomas in Mastomys natalensis, the multimammate mouse.

Twelve mastomys (Mastomys natalensis) about two years old developed several raised, varying sized, multiple scurfy growths on most of the external parts of the body over a period of two months. No metastatic lesions were observed in the internal organs at necropsy. Histological examination of the cutaneous lesions revealed that the growths were comprised of intracutaneous cornifying epitheliomas.

Sequential pathology of genital tract in chickens experimentally infected with Mycoplasma gallisepticum.

Unsexed day-old White Leghorn chicks hatched from eggs pre-treated with erythromycin were infected via the yolk sac with a 48-hr broth culture of pathogenic Mycoplasma gallisepticum (S6). Fourteen of the 57 experimental female birds had gross lesions in the oviduct, characterized by the presence of grayish-white caseous plugs of various sizes in a segment or throughout the length of the oviduct. Forty-six of the infected female birds had microscopic lesions, detected primarily as mild heterophilic infiltration, lymphocytic aggregates, lymphoid follicles, diffuse lymphocytic infiltration, pleocellular response, or a combination of any of these depending on the stage and extent of infection.

Phycomycotic gastritis in buffalo calves (Bubalis bubalis).

Mycotic gastritis, primarily caused by Rhizopus sp. was seen in six buffalo calves (7-13 days old) at postmortem examination. The predominant lesions were numerous raised ulcers in which were hyphae of Rhizopus.