Marble Spleen Disease

Marble spleen disease msd is a contagious disease of confinement raised pheasants.

Marble spleen disease. Marble spleen disease is an acute respiratory disease of pheasants. Pheasants that have contracted this virus exhibit depression enlarged mottled spleens and lung congestion. Both diseases are caused by similar viruses. Grossly the lungs are heavily.

Described are the clinical and epizootiological aspects and the morphologicallesions in pheasants affected with the marble spleen disease at its firstoutbreaks. Marble spleen disease is caused by a type ii avian adenovirus. Marble spleen disease is an acute respiratory disease of pheasants characterized by depression enlarged mottled spleens pulmonary congestion and death. Have you found the page useful.

Stoĭkov d nikiforov i. The source of virus is unknown but there is easy lateral spread within flocks the virus surviving in frozen faeces for months and weeks in litter. The disease was found to run a peracute course with a 100 per centlethal effect. Msd is an acronym for marble spleen disease.

Species specific differences in clinical response are thought to be related to differences in the target organs for anaphylaxis and variation in viral pathotype. The type ii adenoviruses include marble spleen disease virus of. It has been a significant cause of mortality in many areas of the united states canada and europe during the last 30 years. A viral disease of turkeys similar to pheasant marble spleen disease caused by type ii adenovirus distinct from classical fowl adenovirus and occurring in most turkey producing areas.

Mortality rate reached 5 6 per cent the male birds being affectedmuch more rarely than the female ones up to 1 8 per cent. Msd means marble spleen disease. Infection leads to death. Marble spleen disease in pheasants marble spleen disease typically affects pheasants three to eight months of age.

The etiologic agent is a type ii avian adenovirus closely related tohemorrhagic enteritis virus of turkeys and splenomegaly virus of chickens. Marble spleen disease msd is a contagious disease of captive reared ring neckedpheasants phasianus colchicus characterized by variable mortality and highmorbidity. Marble spleen disease msd is also another viral disease of adult gamebirds that causes sudden death and is caused by a siadenovirus formerly group ii adenovirus. Both diseases are caused by similar viruses.

The virulence of the virus varies but morbidity may be 100 and mortality 10 60. Infection typically occurs when birds ingest the virus which is often introduced to a flock through contaminated clothing or equipment. These can vary from bleeding gums petechiae bruises that occur spontaneously and easily on the skin prolonged menstrual periods and heavy on the female.