Avulavirus infections are veterinary medical conditions caused by Avulaviruses, a genus of viruses in the family Paramyxoviridae. These viruses are responsible for causing a variety of important diseases in birds and mammals, including Newcastle disease in birds and several different illnesses in humans, such as:

1. Madagascar pneumonia or meningopneumonitis (caused by Avulavirus serotype 12, also known as MAPV-12)
2. Tubular lung disease (caused by Avulavirus serotype 4, also known as A/turkey/England/50-92/91)

Avulavirus infections can lead to respiratory, gastrointestinal, and neurological symptoms in both birds and mammals. The severity of the disease depends on various factors, including the specific Avulavirus serotype involved, the host's age and immune status, and the route of infection.

In birds, Newcastle disease is a highly contagious and often fatal illness affecting domestic poultry and wild birds worldwide. It can cause severe economic losses in the poultry industry due to high mortality rates and trade restrictions.

In humans, Avulavirus infections are rare but have been associated with contact with infected birds or their droppings. The majority of human cases have been reported in Australia, although sporadic cases have also been documented in other countries. Human illnesses caused by Avulaviruses typically present as respiratory or neurological symptoms and can range from mild to severe, depending on the individual's age and overall health status.

Preventive measures for Avulavirus infections include maintaining good biosecurity practices, such as proper hand hygiene, wearing protective clothing, and limiting contact with potentially infected birds or their droppings. Vaccination is available for some Avulavirus serotypes and is widely used in the poultry industry to control Newcastle disease.

Avulavirus is a genus of viruses in the family Paramyxoviridae, order Mononegavirales. Avulaviruses are enveloped, negative-sense, single-stranded RNA viruses that primarily infect birds, causing various clinical manifestations such as respiratory, digestive, and reproductive diseases. Some avulaviruses have been associated with sporadic human infections, usually resulting in mild or asymptomatic illnesses. The most well-known avulavirus is the Newcastle disease virus (NDV), which can cause severe disease in birds and poses a significant threat to the poultry industry worldwide.