6,502
edits
Changes
Jump to navigation
Jump to search
→Diagnosis
==Diagnosis==
==Diagnosis==
Diagnosis is made on the basis of history, clinical signs and gross pathological lesions. In Britain, classical swine fever is notifiable to the local Animal Health Office. Following notification, the State Veterinary Service is responsible for visiting the suspect premises to confirm the diagnosis by laboratory testing.
===Clinical Signs===
===Clinical Signs===
The course of infection in older, breeding-age animals is often subclinical; however, CSFV is able to cross the placenta at any stage of pregnancy. The outcome of transplacental infection is highly dependent on the stage of gestation, and also virulence. During early pregnancy, transplacental CSFV infection may cause abortions, mummifications, congenital malformations or stillbirths. Infection occuring after 50-70 days gestation can lead to the birth of persistently viraemic piglets. These may appear clinically normal at birth, but grow poorly and occasionally show congenital tremor. Persistently infected piglets also shed virus until their inevitable death, acting as a reservoir for virus and making major contributions to the maintenance of infection in the population. It is therefore important to consider classical swine fever as a differential diagnosis of reduced fertility in addition to parvovirus, PRRS, leptospirosis and Aujeszky's disease.
The course of infection in older, breeding-age animals is often subclinical; however, CSFV is able to cross the placenta at any stage of pregnancy. The outcome of transplacental infection is highly dependent on the stage of gestation, and also virulence. During early pregnancy, transplacental CSFV infection may cause abortions, mummifications, congenital malformations or stillbirths. Infection occuring after 50-70 days gestation can lead to the birth of persistently viraemic piglets. These may appear clinically normal at birth, but grow poorly and occasionally show congenital tremor. Persistently infected piglets also shed virus until their inevitable death, acting as a reservoir for virus and making major contributions to the maintenance of infection in the population. It is therefore important to consider classical swine fever as a differential diagnosis of reduced fertility in addition to parvovirus, PRRS, leptospirosis and Aujeszky's disease.
===Pathology===
===Pathology===
The most common finding in cases of congenital classical swine fever is CNS pathology, particularly cerebellar hypoplasia.
The most common finding in cases of congenital classical swine fever is CNS pathology, particularly cerebellar hypoplasia.
===Laboratory Tests===
==Treatment==
==Treatment==