Week of 01-Sep-2017

Which infectious disease is the most likely cause of the haemorrhages visible on the serosal surfaces of this growing pig which was found dead?



Correct answer

Haemorrhagic lesions within a carcass should always raise suspicion of Classical or African Swine Fever (which are pathologically indistinguishable) as would multiple sudden deaths. As well as occuring on serosal surfaces, haemorrhagic lesions are seen in lymphatic tissue —especially the spleen, lymph nodes and tonsils— and parenchymatous tissues. Skin lesions suggestive of septicaemia may also be evident. In more chronic cases button ulcers may be present in the mucosa of the large intestine following a period of high fever prior to death. Reproductive failure in the form of abortion can occur as well as nervous,enteric and respiratory disease in any age pig.

The clinical and epidemiological picture can be useful to differentiate PDNS the pathology of which can suggest haemorrhagic disease. Illness affecting a wide age range of animals would suggest ASF/CSF. If there is any doubt ASF/CSF suspicion should be notified and investigated.

African Swine Fever —against which there is no vaccine— has become widespread in eastern Europe following its initial incursion via Georgia in 2007 and subsequent spread through Russia. It now represents a very real threat to all European pig populations especially where biosecurity lapses occur and wild boar populations are prevalent.

Week of 24-May-2018

A weaner pig is laying on its side unable to walk, making paddling movements, eyes rolling and with opisthotonus. What is the cause of the problem in this case?

Week of 17-May-2018

A batch of finishing pigs is presented to the slaughterhouse with skin lesions around the perineal area and lower body parts. What is the cause of this lesion?

Week of 10-May-2018

A heavily pregant sow is found in the pen with blood in the vulva. What is the cause of it?

Week of 03-May-2018

A first parity sow is weaned and is lame in the hindleg. There is poor response to treatment with antibiotics and NSAIDS. Separation of the head of the femur has occurred through the growth plate at post-motem. What is the cause of this condition?

Week of 27-Apr-2018

Pigs around 15 weeks old develop purple patches over the hindquarters extending to all over the body. Mortality is high. What is the cause of this lesion?

Week of 20-Apr-2018

These piglets died within 24 hours after injecting dextran iron in the leg at 2 days old. What is the cause of this condition?

Week of 13-Apr-2018

The weaner pig on the left is pale when compared with a normal weaner on the right. These pale pigs are slow growing. What is the cause of the problem in this case?

Week of 06-Apr-2018

These piglets are stunt with distended abdomens. The perineal area in these pigs is abnormal at inspection. What is the cause of this condition?

Week of 29-Mar-2018

This pregnant sow is constantly biting the bar above the feeder. What is the most likely cause of this condition?