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 22-Sep-2017

What is the likely cause of this lesion seen in >10% of lungs in slaughter pigs each week from a breeder feeder farm?

Week of 15-Sep-2017

The ulcer shown is in the preputial diverticulum of an adult boar culled due to persistent haemorrhage in the ejaculate. What is the likely cause?

Week of 08-Sep-2017

This non-fatal scour is seen in piglets from 10 days of age. What is the most likely primary cause?

Week of 25-Aug-2017

What is the cause of the liver lesion in this heavily pregnant sow found dead?

Week of 21-Aug-2017

Is there anything strange about any of the pigs in the photo?

Week of 11-Aug-2017

This 6-week-old pig has non-pruritic lesions on the skin. What can it be?

Week of 07-Aug-2017

What is the most likey cause of the lesion seen in a single 10 day old piglet on an outdoor pig unit in January?

Week of 31-Jul-2017

A first parity weaned sow can not hold her weight. It shows poor response to antibiotics and NSAIDS. What is the most likely cause of this lesion?

Week of 21-Jul-2017

What is the most likely cause of this condition?