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?
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 17-Nov-2017
This is a pig with a swollen abdomen. What is the most likely cause of this lesion?
Week of 10-Nov-2017
After an increase of sudden deaths in growing and finishing pigs, lesions like this are detected. What is the most likely cause?
Week of 03-Nov-2017
There is an increase of ill thrift and laboured abdominal breathing in the weaners. There is poor response to antimicrobial treatment. Mortality ranges from 4 to 30%. What is the most likely cause of this lesion?
Week of 27-Oct-2017
This is a newly born piglet that cannot stand on its feet for walking. What is the most likely cause of this lesion?
Week of 20-Oct-2017
There is scour, ill thrift and high mortality during the first 8 weeks post-weaning. All post-mortemed pigs had the same gross lesions, as the one seen in the picture. What is the most likely cause of this lesion?
Week of 13-Oct-2017
The unit has an increase of coughing and poor growth rates. What is the most likely cause of this lesion?
Week of 06-Oct-2017
There is an increase of ill thrift and laboured abdominal breathing in the weaners. There were poor response to antimicrobial treatment. Mortality ranges from 6 to 15%. What is the most likely cause of this lesion?