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?
The incised lesion shown is typical of a long standing infection with Actinobacillus pleuropneumoniae (App) infection in the diaphragmatic lobes of the lung. Pleural tags will be evident above the lesion.10% prevalence in weekly batches suggests enzootic disease within the herd and it is likely that it will be acting to limit performance and be part of a wider respiratory picture. Pleurisy levels at slaughter will also tend to be high with implications for trimming and carcass rejection.
Pasturella and Trueperella are both capable of producing abscessation in lungs but are typically secondary pathogens causing wet abcesses with lower prevalence. They are not typically associated with overlying localised pleurisy.
These dry lesions can surprisingly often yield cultures of App confirming the diagnosis.
Control of such disease at a herd level is best achieved by vaccination of young growing pigs either with a polyvalent commercial vaccine or using an autogenous vaccine derived from one or more isolates from the affected pigs.
Long term use of antibiotics to control chronic App infection on farm is no longer regarded as an acceptable option.
Week of 23-Feb-2018
Sudden death in 6 – 8 weeks old weaner pigs. Carcasses are pale. There is haemorrhagic abdominal fluid with clotted blood strands and hepatic rupture. Excess of fluid in the thorax. Heart and muscles are pale. What is the most likely cause?
Week of 16-Feb-2018
This pig had a good body condition, was anaemic and died suddenly. The intestinal content is dark black. What is the most likely cause?
Week of 09-Feb-2018
This sow has reddening of skin and considerable pain. What is the most likely cause of this lesion?
Week of 02-Feb-2018
This pig had a good body condition, was anaemic and died suddenly. The stomach had a dark black content inside.
Week of 26-Jan-2018
Necrotic lesions in the feet of a weaner pig. What is the most likely cause of this lesion?
Week of 19-Jan-2018
Some pigs have swollen ears and walk with their heads tilted to one side. What is the most likely cause of this lesion?
Week of 12-Jan-2018
There is scour, ill thrift and high mortality during the first 4 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 05-Jan-2018
Small intestine opened during a routine check in the slaughterhouse: what can we see?