Week of 19-May-2017
A dry white deposit is evident on the mucosal surface of the vulva of a sow served 25 days previously. What is it and what is its significance?
The deposit is precipitated calcium carbonate or chalk which is derived from the urine. Calcium deposits in the bladder of sows are common particulaly in areas with high calcium salt content in water supplies (hard water) and periodically will be flushed out during urination and deposit on the vulval lips as a dry powder. In itself it is of no pathological significance and is not associated with pregnancy failure; if excessive buildup occurs in the bladder this can cause inflammation and act as a trigger for cystitis or even ascending pyelonephritis particularly in sows that are confined or generally inactive. Increasing water availability and encouraging more frequent urination will improve flushing and reduce such build up. In extremes water filtration/sedimentation systems may be needed.
It can be confused with a drying purulent vulval discharge arising from bacterial infection of the vagina, cervix or uterus but in such cases there is likely to be loss of pregnacy and return to service.
Flow back of semen is common post service but would not be evident beyond 48h post mating/insemination.
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?