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?



incorrect answer

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 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 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?

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?