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 20-Apr-2018

These piglets died within 24 hours after injecting dextran iron in the leg at 2 days old. What is the cause of this condition?

Week of 13-Apr-2018

The weaner pig on the left is pale when compared with a normal weaner on the right. These pale pigs are slow growing. What is the cause of the problem in this case?

Week of 06-Apr-2018

These piglets are stunt with distended abdomens. The perineal area in these pigs is abnormal at inspection. What is the cause of this condition?

Week of 29-Mar-2018

This pregnant sow is constantly biting the bar above the feeder. What is the most likely cause of this condition?

Week of 22-Mar-2018

This sow has large brown scales on the skin over the back. What is the cause of this condition?

Week of 16-Mar-2018

This gilt is pale and has a bloody diarrhoea. What is the cause of this condition?

Week of 09-Mar-2018

Multiple lung abscessation (Pyaemia) is detected when doing a post-mortem in a finishing pig. What is the cause of this lesion?

Week of 02-Mar-2018

There is an increase of regular and irregular returns in the breeding herd accompanied by abortions, stillborns and mummified piglets. All parities are affected. What is the cause of abortion in this picture?

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?