Diarrhoea can be caused by the bacteria Clostridium, a Gram-positive bacterium passed through the faeces from sow to piglet. This type of diarrhoea is often known as birth diarrhoea.
After weaning, when the piglets are no longer directly supported by antibodies from the sows’ milk, they become much more susceptible to E. coli and other enteric bacteria. Especially as their immune system is not fully developed. E. coli causes watery brown or greyish diarrhoea. E. coli is determined through laboratory analysis.
Furthermore, diarrhoea has other causes – Salmonella spp. and Lawsonia spp., are two of them – and non-enteric diarrhoea is another. A non-enteric form of diarrhoea may occur when introducing feed to the piglet. Compared to infectious diarrhoea, the stool will be much firmer and the piglet much more vital during the short period of non-enteric diarrhoea. When you add a fibrous piglet feed, you might come across non-complicated diarrhoea. This is because the fibres work as a feed for the beneficial bacterias in the piglet gut.