Parasitic disease is consistently one of the most frequent causes of post-mortem diagnostic in the Regional Veterinary Laboratories. In addition, faecal samples are submitted to the labs for parasitological examination.The majority of these samples come from herds or flocks where animals were showing clinical signs of diarrhoea and/or weight loss. Fasciola hepatic (Fasciolosis), Strongyles (Parasitic Gastro-Enteritis) and Dictocaulus viviparus (Parasitic pneumonia) are the most important organisms responsible of parasitic disease in cattle and sheep.