− | An infectious disease caused by the gram-negative coccobacilli[[Actinobacillus lignieresii]]. Characterised by inflammation of the soft tissues of the head especially the tongue and pharangeal lymph nodes of cattle and sheep. The Causal agent is widespread in the environment and gets into the [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] via small abrasions.It can be a progressive disease - low virulence but high persistence so animal may stop eating and eventually die if they are not treated. | + | An infectious disease caused by the gram-negative coccobacilli[[Actinobacillus lignieresii]]. Characterised by inflammation of the soft tissues of the head especially the [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] and [[Lymph Nodes - Anatomy & Physiology|pharangeal lymph nodes]] of cattle and sheep. The Causal agent is widespread in the environment and gets into the tongue via small abrasions. It can be a progressive disease - low virulence but high persistence so the animal may stop eating and eventually die if not treated. |