Changes

==Description==

==Description==

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.  

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.

Usually due to direct penetration into tongue of cattle

*In cattle - very widespread in world, but rather sporadic, less common now than it was.

A diagnosis can be made on history and clinical signs.  

====Clinical====

====Clinical====

*Seen in youngish animals in beef breed, especially sucklers on poor forage.  

   

*Starts like [[Picornaviridae#Foot and Mouth Disease Virus|foot and mouth disease]] - dull, salivating (if only one animal is unlikely to foot and mouth). - nearly always sporadic.

*Starts like [[Picornaviridae#Foot and Mouth Disease Virus|foot and mouth disease]] - dull, salivating (if only one animal is unlikely to foot and mouth). - nearly always sporadic. The tongue feels like a big lump of wood especially the dorsal part of posterior 2/3rds.

*ongue feels like a big lump of wood especially dorsal part of posterior 2/3rds.

This is often found in conjunction with small areas of ulceration on the side of [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]].

*Small areas of ulceration are often found on side of [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]].

====Pathogenesis====

====Pathogenesis====

*Very similar to [[Mandibular Osteomyelitis|Mandibular Osteomyelitis]] ("lumpy jaw").   

*Very similar to [[Mandibular Osteomyelitis|Mandibular Osteomyelitis]] ("lumpy jaw").   

 

====Pathology====

====Pathology====