Changes

*Very similar to [[Teeth - Pathology#Mandibular Osteomyelitis|Mandibular Osteomyelitis]] ("lumpy jaw").   

*Very similar to [[Teeth - Pathology#Mandibular Osteomyelitis|Mandibular Osteomyelitis]] ("lumpy jaw").   

*'''Causal agent''': [[Actinobacillus lignieresi]] (small gram -ve) gets into [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] via small abrasions.   

*'''Causal agent''': [[Actinobacillus lignieresii]] (small gram -ve) gets into [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] via small abrasions.   

**Pathogen is very widespread in environment.

**Pathogen is very widespread in environment.

*Progressive disease - low virulence but high persistence so animal may stop eating and eventually die but can be treated.

*Progressive disease - low virulence but high persistence so animal may stop eating and eventually die but can be treated.

=====Other sites=====

=====Other sites=====

*Occasionally can see generalised infections but more commonly spreads to local lymph nodes of [[Alimentary - Anatomy & Physiology|alimentary tract]].

*Occasionally can see generalised infections but more commonly spreads to local lymph nodes of [[Alimentary - Anatomy & Physiology|alimentary tract]].

*Organism can be inhaled causing [[actinobacillus pneumonia]].

*Organism can be inhaled causing [[Actinobacillus lignieresii|actinobacillus pneumonia]].

*Can affect [[The Rumen - Anatomy & Physiology|rumen]] wall.

*Can affect [[The Rumen - Anatomy & Physiology|rumen]] wall.

*In skin forms a neoplastic like mass in dermis.

*In skin forms a neoplastic like mass in dermis.