Cheesy Gland (CLA)
Caseous Lymphadenitis (CLA), or Cheesy Gland is a common, chronic disease of sheep and goats. It is characterised by formation of abcesses caused by the bacterium Corynebacterium pseudotuberculosis.
Cheesy gland is a significant disease in sheep and goats, which causes considerable production losses and financial cost to producers and the industry due to its detrimental effects on fleece production and carcass quality. The disease affects the lymph nodes and internal organs and infection usually occurs during shearing, crutching and lamb marking through contamination of open wounds from instruments and close contact when yarded. The bacteria which cause CLA are able to survive for long periods in the environment in dust, faeces and lesions of infected sheep and will even survive in dip wash for up to 24 hours.
Cheesy gland is widespread throughout sheep and goat flocks around the world and due to the hidden nature of the disease, it is usually diagnosed only after slaughter. Cheesy gland may be suspected when individual older sheep and goats lose condition for no apparent reason. Shearers will occasionally nick an abscess when shearing to reveal the green pus within.
There is no known cure for CLA.Therefore an effective vaccination program, together with good animal health management practices is the most effective& prevention for this disease.