Mode of Transmission: ingestion infection:
1) Ingestion of raw or insufficiently heated milk or dairy products (cheese and yogurt) mde of this milk.
How bovine tuberculosis bacilli reach milk?
-Directly secreted in milk,from infected udder.
-Contamination of milk with discharges of tuberculous animals,whithin the animal environment.
2) Ingestion of insufficiently cooked or processed meat.
3) Ingestion of raw or insufficiently boiled eggs.
Why milk is the main vehicle of tuberculous infection than meat?
-milk is a popular,regularly consumed food.
-milk is ready food and so may be consumed without heating,while meat is usually cooked.
-milk used in many widely consumed dairy products is not necessrily boiled or pasteurized beforehand,and may be just warmed and so is not safe.
-milk may be infected or contaminated with many pathogens from two sources,animal and man.
-milk takes a long way from farm to consumer whit many handling and exposure to contamination and hot weather.
-nutrients of milk llow rapid growth of organisms,specially in hot weather without cooling.
-water used in adulteration of milk or washing utensils may be polluted.
-fulfilment of milk sanitation is practically difficult in developing countries.
Symptoms of Extrapulmonary Tuberculosis:
Extrapulmonary Tuberculosis involves he lymph nodes,bones and joints,intestine,kidney,meninges and other parts of the body.All systems of the body including the skin are at-risk in varied incidence.Clinical picture depends of parts affected.
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