Active TB can be diagnosed via the following Process:
1-History of contact with a TB Patient.
2-Non specific TB symptoms such as fever , malaise , anorexia and weight loss.
3-If TB is suspected a Mantoux test is perforemed , and induration measured ,
an induration of more than 10mm with no BCG adminstration , or 15mm with BCG vaccination implies active TB.
4-Culture of the bacteria can be done , in children as they swallow the sputum , collection is done by 3 consecutive gastric washings , to isolate the organism , in adults however the organism can be isolated from the coughed sputum.
5-The organism is cultured , a positive culture denotes active TB.
6-The organism is viewed as acid fast bacilli with zeihl nelsen stain , and tested for antibiotic sensitivity.
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Tuberculin skin testing, but Mantoux Purified Protein Derivative skin test is considered a more accurate skin test for diagnosing tuberculosis.
On a chest x ray, evidence of the disease appears as numerous white, irregular areas against a dark background, or as enlarged lymph nodes.
A diagnosis of active, infectious tuberculosis is never made solely based on the results of a TB skin test, but requires further testing, including a sputum culture and a chest x-ray.