TABLE 1.

Presumed cases of laboratory cross-contamination detailing symptoms, therapy, and final diagnosis

Case	Reason investigateda	Antituberculous drugs given	Assessment conclusion
A	CXR—prominent hilum	None	Left atrial myxoma
B	Persistent cough	None	Lung carcinoma
C	Cough, fever	None	Presumed pneumonia
D	CXR—parenchymal shadowing, cough	None	Pneumocystis carinii pneumonia
F	Persistent cough, breathlessness	None	Laryngeal tumor
G	HIV positive with skin lesions	None	Kaposi's sarcoma
H	Elevated inflammatory markers	Chemoprophylaxis	Polymyalgia
I	Port of entry screening; symptomatic; CXR—abnormal	Full treatment course	Clinically considered case of pulmonary tuberculosis; no possible epidemiological link to cluster
J	Port of entry screening; asymptomatic	None	Not clinically or epidemiologically consistent
K	Port of entry screening; asymptomatic	Chemoprophylaxis	Not clinically or epidemiologically consistent
L	Sterile pyuria	None	Bacterial urinary tract infection

^aCXR, chest X ray; HIV, human immunodeficiency virus.