Table 1. The distribution of −237 C/T polymorphism among patients, healthy contacts and volunteers.

Subjectsa	−237 C/Tb
	Cc		Td
	Ne	%f	N	%
Patients g	46	93.4	3	6.5
Contacts h	35	100	0	0
Volunteers i	28	100	0	0

^a Subjects included in the study;

^b Polymorphism position ;

^c Individuals with C nucleotide at −237 position;

^d Individuals with T nucleotide at −237 position ;

^e Total number of individuals investigated;

^f Percentage of individuals.

^g pulmonary tuberculosis patients ;

^h healthy patients contacts ;

ⁱ Healthy laboratory Volunteers.