. 2015 Jan 20;143(13):2841–2848. doi: 10.1017/S095026881400394X

Table 1.

Demographic, clinical and laboratory characteristics of tuberculosis cases reported in a call centre in Milan (Italy) over a 5-year period, and results of contact investigations performed

No.	Sex, age (years)	Date of symptom onset	Date of report	Laboratory and other investigations	Contacts tested		No. of latent infections
No.	Sex, age (years)	Date of symptom onset	Date of report	Laboratory and other investigations	Type of contact	No.	No. of latent infections
1^*	F, 39	August 2011	December 2011	Clinical exam +	Close (family and other)	2	0
				Chest X-ray +	Close (work)	33	8
				Smear +	Regular (family)	16	2
				Culture +	Regular (work)	16	1
				PCR +	Occasional (work)	107	21
					Occasional (other)	9	0
					Total	183	32
2	F, 26	October 2009	April 2010	Clinical exam +	Close (family)	3	1
				Chest X-ray +	Regular (work)	16	3
				Smear −	Occasional (other)	4	0
				Culture +
				PCR +
				TST −
					Total	23	4
3^†	F, 40	July 2007	August 2007	Clinical exam +	Close (family)	4	3
				Chest X-ray +
				Smear +
				Culture +
					Total	4	3
4	M, 32	April 2006	May 2006	Clinical exam +	Contact investigation not performed (non-contagious, case)	0	0
				Chest X-ray −
				Smear −
				Culture −
				TST +
					Total	0	0
Total						210	39 (18·6%)

Polymerase chain reaction (PCR) test used: Gene Xpert.

Index case.

^†

Source case.

+, Positive; –, negative.