. Author manuscript; available in PMC: 2010 Feb 1.

Published in final edited form as: J Infect Dis. 2009 Feb 1;199(3):320–325. doi: 10.1086/596064

Table 1.

Nasopharyngeal carriage among children.

		No. of pneumococcal isolates
				Expressing serotypes^a
Group	Study period	Obtained	Serotyped	6A	6C	6B
1	March 1994–April 1996	224	224	20	0	NA
2	October 1999–May 2000	119	119	13	2	8
3	October 2000–September 2003	145	145	43	2	32
4	March 2001–May 2001	190	153	22^b	3^b	14
5	November 2003–April 2004	232	226	18^b	5^b	5
6	October 2006–May 2007	294	294	6^b	26^b	2
7	October 2006–May 2007	122	122	6	10	0

NOTE. Only the result from the first culture obtained per child was included in the table. NA, not available.

Serotypes 6A and 6C were determined using monoclonal antibodies. Serotype 6B was determined by the quellung method.

For groups 4, 5, and 6, respectively, 27, 24, and 34 isolates were originally typed as 6A by the quellung method; only 25, 23, and 32, respectively, were available for monoclonal antibody analysis of 6A vs. 6C. The 5 unavailable isolates were not included as 6A or 6B in our calculation.