TABLE 1.

Clinical data for PCP patients hospitalized in ward rooms where the air was filtrated for identification of P. carinii hominis genotypes

Patient	Hospital location	Date of filtration experiment	Sexa/age (yr)	Previous PCP episodes	CD4+-cell count/μl	Level of P. carinii organisms in clinical samples
1	Huddinge	July 1995	M/38	1994	260	Intermediate
2	Huddinge	August 1995	M/31		110	Many
3	Danderyd	April 1996	M/45		174	Few
4	Huddinge	April 1996	F/49	1991 and 1996	40	Few
5	Huddinge	June 1996	F/41		90	Intermediate
6	Huddinge	September 1996	M/39		50	Intermediate
7	Paris	December 1996	M/43		66	Intermediate

^aM, male; F, female.