Table 1.

Clinical and laboratory findings in 18 (12.5%) of 144 adults hospitalized with CAP who were positive for M. pneumoniae in any of the laboratory tests used for diagnosis

Patient no.	Interval between first symptoms and sampling (days)	Antibiotic^a used before enrollment	Age (yr)	Underlying pulmonary disease	Titer obtained with:				Result of PCR on indicated sample				Concomitant pathogen(s)
					MAG test in sample:		CFT in sample:		Nasopharynx	Throat swab	Throat wash	Sputum
					1	2	1	2	Nasopharynx	Throat swab	Throat wash	Sputum
1	10	AMZ	33		≥160	≥160	≥128	≥128	+	+	+	+	C. pneumoniae
2	12	AMZ	36		<40	≥160	<4	≥128	+	+	+	+	C. pneumoniae
3	5	AMZ	51		<40	<40	<4	32	+	+	+	+
4	7	Ceph	44		≥160	≥160	≥128	≥128	+	−	+	+
5	2	PEN	45		≥160	≥160	4	64	+	−	+	+
6	4		48		<40	<40	<4	32	−	+	−	+
7	6		73	COPD	<40	<40	4	32	−	−	−	+	Parainfluenza virus, H. influenzae
8	14		36		<40	<40	≥128	64	−	−	−	−
9	14		38		<40	<40	<4	16	−	−	−	−
10	1	ERY	66	COPD	NT^b	NT	8	32	NA^c	−	−	NA	C. pneumoniae
11	32		84	COPD	<40	<40	64	64	−	−	−	+	S. pneumoniae, L. pneumophila
12	13		64	COPD	<40	<40	8	8	−	−	−	+	H. influenzae
13	NA		65	COPD	<40	<40	8	8	−	−	−	+
14	3	CIP	68	COPD	<40	<40	32	32	−	−	+	NA
15	3	DOX	70		<40	<40	<4	<4	−	−	+	−	Adenovirus
16	4	AMC	76		<40	<40	8	16	+	−	NA	−	Respiratory syncytial virus
17	3		83	COPD	<40	<40	32	32	+	−	NA	−	S. pneumoniae
18	12		71		<40	<40	4	4	−	+	−	−

↵a AMZ, amoxicillin; Ceph, cephalosporin; PEN, penicillin; ERY, erythromycin; CIP, ciprofloxacin; DOX, doxycycline; AMC, amoxicillin-clavulanate.
↵b NT, not tested.
↵c NA, not available.