TABLE 1.

Susceptibility testing results of N. meningitidisisolates^a

Bacterial isolate/site of isolation	Symptom(s)	Age/sex	Penicillin		Ceftriaxone		Cefotaxime		Nalidixic acid		Ciprofloxacin		Chloramphenicol		Antibiotic therapy	No. of daysb
			MIC	ZD	MIC	ZD	MIC	ZD	MIC	ZD	MIC	ZD	MIC	ZD
CNBC1/blood	Fever for 4 days with rash, altered sensorium	5 yr/M	1.5	35	1.5	47	1.5	48	128	6	0.125	40	0.50	37	Ceftriaxone given at admission (day 0), chloramphenicol added on day 4	7
CNBC2/blood	Not known	5 mo/F	2.0	6	8	19	>32	20	64	6	1.5	33	0.75	33	Patient refused to be admitted, no antibiotic history available	History not available
CNBC3/blood	Fever for 5 days with rash	12 yr/M	0.125	36	1.5	47	4	47	64	6	1.0	38	1.5	29	Ceftriaxone given at admission (for 10 days)	3
CNBC4/blood	Fever with diarrhea and dehydration	4.5 yr/M	>32	6	0.25	46	0.50	48	64	6	1.5	34	8	12	Ceftriaxone given at admission (for 6 days)	6
CNBC5/CSF	Neck stiffness for 4 days with fever and vomiting	6 yr/M	>32	6	6	19	>32	15	0.047	18	0.094	30	>256	6	Ceftriaxone given at admission (day 0), chloramphenicol added on day 5	15
CNBC6/blood	Fever for 2 days with rash, vomiting for 1 day	4.5 yr/F	0.094	ND	1.5	ND	16	ND	>256	ND	1.5	ND	12	ND	Crystalline penicillin given at admission (day 0), ceftriaxone added on day 4	14
CNBC7/blood	Not known	7 mo/M	6.0	ND	3	ND	8	ND	>256	ND	6	ND	128	ND	Patient refused to be admitted, no antibiotic history available	History not available
CNBC8/blood	Fever for 2 days with rash for 1 day	10 mo/M	0.25	ND	1.0	ND	4	ND	>256	ND	2	ND	12	ND	Ceftriaxone given at admission	5

^aCSF, cerebrospinal fluid; ZD, zone diameter; ND, not determined; M, male; F, female. MIC values are given in micrograms per milliliter. Zone diameters are given in millimeters. Resistant/nonsusceptible readings are in boldface.

^bNumber of days after starting antibiotic treatment to become afebrile.