Table 3.

Serum IgG anti-LPS of Salmonella Paratyphi A in convalescents (6 weeks after infection), a chronic carrier, and in healthy students and adults

Patient	Age (yr)	IgG anti-LPS (ELISA units)	Healthy controls	Age (yr)	IgG Anti-LPS (ELISA units)
P1	12	75.07	C1	15	2.00
P2	13	22.01	C2	15	1.11
P3	13	22.46	C3	15	5.20
P4	13	25.19	C4	15	1.43
P5	13	25.59	C5	14	18.65
P6	45	41.70	C6	15	8.80
P7	15	46.19	C7	13	10.94
P8	15	26.46	C8	14	7.05
P9	12	19.54	C9	48	7.93
P10	14	48.02	C10	56	7.49
P11	13	73.99	C11	13	3.03
P12 (KW2)	53	43.53	C12	13	10.32
GM		35.25	GM		5.20
KW1	40	529.65

KW, Kitchen worker; GM, geometric mean.

IgG anti-LPS: patients vs. controls (35.25 vs. 5.20, P<0.001).