Table 1. Distribution of serum-sensitive and serum-resistant serotypes of K. pneumoniae selected for this study.

Serotypes	No. of isolates		p value
	Sensitivity (Grade 1–4)	Resistance (Grade 5–6)
K1 (n = 20)	4	16
Non-K1/K2 (n = 17)*	12	5
K1 vs. non-K1/K2			0.0019

*The 17 strains of non-K1/K2 contained one isolate each of K3, K6, K15, K16, K17, K20, K21, K22, K29, K31, K36, K38, and K54 and two isolates each of K55 and K28. The grading system used to assess serum resistance was described by Podschun et al. (1991).