Table 3.

Distribution of penicillin resistance among different clusters

Cluster	No. of isolates	Penicillin-resistant strains
		No.	%
8	91	33	36.3
20	89	2	2.2
97	48	34	70.8
151	85	1	1.2
Others	30	19	60.0
Total	343	88	25.7