Table 2. Antimicrobial susceptibility pattern of Vibrio cholerae isolates, Papua New Guinea, 2009 to 2011.

Year	Amoxycillin			Chloramphenicol			Ciprofloxacin			Erythromycin
	# tested	% resistant	% intermediate resistant	# tested	% resistant	% intermediate resistant	# tested	% resistant	% intermediate resistant	# tested	% resistant	% intermediate resistant
2009	37	73.0	13.5	0	–	–	37	0.0	0.0	0	–	–
2010	215	70.7	21.9	204	3.9	2.0	217	1.4	0.9	203	34.5	57.6
2011	50	100	0.0	51	0.0	0.0	51	0.0	0.0	51	52.9	43.1
Total	302	75.8	17.2	255	3.1	1.6	305	1.0	0.7	254	38.2	54.7

Year	Nalidixic acid			Norfloxacin			Co-trimoxazole			Tetracycline
	# tested	% resistant	% intermediate resistant	# tested	% resistant	% intermediate resistant	# tested	% resistant	% intermediate resistant	# tested	% resistant	% intermediate resistant
2009	34	0.0	0.0	37	0	2.7	26	3.8	0.0	36	2.8	25.0
2010	215	0.5	0.9	208	0	0.5	205	3.9	2.0	212	13.2	37.3
2011	51	0.0	0.0	51	0	0.0	51	0.0	0.0	51	0.0	11.8
Total	300	0.3	0.7	296	0	0.7	282	3.2	1.4	299	9.7	31.4