Table 5. Percentage of V. cholerae O139 susceptible to tetracycline, erythromycin, ciprofloxacin and azithromycin during the period, 1993 to 2020.

Year	Number of isolates tested	Tetracycline	Erythromycin	Ciprofloxacin	Azithromycin
1993–1998	1580	93.7%	94.3%
1999–2004	299	98.7%	99.0%
2005–2008	V. cholerae O139 was not isolated during this period
2009–2014*	109*	78.0%	2.8%	93.6%	85.9%
2015–2020	71	64.8%	1.4%	90.1%	78.9%

*Azithromycin was not tested in 2009; n = 85 for azithromycin during 2010–2014