Table 2 Relatedness of clinical and water MLVA genotypes of Vibrio cholerae by outbreak
|  | All Outbreaks | Cholera Outbreaks | p-value†| ||
|---|---|---|---|---|---|
Outbreak 1 | Outbreak 2 | Outbreak 3 | |||
June to August 2013 | September 2013 to January 2014 | March to June 2014 | |||
Samples with at least two isolates with different MLVA genotypes | |||||
 Clinical Samples | 76% (42/55) | 47% (8/17) | 79% (15/19) | 100% (19/19) | <0.0001 |
 Water Samples | 100% (46/46) | 100% (8/8) | 100% (15/15) | 100% (23/23) | ‡ |
Isolates with unamplified VCA0171 Allele | |||||
 Clinical Isolates | 0% (0/288) | 0% (0/139) | 0% (0/109) | 0% (0/40) | ‡ |
 Water Isolates | 30% (99/333) | 66% (52/79) | 39% (46/118) | 1% (1/136) | <0.0001 |
Household Characteristics | |||||
 Household member and water isolates with identical MLVA genotypes | 58% (18/31) | 50% (3/6) | 55% (6/11) | 64% (9/14) | 0.09 |
 Index cholera patient and source water isolate with identical MLVA genotypes | 56% (15/27) | 40%(2/5) | 56% (5/9) | 62% (8/13) | 0.09 |
 Household member and source water isolates with identical MLVA genotypes | 52% (16/31) | 50% (3/6) | 46% (5/11) | 57% (8/14) | 0.09 |
 Household member and stored water isolates with identical MLVA genotypes | 40% (2/5) | 0% (0/1) | 50% (1/2) | 50% (1/2) | 0.4 |
 Household member isolates with identical MLVA genotypes | 82% (9/11) | 66% (2/3) | 75% (3/4) | 100% (4/4) | 0.2 |