1.Safa A, et al. Genetic characteristics of Matlab variants of Vibrio cholerae O1 that are hybrids between classical and El Tor biotypes. Journal of Medical Microbiology 2006; 55: 1563–1569.
2.Ansaruzzaman M, et al. Cholera in Mozambique, variant of Vibrio cholerae. Emerging Infectious Diseases 2004; 10: 2057–2059.
3.Nair GB, et al. Cholera due to altered El Tor strains of Vibrio cholerae O1 in Bangladesh. Journal of Clinical Microbiology 2006; 44: 4211–4213.
4.Safa A, et al. Vibrio cholerae O1 hybrid El Tor strains, Asia and Africa. Emerging Infectious Diseases 2008; 14: 987–988.
5.Nair GB, et al. Cholera due to altered El Tor strains Vibrio cholerae O1 in Bangladesh. Journal of Clinical Microbiology 2006; 38: 4211–4213.
6.Chin CS, et al. The origin of the Haitian cholera outbreak strain. New England Journal of Medicine 2011; 364: 33–42.
7.Taneja N, et al. Outbreaks caused by new variant of V. cholerae O1 El Tor, India. Emerging Infectious Diseases 2009; 15: 352–353.
8.Kumar P, et al. A large cholera outbreak due to a new cholera toxin variant of the Vibrio cholerae O1 El Tor biotype in Orissa, Eastern India. Journal of Medical Microbiology 2009; 58: 234–238.
9.Pal BB, et al. Epidemics of severe cholera caused by El Tor Vibrio cholerae O1 Ogawa possessing the ctxB gene of the classical biotype in Orissa, India. International Journal of Infectious Diseases 2010; 14: 384–389.
10.World Health Organization. Manual for Laboratory Investigations of Acute Enteric infections, CDD/83.3. Geneva: World Heath Organization, 1987.
11.Bauer AW, et al. Antibiotic susceptibility testing by a standardized single disc method. American Journal of Clinical Pathology 1996; 45: 493–496.
12.Khuntia HK, Pal BB, Chhotray GP. Quadruplex PCR assay for simultaneous detection of biotype, serotype, toxigenic potential and central regulating factors of Vibrio cholerae. Journal of Clinical Microbiology 2008; 46: 2399–2401.
13.Morita M, et al. Development and validation of a mismatch amplification mutation PCR assay to monitor the dissemination of an emerging variant of Vibrio cholerae O1 biotype El Tor. Microbiology Immunology 2008; 52: 314–317.
14.Chhotray GP, et al. Incidence and molecular analysis of V. cholerae associated with cholera outbreak subsequently to the super cyclone in Orissa, India. Epidemiology and Infection 2002; 128: 131–138.
15.Sinha S, et al. Molecular comparison of toxigenic clinical and non-toxigenic environmental strains of Vibrio cholerae O1 Ogawa isolated during an outbreak of cholera in South India. Indian Journal of Medical Research 2001; 114: 883–889.
16.Goel AK, et al. Molecular characterization of Vibrio cholerae outbreak strains with altered El Tor biotype from southern India. World Journal of Microbiology and Biotechnology 2010; 26: 281–287.
17.Faruque AS, et al. Emergence of multidrug-resistant strains of Vibrio cholerae O1 in Bangladesh and reversal of their susceptibility to tetracycline after two years. Journal of Health Population and Nutrition 2007; 25: 241–243.
18.Garg P, et al. Emergence of fluoroquinolone-resistant strains of Vibrio cholerae O1 biotype El Tor among hospitalized patients with cholera in Calcutta, India. Antimicrobial Agents and Chemotherapy 2006; 45: 1605–1606.
19.Krishna BV, Patil AB, Chandrasekhar MR. Fluoroquinolone-resistant Vibrio cholerae isolated during a cholera outbreak in India. Transactions of Royal Society of Tropical Medicine and Hygiene 2006; 100: 224–226.
20.Goel AK, Jiang SC. Genetic determinants of virulence, antibiogram and altered biotype among the Vibrio cholerae O1 isolates from different cholera outbreaks in India. Infection Genetics and Evolution 2010; 10: 815–819.
21.Jesudason MV. Change in serotype and appearance of tetracycline resistance in V. cholerae O1 in Vellore, South India. Indian Journal of Medical Microbiology 2006; 24: 152–153.
22.Sabeena F, et al. In vitro susceptibility of Vibrio cholerae O1 biotype El Tor strains associated with an outbreak of cholera in Kerala, Southern India. Journal of Antimicrobial and Chemotherapy 2001; 47: 361–362.
23.Beaber JW, Waldor MK. Identification of operators and promoters that control SXT conjugative transfer. Journal of Bacteriology 2004; 186: 5945–5949.
24.Beaber JW, Hochhut B, Waldor MK. Genomics and functional analysis of SXT, an integrating antibiotic resistance gene transfer elements derived from Vibrio cholerae. Journal of Bacteriology 2002; 184: 4259–4269.
25.Kaper JB, Morris JG Jr., Levine MM. Cholera. Clinical Microbiology Review 1995; 8: 48–86.
26.Waldor MK, Mekalanos JJ. Lysogenic conversion by a filamentous phage encoding cholera toxin. Science 1996; 272: 1910–1914.