REFERENCES
- Agarwal, K. C., Panhotra, B. R., Mahanta, J., Arya, V. K. & Garg, R. K. (1981). Typhoid fever due to chloramphenicol resistant Salmonella typhi associated with R-plasmid. Indian Journal of Medical Research, 73, 484–488.
- Akhtar, M. A., Karamat, K. A., Malik, A. Z., Hasmi, A., Khan, Q. M. & Rasheed, P. (1989). Efficacy of Ofloxacin in typhoid fever, particularly in drug resistant cases. Reviews in Infectious Diseases, 2 (Suppl. 5), s1193.
- Anand, A. C., Kataria, V. K., Singh, W. & Chatterjee, S. K. (1990). Epidemic multi-resistant enteric fever in eastern India. Lancet, i, 352.
- Asperilla, M. O., Smego, R. A. Jr. & Scott, L. K. (1990). Quinolone antibiotics in the treatment of Salmonella infections. Reviews in Infectious Diseases, 12, 873–889.
- Birnboim, H. C. & Doly, J. (1979). A rapid alkaline extraction procedure for screening recombinant plasmid DNA. Nucleic Acid Research, 7, 1513–1523.
- Goldstein, F. W., Chumpitaz, J. C., Guevara, J. M., Papadopoulou, B., Acar, J. F. & Vieu, J. F. (1986). Plasmid mediated resistance to multiple antibiotics in Salmonella typhi. Journal of Infectious Diseases, 153, 261–265.
- Hunter, J. E. B., Shelley, J. C., Walton, J. R., Hart, C. A. & Bennett, M. (1992). Apramycin resistance plasmids in Escherichia coli: possible transfer to Salmonella typhimurium in calves. Epidemiology and Infection, 108, 271–278.
- Jesuadson, M. V. & John, J. T. (1990). Multi-resistant Salmonella typhi in India. Lancet, ii, 252.
- Jesuadson, M. V. & John, J. T. (1992). Plasmid mediated multi-drug resistance in Salmonella typhi. Indian Journal of Medical Research, 95 (A), 66–67.
- Karmaker, S., Biswas, D., Shaikh, N. M., Chatterjee, S. K., Kataria, V. K. & Kumar, R. (1991). Role of a large plasmid of Salmonella typhi encoding multiple drug resistance. Journal of Medical Microbiology, 34, 149–151.
- Ling, J. & Chan, P. Y. (1984). Plasmid mediating resistance to chloramphenicol, trimethoprim and ampicillin in Salmonella typhi strains isolated in the South East Asian region. Journal of Infectious Diseases, 149, 652.
- Olarte, J. & Galindo, E. (1973). Salmonella typhi resistant to chloramphenicol, ampicillin and other antimicrobial agents: strains isolated during an extensive typhoid fever epidemic in Mexico. Antimicrobial Agents and Chemotherapy, 4, 597–601.
- Paniker, C. K. & Vimala, K. N. (1972). Transferable chloramphenicol resistance in Salmonella typhi. Nature, 239, 109–110.
- Phipps, M., Pang, T., Lek Koh, C. & Puthucheary, S. (1991). Plasmid incidence rate and conjugative chloramphenicol and tetracycline resistance plasmids in Malaysian isolates of Salmonella typhi. Microbiology and Immunology, 35, 157–161.
- Rowe, B., Threlfall, E. J. & Ward, L. R. (1987). Does chloramphenicol remain the drug of choice for typhoid? Epidemiology and Infection, 98, 379–383.
- Rowe, B., Ward, L. R. & Threlfall, E. J. (1992). Ciprofloxacin and typhoid fever. Lancet, i, 740.
- Sambrook, J., Fritsch, E. & Maniatis, T. (1989). Molecular cloning. In A Laboratory Manual, pp. 6.1–6.9. New York: Cold Spring Harbor Laboratory.
- Schwalbe, R. S., Hoge, C. W., Morris, J. G. Jr., O'Hanlon, P. N., Crawford, R. A. & Gilligan, P. H. (1990). In-vivo selection for transmissible drug resistance in Salmonella typhi during antimicrobial therapy. Antimicrobial Agents and Chemotherapy, 34, 161–163.
- Shears, P., Suliman, G. & Hart, C. A. (1988). Occurrence of multiple resistance and R plasmids in Enterobacteriaceae isolated from children in Sudan. Epidemiology and Infection, 100, 73–81.
- Sridhar, H., Macaden, R., Lakshmi, Devi, M. C. & Bhat, P. (1983). Chloramphenicol resistant Salmonella typhi in Bangalore. Indian Journal of Medical Research, 78, 314–318.
- Stokes, E. J. & Waterworth, P. M. (1973). Antibiotic sensitivity tests by diffusion methods. Association of Clinical Pathology Broadsheets, 55, 1–12.
- Sugandhi Rao, P., Rajashekar, V., Varghese, G. K. & Shivananda, P. G. (1993). Emergence of multi-drug resistant Salmonella typhi in rural southern India. American Journal of Tropical Medicine and Hygiene, 48, 108–111.
- Umasankar, S., Wall, R. A. & Berker, J. (1992). A case of ciprofloxacin resistant typhoid fever. Communicable Disease Report, 2, R139–R140.
- Xiao, Q. L. (1987). A comparison study on the application of plasmid profile analysis, phage typing and antimicrobial susceptibility testing to the epidemiological investigation of typhoid. Chung-Hua-liu- Hsing-Ping-Hsuch-Tas-China, 8, 272–275.
- Zhang, L. (1991). Mechanism of multi-resistant Salmonella typhi. Chung-Hua-I-Hsuch-Tas-China, 71, 314–317.