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Ali, M. and Khan, A.A. and Tiwari, S. and Ahmed, N. and Rao, L.V. and Habibullah, C.M. (2005) Association between cag-pathogenicity island inHelicobacter pyloriisolates from peptic ulcer, gastric carcinoma, and non-ulcer dyspepsia subjects with histological changes. World Journal of Gastroenterology, 11 (43). pp. 6815-6822. ISSN 1007-9327

Tiwari, S. and Khan, A.A. and Ahmed, K.S. and Ali, S.M. and Ahmed, I. and Habeeb, A. and Kauser, F. and Hussain, M.A. and Ahmed, N. and Habibullah, C.M. (2005) Polymerase chain reaction based analysis of the cytotoxin associated gene pathogenicity island of Helicobacter pylori from saliva: An approach for rapid molecular genotyping in relation to disease status. Journal of Gastroenterology and Hepatology, 20 (10). pp. 1560-1566. ISSN 0815-9319

Hussain, M.A. and Kauser, F. and Khan, A.A. and Tiwari, S. and Habibullah, C.M. and Ahmed, N. (2004) Implications of Molecular Genotyping of Helicobacter pylori Isolates from Different Human Populations by Genomic Fingerprinting of Enterobacterial Repetitive Intergenic Consensus Regions for Strain Identification and Geographic Evolution. Journal of Clinical Microbiology, 42 (6). pp. 2372-2378. ISSN 0095-1137

Kauser, F. and Khan, A.A. and Hussain, M.A. and Carroll, I.M. and Ahmad, N. and Tiwari, S. and Shouche, Y. and Das, B. and Alam, M. and Ali, S.M. and Habibullah, C.M. and Sierra, R. and Megraud, F. and Sechi, L.A. and Ahmed, N. (2004) The cag Pathogenicity Island of Helicobacter pylori Is Disrupted in the Majority of Patient Isolates from Different Human Populations. Journal of Clinical Microbiology, 42 (11). pp. 5302-5308. ISSN 0095-1137

Ahmed, N. and Khan, A.A. and Alvi, A. and Tiwari, S. and Jyothirmayee, C.S. and Kauser, S. and Ali, M. and Habibullah, C.M. (2003) Genomic analysis of Helicobacter pylori from Andhra Pradesh, South India: Molecular evidence for three major genetic clusters. Current Science, 85 (11). pp. 1579-1586. ISSN 0011-3891