Browsing by Author "Qadri, Firdausi"
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Item A 4-year study of the epidemiology of Vibrio cholerae in four rural areas of Bangladesh(2003) Sack, R. Bradley; Siddique, A. Kasem; Longini, Ira M. Jr.; Nizam, Azhar; Yunus, Md. Yunus; Islam, M. Sirajul; Morris, J. Glenn Jr.; Ali, Afsar; Huq, Anwar; Nair, G. Balakrish; Qadri, Firdausi; Faruque, Shah M.; Sack, David A.; Colwell, Rita R.Item A comparative study on virulence-associated properties of campylobacter jejuni strains obtained from patients and healthy carriers(1990) Hossain, Ashfaque; Qadri, Firdausi; Faruque, S.M.; Albert, M. JohnItem Adaptive and inflammatory immune responses in patients infected with strains of Vibrio parahaemolyticus.(2003) Qadri, Firdausi; Alam, Muhammad Shamsul; Nishibuchi, Mitsuaki; Rahman, Taufiqur; Alam, Nur Haque; Chisti, Jobayer; Kondo, Seiichi; Sugiyama, Junichi; Bhuiyan, Nurul Amin; Mathan, Minnine M.; Sack, David A.; Nair, G. BalakrishItem An evaluation of immune response in aeromonas-associoated diarrhoea, and characterization of strains for some important virulence markers(1993-09-29) Alabi, Sunday Abraham; Abert, M. John; Qadri, Firdausi; Faruque, A.S.G.; Rahman, A.S.M. Hamidur; Sack, R.B.Item Antibody responses in humans against coli surface antigen 6 of enterotoxigenic Escherichia coli(1998-09) Helander, Anna; Wennerås, Christine; Qadri, Firdausi; Svennerholm, Ann-MariItem Antigen-specific immunoglobulin A antibodies secreted from circulating B cells are an effective marker for recent local immune responses in patients with cholera: comparison to antibody-secreting cell responses and other immunological markers(2003) Qadri, Firdausi; Ryan, Edward T.; Faruque, A.S.G.; Ahmed, Firoz; Khan, Ashraful Islam; Islam, M. Munirul; Akramuzzaman, Syed M.; Sack, David A.; Calderwood, Stephen B.Item Antigen-specific memory B-cell responses in Bangladeshi adults after one or two dose oral killed cholera vaccination, and comparison with responses following natural cholera(2011) Alam, Mohammad Murshid; Riyadh, M. Asrafuzzaman; Fatema, Kaniz; Rahman, Mohammad Arif; Akhtar, Nayeema; Ahmed, Tanvir; Chowdhury, Mohiul Islam; Chowdhury, Fahima; Calderwood, Stephen B.; Harris, Jason B.; Ryan, Edward T.; Qadri, FirdausiNational Institutes of HealthItem Association between Size at Birth and Maternal Factors in Rural Bangladesh: A Multivariate Approach(University of Rajshahi, 2016) Kabir, A.Y.M. Alamgir; Qadri, FirdausiIn this research we explored the potential of the multivariate methods, CCA and PLS regression in studying the relationship between two sets of variables in public health research. This research will help the public health researchers in choosing the appropriate statistical methods if they want to study multiple outcomes and multiple exposures simultaneously. Additionally, we intended to identify a surrogative measure of low birth weight (LBW) using ROC curve and 4 machine learning algorithms, decision tree, random forest, support vector machine and neural network. Both the canonical correlation analysis and the PLS regression analysis has several advantages over the univariate methods. However, CCA is just an exploratory method very similar to Pearson’s correlation. Although one variable set is often considered as predictor and the other as criterion, it does not imply causal relationship between the set of exposures and the set of outcomes. On the other hand, PLS regression can help in establishing causal relationship between exposures and the outcomes. So, the choice of CCA or PLS regression depends on the objective of the study. In addition, this study will provide a realistic predictive model of LBW for Rural Bangladesh. The LBW can be predicted with 4 other simpler-to-measure anthropometries, length and head, chest and arm circumferences without measuring their weights, at a greater accuracy with the advent of the information technology.Item Bacterial and viral pathogen spectra of acute respiratory infections in under-5 children in hospital settings in Dhaka city(2017) Bhuyan, Golam Sarower; Hossain, Mohammad Amir; Sarker, Suprovath Kumar; Rahat, Asifuzzaman; Islam, Md Tarikul; Haque, Tanjina Noor; Begum, Noorjahan; Qadri, Syeda Kashfi; Muraduzzaman, A.K.M; Islam, Nafisa Nawal; Islam, Mohammad Sazzadul; Sultana, Nusrat; Jony, Manjur Hossain Khan; Khanam, Farhana; Mowla, Golam; Matin, Abdul; Begum, Firoza; Shirin, Tahmina; Ahmed, Dilruba; Saha, Narayan; Qadri, Firdausi; Mannoor, KaiissarItem Bacterial clump formation at the surface of liquid culture as a rapid test for identification of enteroaggregative Escherichia coli(1993-05) Albert, M.John; Qadri, Firdausi; Haque, Azizul; Bhuiyan, Nurul A.Item Binding of shigella species to hydrophobic gels(1992) Schultsz, Constance; Qadri, Firdausi; Ciznar, Ivan; Bartkova, Gabriela; Hossain, Shaik Abu; Wadstrom, TorkelItem Comparison of immune responses in patients infected with Vibrio cholerae O139 and O1(1997-09) Qadri, Firdausi; Wennerås, Christine; Albert, M. John; Hossain, Jaber; Mannoor, Kahssar; Begum, Yasmin Ara; Mohi, Golam; Salam, Mohammad Abdus; Sack, R. Bradley; Svennerholm, Ann-MariItem Comparison of Lipopolysaccharide (LPS) specific IgA and IgG avidity maturation between Vivotif Vaccinees and naturally infected enteric patients in Bangladesh(BRAC University, 2014-08) Rashed, Faisal Bin; Choudhury, Naiyyum; Qadri, FirdausiEnteric fever, primarily caused by Salmonella enterica serovar Typhi and Paratyphi, is a potentially life-threatening systemic disease. Characterized by fever, malaise and diffused abdominal pain, it can lead to delirium, intestinal hemorrhage, bowel perforation, and even death if left untreated. High prevalence rates of enteric fever have been reported in the resource limited regions of the world, with children under 5 years of age being the largest target. Poor sensitivity and specificity of conventional diagnostic approaches result in lower or late detection of the infection. The TPTest, a novel diagnostic technique, has proved to be highly sensitive and specific for detection of the patients with enteric fever. Vaccination also is potentially important to reduce the incidence of enteric fever among young children. Vivotif, a live oral attenuated typhoid vaccine, has undergone clinical trials in different countries, including Bangladesh. However, no data on the analysis of the immune response or longevity has been carried out. The antibody avidity maturation in typhoid vaccinees or patients has also not been reported till date. Under these circumstances, this study demonstrates the lipopolysaccharide (LPS) specific immunoglobulin A (IgA) and immunoglobulin G (IgG) avidity maturation in Vivotif vaccinees and naturally infected typhoid patients aged below 5 years. Also, the age dependent variation in avidity maturation was analyzed, both in S. Typhi bacteremic and only TPTest positive patients. Vaccination with Vivotif generated IgA and IgG antibodies with significantly higher avidity that lasted throughout the study period of 28 days. Patients with S. Typhi bacteremia with an age below 5 years showed a higher IgA avidity index in the first two study day points, followed by a decrease on the second follow-up. Overall, culture positive patients had a higher IgA avidity index compared to the only TPTest positive patients, regardless of age. A similar response for IgG avidity maturation was seen among patients. Lack of significant differences in IgG avidity between different day points within a group could be attributed to the longer half-life of IgG. In short, S. Typhi bacteremic patients produced more highly avid IgA and IgG antibodies against LPS compared to only TPTest positive patients, indicating that higher bacterial load in the system may aid in generation of higher avidity antibodies.Item Comparison of the vibriocidal antibody response in cholera due to Vibrio cholerae O139 Bengal with the response in cholera due to Vibrio cholerae O1(1995-11) Qadri, Firdausi; Mohi, Golam; Hossain, Jaber; Azim, Tasnim; Khan, A.M.; Salam, M.A.; Sack, R.B.; Albert, M. John; Svennerholm, A.M.Item Comparison of Vibrio cholerae serotype 01 strains isolated from patients and the aquatic environment(1993-04) Huq, Anwarul; Parveen, Salina; Qadri, Firdausi; Sack, David A.; Colwell, Rita R.Item Congo red binding and salt aggregation as indicators of virulence in Shigella species(1988-07) Qadri, Firdausi; Hossain, Shaikh Abu; Ciznár, Ivan; Haider, Khaleda; Ljungh, Asa; Wadstrom, Torkel; Sack, David A.Item Cytokines in the stools of children with complicated shigellosis(1995-07) Azim, Tasnim; Halder, R. Chandra; Sarker, M. Safiullah; Ahmed, Sharmeen; Hamadani, Jena; Chowdhury, Akhtaruzzaman; Qadri, Firdausi; Salam, M. Abdus; Sack, R. Bradley; Albert, M. JohnItem Detection of antibodies to toxin-coregulated pili in sera from cholera patients(2004-03) Attridge, Stephen R.; Wallerström, Gun; Qadri, Firdausi; Svennerholm, Ann-MariItem Development and evaluation of rapid monoclonal antibody-based coagglutination test for direct detection of Vibrio cholerae O139 synonym Bengal in stool samples(1994-06) Qadri, Firdausi; Chowdhury, Ashrafuzzaman; Hossain, Jaber; Chowdhury, Khaleda; Azim, Tasnim; Shimada, Toshio; Islam, K. M.; Sack, R. Bradley; Albert, M. JohnItem Development of an immunodiagnostic assay for the detection of shigella and identification of species/serotype specificity directly from human samples(1990-03-08) Islam, Dilara; Azim, Tasnim; Qadri, Firdausi; Islam, Sayedul