Biomedical subjects
D D Banker
Publications and source records attributed to D D Banker.
Monoclonal antibodies. A review.
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Smallpox vaccination--update. 1981.
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Human immunodeficiency viruses types 1 and 2 infection among replacement blood donors in Mumbai (Bombay).
Between 1993-96, blood donated by 12,235 replacement blood donors was screened by various Enzyme Linked Immunosorbent Assays for detecting antibodies to Human Immunodeficiency Viruses types 1 and 2 according to the guidelines specified by Indian--Food and Drug Administration. 222 replacement blood donors (1.81%) were found to be seropositive for antibodies to Human Immunodeficiency Virus types 1 and 2. Furthermore, the ImmunoComb II HIV 1 & 2 BiSpot rapid sandwich ELISA in a comb format was used for differentially identifying HIV-1 and/or HIV-2 infection among these blood donors in Mumbai. Our data indicates that there is a low seroprevalence of HIV-1-2 infection among replacement blood donors in Mumbai (Bombay). Among them, while HIV-1 is still the predominant virus, dual HIV-1-2 and HIV-2 only infections are steadily increasing.
Importance of autopsy in prevention of epidemics.
With resurgence of infectious diseases all over the globe, there is need for constant surveillance and specially trained staff to expertly carry out autopsies on suspected cases and determine the exact cause of death. Early and accurate diagnosis is important in order to prevent worldwide spread of the disease.
Allergy diagnosis by Pharmacia Cap System.
From September 1995 to September 1998, sera from 959 suspected allergy patients have been tested by the new Pharmacia Cap System. Of these, 80 per cent were diagnosed to suffer from some allergy while 20 per cent reacted negative. It was found that the CAP system gave accurate and clear cut results to the satisfaction of the patient and referring physician.
Multidrug resistant Salmonella.
A total of 326 salmonella strains was isolated and studied from suspected enteric fever cases in Mumbai (Bombay) during a 2 year period from May 1992 to July 1994. These were identified using standard biochemical and serological tests. Bacteriophage typing, antibiotic sensitivity and conjugation experiments were also carried out. S. typhi was the most common serotype accounting for 75.46% of the strains. Among S. typhi strains 87% were biotype I and 13% were biotype II. 9.5% strains were of S. paratyphi A, 5.52% of S. typhimurium, 4.60% of S. worthington, 4.30% of S. havana and 0.62% of S. enteritidis. The commonest bacteriophage type of S. typhi was E1, and of S. paratyphi A type 1, whereas 88.88% strains of S. typhimurium were untypable. Most of the strains were multidrug resistant including commonly used antibiotics such as chloramphemicol, ampicillin, and cotrimaxazole. Quinolone derivatives such as Ciprofloxacin were found to be the most effective drugs. In the conjugation experiments there was direct transfer of resistance pattern and enbloc transfer of resistance was observed in most strains. Salmonella typhi is still the most commonly encountered species. There is an alarming increase in multidrug resistance.
Emerging and re-emerging infectious diseases.
A number of "new" infections are emerging in our midst and the medical practitioners should be aware of these. Suspected cases should be urgently investigated and treated to prevent further spread.
Increasing prevalence of HIV-2 and dual HIV-1-2 infections among high risk group hospital admitted patients in Mumbai (Bombay).
Between 1993 and 1996, we carried out a serological screening for differentially identifying HIV-1 and HIV-2 infections among the high risk group persons admitted in the various wards of BYL Nair Hospital, Mumbai, using the ImmunoComb kit. This study indicates that although HIV-1 is the predominant virus prevalent in Mumbai, dual HIV-1-2 and HIV-2 infections are gradually increasing.
Increasing prevalence of dual HIV-1-2 infections among voluntary blood donors in Mumbai (Bombay).
Between 1993 and 1996, we carried out a serological screening for differentially identifying HIV-1 and HIV-2 infections among the high risk group persons admitted in the various wards of BYL Nair Hospital, Mumbai, using the ImmunoComb kit. This study indicates that although HIV-1 is the predominant virus prevalent in Mumbai, dual HIV-1-2 and HIV-2 infections are gradually increasing.
New vaccines for disease prevention.
New vaccines are needed for the control of some existing as well as other new or emerging diseases. In the long run they can be made cost-effective with the application of modern methods of biotechnology and would thus save considerable expense and hardship suffered at present by mankind.
Enzymes--a review.
Enzymes are essential to life and catalyze various metabolic activities. They find application in a number of diseased conditions, and their scope is being widened as knowledge develops.
Prevalence of hepatitis C virus (HCV) infection in Mumbai.
A study was carried out to determine the prevalence of Hepatitis C virus (HCV) in Mumbai among certain high risk groups such as renal transplant recipients, multitransfused and haemodialysis patients; professional and voluntary blood donors and viral hepatitis cases for comparison. Repeated testing of 602 subjects for antibodies to HCV using a second generation ELISA assay (Abbott, USA) showed an overall prevalence of 16.9%. We found 36.4% of multitransfused patients, 27.8% of renal failure cases and 26.2% of renal transplant recipients to be seropositive. Voluntary blood donors in our series showed a surprisingly high prevalence of 15.9%, and this group needs further investigation. Fifty-six of these sera (of which 45 were anti-HCV positive) were tested for HCV RNA by PCR and 14(31.1%) of the seropositive samples were also HCV RNA positive. The present investigation not only shows a high prevalence of HCV in the study groups but also proves the presence of HCV genomes in a significant proportion.