Browsing by Author "Daniel, D"
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Item Frequency of HIV type 2 infections among blood donor population from India: A 10-year experience.(2010-04) Kannangai, R; Nair, S C; Sridharan, G; Prasannakumar, S; Daniel, DPurpose: In India, HIV-2 epidemic is alongside with HIV-1. Blood banks are introducing nucleic acid testing (NAT) for screening. The limitation of NAT systems is the inability to detect HIV-2. Materials and Method : An analysis of HIV screening of a blood bank at a tertiary care center from 1998 to 2007 was carried out. Results : A total of 175026 donors were screened by serological assays and 789 were reactive for HIV antibody. Only 478 (61%) were confirmed positive by Western blot/immunoblot. There were 465 (97.2%) donations positive for HIV-1, 6 (1.3%) for HIV-2 (monotypic infection) and 7 (1.5%) for HIV-1 and HIV-2 (dual infection). Conclusion : We show the presence of HIV-2 infection among the blood donors and the need for incorporating HIV-2 detection also in the NAT systems.Item Novel digestion patterns with hepatitis B virus strains from the Indian subcontinent detected using restriction fragment length polymorphism.(2008-01-30) Vivekanandan, P; Daniel, H D J; Raghuraman, S; Daniel, D; Shaji, R V; Sridharan, G; Chandy, G; Abraham, PItem A pilot study of HTLV-I infection in high-risk individuals & their family members from India.(2001-06-31) Ramalingam, S; Kannangai, R; Prakash, K J; Ajithkumar, K; Jacob, M; George, R; Pradeepkumar, S; Daniel, D; Dennison, D; Babu, P GBACKGROUND & OBJECTIVES: Human T lymphotropic virus-I (HTLV-I) has been associated with adult T cell lymphoma/leukemia (ATLL). There are Indian studies on HTLV-I infection among people with sexually transmitted infection, but no large study has been conducted on individuals with haematological malignancies. In this group of individuals, serology is known to under-diagnose HTLV-I infection. This study was carried out to identify serologically and where possible with molecular techniques, HTLV-I infection in individuals with haematological malignancies. To understand the modes of transmission, family members of individuals with proven HTLV-I infection were also studied. Individuals with sexually transmitted infection (STI), blood donors and pregnant women were also studied. METHODS: Particle agglutination test was used to detect antibody to HTLV-I. HTLV genome was amplified by polymerase chain reaction (PCR) and detected with probes by digoxiginin (Dig) ELISA. RESULTS: There was no serological evidence of HTLV-I infection among the healthy blood donors and pregnant women studied. High prevalence of anti-HTLV-I antibody was identified in the patients with haematological malignancies (8 of 86 patients, 9.3%) and a lower prevalence in individuals with STI (8 of 670 individuals, 1.2%). In the STI group, all 8 individuals seroreactive to HTLV-I were coinfected with human immunodeficiency virus (HIV). In the group with haematological malignancies, three of 22 (13.6%) patients with leukemia, 3 of 11 (27.3%) with cutaneous T-cell lymphoma (CTCL) and 2 of 53 (3.8%) with lymphoma were reactive for anti-HTLV-I antibody. In this group, PCR identified all the seroreactive individuals tested. There were also seronegative infected individuals who were only identified by PCR. There was also a large number of seronegative family members who were only positive by PCR. INTERPRETATION & CONCLUSION: The study revealed a strong disease association of HTLV-I with haematological malignancies and evidence for both horizontal and vertical transmission of the infection in the Indian population. HTLV-I infection appears to be common among family members of individuals with HTLV-I associated haematological malignancies.