Frequency of Epstein - Barr virus infection as detected by messenger RNA for EBNA 1 in histologically proven gastric adenocarcinoma in patients presenting to a tertiary care center in South India.

Background: Epstein–Barr virus (EBV)‑associated gastric carcinoma is a relatively uncommon entity detected in approximately 10% of gastric adenocarcinoma. Objective: The purpose of this study is to estimate the frequency of EBV‑associated gastric carcinoma and also to assess the nature of presentation, any significant difference between this subgroup and EBV‑negative gastric adenocarcinomas with respect to age and sex predilection, lymph nodal status, site of presentation. Materials and Methods: We prospectively analyzed 100 cases of gastric adenocarcinoma who underwent either a partial or total gastrectomy during the period from March 2010 to August 2011. The tumour and the corresponding normal gastric tissue from the same patient were analyzed for the presence of Epstein–Barr nuclear antigen 1 (EBNA1) messenger ribonucleic acid (mRNA) by real‑time polymerase chain reaction (PCR). Result: EBV was detected in 6% cases of gastric adenocarcinoma. All the positive patients were males. The majority of cases involved the proximal stomach and there was variable lymph nodal involvement. Conclusion: Our study endorses that there is an association between EBV infection and gastric adenocarcinoma in the Indian population. There was no significant difference between this subgroup and EBV‑negative gastric adenocarcinomas with respect to age and sex predilection, lymph nodal status and site of presentation. Short‑term follow‑up of this subgroup of patients seems to indicate a good overall prognosis after appropriate treatment. However, a larger study with long‑term follow‑up is needed to further establish the role of EBV in gastric adenocarcinoma in this study population.

Comparison of HIV-1 RNA level estimated with plasma and DBS samples: A pilot study from India (South).

Purpose: The use of dried blood spots (DBS) for HIV-1 viral load determination could greatly enhance the management of HIV infected individuals in resource-limited countries. Objective: To compare the HIV-1 viral load values obtained between parallel collected plasma and DBS. Materials and Methods: DBS and plasma samples were collected from 62 HIV-1 infected individuals and were used for determination of HIV-1 RNA concentrations using the Abbot real-time HIV-1 PCR. Result: Mean of the log difference of viral load values between plasma and DBS was -0.41 log. DBS viral load values significantly correlated with plasma viral load (r = 0.9818, P < 0.0001). Conclusion: These results suggest that DBS samples can be used as an alternative to plasma for the estimation of HIV-1 viral load if samples are appropriately stored.