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  • Title: RT-PCR based diagnosis revealed importance of human group B rotavirus infection in childhood diarrhoea.
    Author: Barman P, Ghosh S, Samajdar S, Mitra U, Dutta P, Bhattacharya SK, Krishnan T, Kobayashi N, Naik TN.
    Journal: J Clin Virol; 2006 Jul; 36(3):222-7. PubMed ID: 16765641.
    Abstract:
    BACKGROUND: Human group B rotavirus was first identified as causative agent of a large outbreak of severe gastroenteritis affecting more than 1 million people, predominantly adults in China in 1982-1983. In spite of serological evidences for the presence of group B rotavirus in many countries of the world, the virus has been detected only from China, India and Bangladesh, where most of the cases were from adults. OBJECTIVES: To ascertain the role of group B rotavirus as an aetiological agent of diarrhoea among children in Kolkata, India. STUDY DESIGN: An active surveillance was conducted for rotavirus infection in children in a leading referral paediatric hospital and a few samples were also collected from adults of another hospital in Kolkata, India over a period of 3 years (2002-2004). After primary screening of rotaviruses by RNA electrophoresis in polyacrylamide gel, 200 of 412 samples negative by PAGE were screened by reverse transcription polymerase chain reaction for group B rotaviruses. The group B rotavirus positives samples were also confirmed by dot-blot hybridization. RESULT: During the study period, we detected 37 (18.5%) sporadic cases of human group B rotavirus infection in children below 3 years of age of which 15 (7.5%) showed mixed infection with group A rotaviruses by RT-PCR. In dot-blot hybridization studies the RNA of all rotavirus positive samples hybridized with the nonisotopic psoralen-biotin labeled total RNA probe generated from a human group B rotavirus CAL-1 strain confirming the samples as group B rotaviruses. CONCLUSION: The shift in age preference of group B rotavirus infection from adult to children and mixed infection of group B and group A rotaviruses reveals the importance of group B rotavirus as an etiological agent of childhood diarrhoea. Therefore, future vaccination strategy should include both group A and B rotaviruses to control rotavirus diarrhoea.
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