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The present work is an attempt to develop transgenic hairy root system in Camellia assamica, using leaves infected by Agrobacterium rhizogenes strain LBA9402, harboring binary vector (pART27 and pBI121) carrying β-glucuronidase (gus) as reporter gene and neomycin phosphotransferase (nptII) as selection marker. The transformed hairy roots were grown in phytohormone free MS media in the presence of kanamycin 50 µg/ml. The incorporation and expression of foreign genes were checked by initial gus assay followed by PCR analysis for the presence of nptII and β-glucuronidase (gus) gene. This protocol therefore facilitates the study of gene expression system in general and for root functional genomics in particular, giving scope for transgenic hairy roots as future explants for secondary metabolite production and plantlet regeneration.

Data are presented for the inorganic chemical constituents of tea leaf collected from four different clones grown in Assam. Samples were collected on three different dates during the period July to September, 1g56. Analyses were made separately of bud, 1st leaf, etc. The data presented show that chemical composition of tea leaf varies not only with physiological age and date of sampling but also with the clones.

Context: Healthcare workers (HCWs) were at the front line of the COVID-19 (corona virus disease-19) pandemic management and were at higher risks of contracting SARS-CoV-2 due to occupational exposure. The objectives of the present study were to estimate the antibody response to SARS-CoV-2 among COVID-19-positive HCWs and its persistence in subsequent follow-up samples and to compare antibody response between rapid antigen/real time polymerase chain reaction (RT-PCR) groups. Settings and Designs: This hospital-based cross-sectional study was carried out in Assam Medical College. Materials and Methods: Inclusion criteria were SARS-CoV-2 test, which was confirmed in HCWs. A total of 127 HCWs were included. The samples were tested for SARS-CoV-2 IgG by qualitative indirect ELISA using InBios SCoV-2 DetectTM IgG kit. First sample was collected from 25th day to 35th day of SARS-CoV-2. First and second follow-up samples were collected in 3 and 6 months, respectively. Statistical Analysis Used: Epi Info version 7 was used. The χ2 test was done. Results: A total of 69% male and 31% female HCWs were included. Most of them were in the 20–29 years age group (48%). About 92% were symptomatic and 20% had comorbidities. Overall seroconversion was 88% (RAT category 98.61% and RT-PCR 74.55%). Symptomatic category showed 90.68% seropositivity. The follow-up at the 3rd and 6th month showed 93.85% and 88.24% seropositivity, respectively. Conclusion: Rapid antigen test-positive symptomatic people have more chances of development of antibodies within a period of 1 month and sustained for more than 6 months in their blood.