Project description:Co-hybridization of Adenovirus type 40 and 41 to test probe specificity for closely related viral targets. ATCC strains of Adenovirus type 40 and 41 were hybridized to the array as a control run and a proof of concept. Degree of cross hybridization between polio nucleic acid and non-adenovirus 40 and 41 probes was evaluated. Specificity of the probe design was determined between closely related members of the same virus family. Keywords: control study: target detection and specificity
Project description:Co-hybridization of Adenovirus type 40 and 41 to test probe specificity for closely related viral targets. ATCC strains of Adenovirus type 40 and 41 were hybridized to the array as a control run and a proof of concept. Degree of cross hybridization between polio nucleic acid and non-adenovirus 40 and 41 probes was evaluated. Specificity of the probe design was determined between closely related members of the same virus family. Keywords: control study: target detection and specificity 2 lab strains of adenovirus (type 40 and 41) were extracted directly from ATCC samples. Viral DNA was was extracted and labeled with Cy3 and Cy5 dyes for Adenovirus type 40 and 41 respectively.
Project description:BackgroundThe application of molecular diagnostics has identified enteric group adenovirus serotypes 40 and 41 as important causes of diarrhea in children. However, many aspects of the epidemiology of adenovirus 40/41 diarrhea have not been described.MethodsWe used data from the 8-site Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development Project birth cohort study to describe site- and age-specific incidence, risk factors, clinical characteristics, and seasonality.ResultsThe incidence of adenovirus 40/41 diarrhea was substantially higher by quantitative polymerase chain reaction than enzyme immunoassay and peaked at ∼30 episodes per 100 child-years in children aged 7-15 months, with substantial variation in incidence between sites. A significant burden was also seen in children 0-6 months of age, higher than other viral etiologies with the exception of rotavirus. Children with adenovirus 40/41 diarrhea were more likely to have a fever than children with norovirus, sapovirus, and astrovirus (adjusted odds ratio [aOR], 1.62; 95% CI, 1.16-2.26) but less likely than children with rotavirus (aOR, 0.66; 95% CI, 0.49-0.91). Exclusive breastfeeding was strongly protective against adenovirus 40/41 diarrhea (hazard ratio, 0.64; 95% CI, 0.48-0.85), but no other risk factors were identified. The seasonality of adenovirus 40/41 diarrhea varied substantially between sites and did not have clear associations with seasonal variations in temperature or rainfall.ConclusionsThis study supports the situation of adenovirus 40/41 as a pathogen of substantial importance, especially in infants. Fever was a distinguishing characteristic in comparison to other nonrotavirus viral etiologies, and promotion of exclusive breastfeeding may reduce the high observed burden in the first 6 months of life.