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Here, we present the molecular epidemiology of HAdV and classic HAstV in children with acute diarrhea in Shanghai.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Fecal specimens were collected from 804 outpatient infants and young children diagnosed with acute diarrhea in Shanghai from January 2017 to December 2018. All of the samples were screened for the presence of HAdV and classic HAstV. HAdV and classic HAstV were detected using traditional PCR and reverse-transcription PCR, respectively. All of the HAdV and classic HAstV positive samples were genotyped by phylogenetic analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Among the 804 fecal samples, 8.58% (69\/804) of samples were infected with either HAdV or classic HAstV, and five were co-infected with two diarrhea viruses. The overall detection rates of HAdV and classic HAstV were 3.47% (28\/804) and 5.22% (42\/804), respectively. Four subgroups (A, B, C, and F) and seven genotypes (HAdV-C1, \u2212C2, \u2212B3, \u2212C5, \u2212A31, \u2212F40, and -F41) of HAdV were detected. Subgroup F had the highest constituent ratio at 64.29% (18\/28), followed by non-enteric HAdV of subgroup C (21.43%, 6\/28) and subgroup B 10.71% (3\/28). HAdV-F41 (60.71%, 17\/28) was the dominant genotype, followed by HAdV-C2 (14.29%, 4\/28) and HAdV-B3 (10.71%, 3\/28). Two genotypes of classic HAstV (HAstV-1 and HAstV-5) were identified in 42 samples during the study period; HAstV-1 (95.24%, 40\/42) was the predominant genotype, and the other two strains were genotyped as HAstV-5. No significant differences were found between boys and girls in the detection rates of HAdV (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.604) and classic HAstV (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.275). Over half of the HAdV infections (82.14%, 23\/28) and classic HAstV infections (66.67%, 28\/42) occurred in children less than 36\u2009months. Seasonal preferences of HAdV and classic HAstV infections were summer and winter, respectively. In this study, the common clinical symptoms of children with acute diarrhea were diarrhea, vomiting, fever and abdominal pain.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our findings indicate that HAdV and classic HAstV play important roles in the pathogenesis of acute diarrhea in children in Shanghai. Systematic and long-term surveillance of HAdV and classic HAstV are needed to monitor their prevalence in children and prevent major outbreak.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12879-021-06403-1","type":"journal-article","created":{"date-parts":[[2021,7,29]],"date-time":"2021-07-29T11:09:01Z","timestamp":1627556941000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Molecular and epidemiological characterization of human adenovirus and classic human astrovirus in children with acute diarrhea in Shanghai, 2017\u20132018"],"prefix":"10.1186","volume":"21","author":[{"given":"Lijuan","family":"Lu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huaqing","family":"Zhong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Menghua","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liyun","family":"Su","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingfeng","family":"Cao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ran","family":"Jia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,7,29]]},"reference":[{"issue":"7","key":"6403_CR1","doi-asserted-by":"publisher","first-page":"580","DOI":"10.1097\/INF.0000000000002637","volume":"39","author":"N Sharif","year":"2020","unstructured":"Sharif N, Nobel NU, Sakib N, Liza SM, Khan ST, Billah B, et al. 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