Detection and genetic characterization of rotavirus infections in non-hospitalized children with acute gastroenteritis in Japan, 2007–2009

Rotaviruses are the most common cause of severe viral gastroenteritis in early childhood worldwide. Thus, the objectives of our study were to determine the molecular epidemiology and the clinical features of rotavirus gastroenteritis in Tunisia. Between January 2003 and April 2007, a prospective study was conducted on 788 stool samples collected from children under 12 years of age who were suffering from acute gastroenteritis. Rotavirus was detected by multiplex RT-PCR in 27% (n = 213) of samples, among them 79.3% (n = 169) cases were monoinfections. The frequency of rotavirus infections was significantly higher among inpatients (29%) than among outpatients (13%) (P < 0.001). The seasonal distribution of rotavirus diarrhea showed a winter peak, with an unusual peak from June to September. The mean duration of hospitalization was 6.5 ± 8.1 days and the mean age was 15.8 ± 22.8 months for rotavirus monoinfections. Fever, vomiting, abdominal pain, and dehydration were observed in 88, 98, 13, and 80 cases, respectively, in children with rotavirus monoinfections. G3P[8] (45.6%) and G1P[8] (23.9%) were the most common genotypes found in our study. The determination of rotavirus infection prevalence and the characterization of the rotavirus strains circulating will help us to better understand the molecular biology and epidemiology of the disease in our country.

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The evolving epidemiology of acute gastroenteritis in hospitalized children in Italy

European Journal of Pediatrics ◽

10.1007/s00431-021-04210-z ◽

2021 ◽

Author(s):

Brigida Stanyevic ◽

Margherita Sepich ◽

Samanta Biondi ◽

Giampiero Igli Baroncelli ◽

Diego Peroni ◽

...

Keyword(s):

Acute Gastroenteritis ◽

Viral Infections ◽

Selection Process ◽

University Hospital ◽

Hospitalized Children ◽

Rotavirus Vaccines ◽

Number Of Patients ◽

Causative Agents ◽

Few Data ◽

Rotavirus Infections

AbstractFew data are available on the prevalence and features of acute gastroenteritis (AGE) in hospitalized children in Italy, where specific rotavirus vaccines were introduced into the national vaccination plan in 2017. To evaluate vaccination effects on AGE epidemiology, we analysed data from children aged ≤ 18 years admitted for AGE at the University Hospital of Pisa in 2019, comparing them with those recorded in 2012. Demographical, clinical, diagnostic, and treatment data were collected reviewing medical records and were therefore compared. In 2019 and 2012, 86 (median age 2.5 years [IQR 1.4–5.9]) and 85 children (median age 2.3 years [IQR 1.3–5.1]) were respectively admitted with AGE. The most common symptoms were diarrhoea and vomiting; decreased skin turgor was more frequent in 2019 (54% and 34% respectively, p = 0.01). Viral infections were more common than bacterial ones; in 2019, a decrease in rotavirus infections (67% and 22%, p = 0.003) and an increase in adenovirus infections (50% and 10%, p = 0.002) and in the number of patients with negative stool testing (58% and 39%, p = 0.04) were found.Conclusions: Viral infections are the leading cause of AGE in hospitalized children in Italy. The introduction of rotavirus vaccines did not reduce the number of hospitalizations per year. Adenovirus and other non-routinely screened viruses may be undergoing a selection process making them common causative agents for AGE. What is Known:• Rotavirus is the leading cause of acute severe gastroenteritis in children worldwide, especially < 5 years of age.• The introduction of specific vaccines may be changing its epidemiology.• Few data are available on acute gastroenteritis in hospitalized children in Italy. What is New:• Viral infections are the leading cause of acute gastroenteritis in hospitalized children in Italy.• Specific vaccines are reducing rotavirus infections, but adenovirus and other non-routinely screened viruses may be undergoing a selection process making them common causative agents for gastroenteritis.

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