Burden and genotyping of rotavirus disease in the United Arab Emirates: a multicenter hospital-based surveillance.

Rotavirus (RV) is the most common etiological agent causing acute gastroenteritis (GE) in children aged <5 years. This cross-sectional, hospital-based surveillance study (NCT01201252) was designed to investigate RVGE disease burden. It was conducted from July 2009-July 2010 at 3 referral hospitals in the United Arab Emirates (UAE). Children who had been hospitalized for acute GE were enrolled with informed consent. Stool samples were tested for RV using enzyme immunoassay and RV-positive samples were further typed using reverse transcriptase-polymerase chain reaction and reverse hybridization to determine the G and P types. GE data were collected from medical charts and GE severity was assessed through clinical examination. Treatment and outcome were prospectively recorded. Among 6323 children hospitalized due to any reason, 771 (12.2%) presented acute GE and were enrolled, of whom 758 (98.3%) were included in the final analysis. Acute GE and RVGE accounted for 12.0% (758/6323) and 6.0% (381/6323) of all hospitalizations, respectively. RVGE accounted for 50.3% (381/758) of GE hospitalizations and predominantly affected, children younger than 2 years (66.1%; 252/381). The severity of GE before hospitalization was significantly associated with RV-positive status (P = 0.0031). The majority (>95%) of children received intravenous hydration during hospitalization. RVGE occurred throughout the year, with a subtle winter peak in February 2010 (63.6%; 56/88). G1WTP[8]WT was the most commonly detected RV strain (56.3%) in 268 analyzed samples. RV was a major cause of GE-hospitalizations in children under 5 years in the UAE; the highest number of RVGE cases was observed in children younger than 2 years.