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Rotavirus is a major cause of acute gastroenteritis (AGE) in children worldwide. However, rotavirus outbreak has rarely been reported in Indonesia. This study aims to identify the causative agent for AGE outbreak among children in Belu, East Nusa Tenggara, Indonesia in 2018. All the samples were negative for bacteria (Salmonella, V. cholera) and Norovirus. Ten out of 11 stool samples were rotavirus-positive by immunochromatography testing. Reverse-transcription polymerase chain reaction (RT-PCR) and phylogenetic analyses revealed that rotavirus G2P[4] was the possible causative agent for the AGE outbreak, although sample size was limited. These findings suggest that the AGE outbreak was caused by rotavirus G2P[4], highlighting the importance of rotavirus surveillance.

Background: Hepatitis A outbreaks were reported by the Lamongan District Health Office to the Surabaya Center for Environmental Health and Disease Control Engineering on January 16, 2018, indicated by an increase in hepatitis A cases in of G and S areas, B village. One of initial sufferer was students in High School X.. Purpose: This study aims to identify the epidemiological characteristics of hepatitis A outbreaks that occur in High School X and the risk factors. Methods: The investigation was carried out in an observational manner with a cross sectional approach. Data were collected by structured interviews, hepatitis A antibodies in blood samples assay, environmental observation, and water samples assay. Data were collected with purposive determination of respondents. Results: Hepatitis A outbreaks at High School X in Lamongan District take place from November 2017 to january 2018, with a target group of 33 students. The epidemic cased tends to be extend common source. Risk factors are contact history with patients, eating habits together in same place, mutual exchange and sharing same eating utensils, the lack of hygiene habit (such as washing hands with soap for students and food handlers), lack of hand washing facilities, bad sanitation, bad food hygiene management, and inadequate clean and hygienis water source. Conclusion: The outbreaks of hepatitis A was extended with the most important risk factors, i.e. lack of personal hygiene and sanitation of water sources.