A Brief Review on Anti-Microbial Activity of Pergularia Daemia Linn

Norovirus is a highly contagious, non-enveloped RNA virus that is recognized as the leading cause of acute gastroenteritis across all age groups globally. It belongs to the Caliciviridae family and is transmitted primarily through the fecal-oral route, contaminated food and water, direct person-to-person contact, and contact with contaminated surfaces. Norovirus infections can occur year-round but are more prevalent during the winter months, often leading to outbreaks in closed and semi-closed communities such as hospitals, schools, cruise ships, and nursing homes. Clinically, norovirus infection is characterized by a sudden onset of nausea, vomiting, watery diarrhea, abdominal cramps, and sometimes low-grade fever, with symptoms typically lasting 1 to 3 days. While most cases are self-limiting, severe dehydration and complications can occur, especially in young children, the elderly, and immunocompromised individuals. The virus exhibits high genetic diversity, with genogroup II, particularly GII.4 variants, being the most prevalent in human infections. This diversity, along with short-lived immunity following infection, contributes to frequent reinfections and challenges in vaccine development. Diagnosis is primarily made using reverse transcription polymerase chain reaction (RT-PCR) testing of stool samples. Currently, there is no specific antiviral treatment or licensed vaccine for norovirus; management is supportive, focusing on hydration and symptomatic relief. Preventive strategies rely on strict hygiene practices, including handwashing, disinfection of surfaces, and proper food handling. Given its rapid transmission, low infectious dose, and environmental stability, norovirus remains a significant public health burden worldwide, causing hundreds of millions of cases and thousands of deaths annually. Ongoing research efforts are aimed at understanding its pathogenesis, improving diagnostic tools, and developing effective vaccines to reduce the global impact of norovirus-associated disease.