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Introduction Coronavirus pandemic-initiated Wuhan city, Hubei Province, China. It mainly involves respiratory system and cause fever, cough. However, it has other manifestations such as GI system, CNS and skin involvement. It is transmitted mostly through respiratory system, but some researchers claim that in can potentially spread by oral, fecal or intestinal gas. During colorectal surgeries such as volvulus sigmoid, surgeons are at risk of exposure to intestinal gas. Case presentation A 57-year-old mentally retarded man came to our emergency department with complain of abdominal pain, constipation, obstipation, nausea, vomiting and abdominal distention. His vital sign was stable and his laboratory data revealed no abnormality. His abdominal x-ray showed intestinal obstruction with suspicious of sigmoid volvulus. His PCR for COVID 19 was positive and his chest CT scan has manifestations of lung involvement. He was proceeded for surgery. Conclusion Owing to odds of spread of coronavirus through intestinal gas, in this case, sigmoid colon was removed without evacuation of intestinal gas., Highlights • Covid-19 involves respiratory system and cause fever, cough. • COVID19 is a strong pathogenic virus which mainly transmit throw respiratory system. • It there are potential way of transmission such as oral-fecal and throw intestinal gas. • We introduce a new technic in sigmoid volvulus surgery to reduce risk of contamination.