Since it was first identified, Zika has been found in more than 27 countries and territories. Following the initial Zika outbreak in Northeastern Brazil in May 2015, physicians observed a very large surge of reports of infants born with microcephaly, with 20 times the number of expected cases. Many of these cases have since been confirmed, leading WHO officials to project that approximately 2,500 infants will be found to have born in Brazil with Zika-related microcephaly.Proving that Zika causes these effects was difficult and complex for several reasons. For example, the effects on an infant might not be seen until months after the mothers initial infection, long after the time when Zika is easily detected in the body. In addition, research was needed to determine the mechanism by which Zika produced these effects.Since the initial outbreak, studies that use several different methods found evidence of a link, leading public health officials to conclude that it appears increasingly likely the virus is linked to microcephaly and miscarriage. On 1 February 2016, the World Health Organization declared recently reported clusters of microcephaly and other neurological disorders a Public Health Emergency of International Concern (PHEIC). On 8 March 2016, the WHO Committee reconfirmed that the association between Zika and neurological disorders is of global concern.The Zika virus was first linked with newborn microcephaly during the Brazil Zika virus outbreak. In 2015, there were 2,782 suspected cases of microcephaly compared with 147 in 2014 and 167 in 2013.
With advances in diagnosis and management, the mortality rate from acute gastric volvulus is 15–20% and that for chronic gastric volvulus is 0–13%. References
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Schaefer D, Nikoomenesh P, Moore C (1997). "Gastric volvulus: an old disease process with some new twists". Gastroenterologist. 5 (1): 41–5. PMID 9074918.