A study in Singapore recently found that the fish which eaten raw or slighlty heat in hot porridge can carry Streptococcus Group B bacteria, the one which can cause meningoencephalitis in new born babies and encephalitis, sepsis in adults. Scientists believed eating raw fish is the cause of 2015 Streptococcus Group B outbeak. Full article: 

https://goo.gl/4w5RSz

Chau ML, Chen SL, Yap M, Hartantyo S, Chiew P, Fernandez CJ, et al. Group B Streptococcus Infections Caused by Improper Sourcing and Handling of Fish for Raw Consumption, Singapore, 2015–2016. Emerg Infect Dis. 2017;23(12):2002-2010. https://dx.doi.org/10.3201/eid2312.170596