"Gastrointestinal symptoms include abdominal pain, nausea and vomiting and complications like digestive bleeding, bowel obstruction, perforation and peritonitis can also arise", the paper warned.
"A previously healthy man was admitted with severe epigastric pain, vomiting and low-grade fever since the previous week", researchers wrote. The patient's symptoms "resolved immediately" when it was removed, the journal said.
However, the Centers for Disease Control says cases are showing up in the U.S. In such cases, it is possible to cough up the worm or remove it by hand.
The study's lead author says Japan typically sees the most cases of the parasitic herring worm disease. "One study showed that anisakis simplex (the species most commonly associated with human infections) was found in 39.4% of the fresh mackerel examined from different fish markets in Granada, Spain".
Waymo, Uber dispute referred to U.S. attorney for investigation
Levandowski has invoked his Fifth Amendment right against self-incrimination and refused to answer questions about the case. Among the documents were trade secrets and patents, including Waymo's proprietary LIDAR system, the company claims .
The condition, anisakiasis, results from a contamination by parasites.
The New York City Department of Health and Mental Hygiene requires that fish served raw, undercooked or marinated raw meals like ceviche must be frozen first to kill off parasites.
Scholars on the topic suggest the illness in general is under-estimated and under-diagnosed.
The Food and Drug Administration recommends freezing fish for several days, or cooking to at least 145 degrees Fahrenheit.