A twist louse was attain live in a young cleaning woman ’s faucial tonsil just a few days after she ate sashimi .

The 25 - yr - older woman come to St Luke ’s International Hospital in Tokyo with complaint of a sore throat . Reported inthe American Journal of Tropical Medicine and Hygiene , doctors peered into the patient ’s mouth and note a moving worm horn in out of her left over tonsil .

Once removing the invader with a pair of pincer , the alive louse was feel to be3.8 centimeter ( 1.5 column inch ) long , black in colour , and cylindrical like an earthworm . Fortunately , she quickly recovered after the brief routine and her bloodline trial   showed no sign of the zodiac of any complications .

The insect in question ( range below ) belongs to a mintage known asPseudoterranova azarasi , an uncommon parasitical nematode worm that populate in Pisces and marine mammals during certain stage of its animation wheel . By no conjunction , the patient pronounce she ’d been having symptoms , namely a sore throat , for 5 day that arise shortly after she eat sashimi , a Nipponese delicacy consisting of fresh bare-assed fish or nitty-gritty sliced into thin pieces .

Doctor of the Church have documented one C ofsimilar casesinvolving interchangeable species ofPseudoterranovaworms after citizenry have eaten naked as a jaybird fish . It ’s sometimes dubbed “ tingling pharynx syndrome ” as it have symptoms such as a sore pharynx , a prickle sensation , and a cough . Eating raw Pisces the Fishes alsoincreases your riskof contracting tapeworm , ribbon - similar worm that tend to inhabit in your digestive tract and can cause a range of gastrointestinal symptoms , such as nausea , loss of appetite , abdominal bother , and diarrhea .

This new case study also notes that there ’s beena notable step-up in such casesfollowing a   rise in popularity of sashimi and sushi across the world .   While not all sashimi is riddled with gross worms that can hide in your tonsils , eating raw seafood does increase one ’s   risk of foodborne illness because fake usually   kills most would - be invader , whether it ’s bacterial , viral , or a sponge .

However , so - call “ sushi - gradation ” Pisces the Fishes that ’s prepared raw is deeply frozen to free the fish of any parasitic insect . UnderUS guidepost , this typically regard one of three unconscious process : freezing at -20 ° C ( -4 ° fluorine ) or colder for 7 days , stop dead at -35 ° C ( -31 ° F ) or cold until firm and storing at the same temperature for 15 hours , or freezing at -35 ° C ( -31 ° F ) until solid and storing it at -20 ° C ( -4 ° F ) or below for 24 hours . interchangeable standards exist throughoutthe European Union and other part of the world .

That said , these processes are not foolproof and are thought to be less effective for roundworms and flukes . It also does n’t kill off bacteria that can make you sick , although it does slow its ontogenesis .

loosely verbalise , however , the hazard of getting a parasite from eat raw sashimi or sushi isrelatively   low , especially if it ’s been well - prepare at a eatery with good wellness and hygienics standards .

So , nevermind the nematode and go along the soy sauce .