This story may mean the case of anisakis infestation is not a rare problem but it could occur around myself. Anisakis could be killed by freezing the food. Chewing when eating certain food is also helpful to kill it. The gastric acid might be also a barrier to have Anisakis reach the gastric wall. But some could reach the gastric wall and infest it causing very bad stomachache. In the case of stomachache by Anisakis, you should undergo an endoscopic procedure and take it away from the stomache.
It is quite problematic that fresh raw seafood could cause this problem more easily. I have had raw seafood for thousands of times without any stomachache. There could be some genetic vulnerability for this infestation. I should study about that. But no one could assure I won't have the problem tomorrow. So Dennis' comment on the risk of parasite infection is not negligible. And Don's belief Kirin would pasteurize the parasite doesn't seem practical either.
PS:After uploading this article, I found this review abstract. It won't mention about the genetic diversity in host defence against this parasite. There seem to be two pathophysiological causing problems in human being. One is the direct infestation. The other is an anaphylaxis via specific IgE. The immunogenetic factor must be involved in the latter. The severer allergological symptoms should occur only in selected cases determined by the immunogenetic trait.
Eur Ann Allergy Clin Immunol. 2012 Aug;44(4):150-6.
Anisakis simplex: current knowledge.
SourceClinical Allergy and Immunology Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, via Pace, 9, 20122 Milan, Italy. email@example.com
Anisakiasis, firstly described in 1960s in the Netherlands, is a fish-borne parasitic disease caused by the consumption of raw or undercooked fish or cephalopods contaminated by third stage (13) larvae of the Anisakidae family, in particular Anisakis simplex (As), A. pegreffii and Pseudoterranova decipiens. Every year, approximately 20,000 cases of anisakiasis were reported worldwide, over 90% are from Japan and most others in Spain, the Netherlands and Germany, depending on the habits of fish consuming. Live As larvae can elicit i) a parasitic infection of the digestive tract or, occasionally, other organs, causing erosive and/or haemorrhagic lesions, ascites, perforations until granulomas and masses, if larva is not removed, and ii) allergic reactions, as anaphylaxis, acute/chronic urticaria and angioedema. Like other parasite infestations, As larva induces an immune adaptive response characterised by T-lymphocyte proliferation with polyclonal and monoclonal (responsible for As allergic symptoms) IgE production, eosinophilia and mastocytosis. Several As allergens, many of which thermostable, were described In particular the major allergen Ani s 1 and Ani s 7 could characterized a past or a recent infection. There is a general agreement that an active infection is required to initiate allergic sensitivity to Anisakis. Until now, the only effective treatment for anisakiasis is the endoscopic removal of live larvae and the best protection against anisakiasis is to educate consumers about the dangers of eating raw fish and to recommend avoiding the consumption of raw or inadequately thermally treated marine fish or cephalopods.