Table 6.  Numbers of anisakiasis cases with a history of skipjack tuna (Katsuwonus pelamis) and mackerel (Scomber spp.) ingestion in 2018, and the numbers of larvae detected per patient in Tokyo, Japan.

No. of Anisakis larvae per patient	Skipjack tuna (ingestion of only skipjack tuna)	Mackerel* (ingestion of only mackerel)
A. simplex sensu stricto
1	19 (11)	24 (8)
2	2 (1)	7 (4)
3	1 (1)	0
4	0	1 (0)
5	1 (0)	0
A. pegreffii
1	0	1 (1)
2	0	0
Total cases	23 (13)	33 (13)

Anisakiasis cases were examined numbers at the Tokyo Metropolitan Institute of Public Health.

*Mackerels included in Scomber japonicus and S. australasicus.