Tetrodotoxin Poisoning Due to Pufferfish and Gastropods, and Their Intoxication Mechanism

Table 7

Toxicity of cultured pufferfish liver (1982–2009).

Culture	Year of collection	Age	Number of collection	Toxicity (MU/g)
Sea	1981–2003	1–3	4258	<2–<10
Land			4504	<2–<8
open system	2001–2009	1-2	4173
closed system	2008-	1-2	331
Total			8762