title: [Analysis of paralytic shellfish poison of bivalves in seafood market in Guangzhou].
abstract: OBJECTIVE
  The investigations of the paralytic shellfish poisoning (PSP) from Huangsha seafood market of Guangzhou was performed to assess the risk of PSP in bivalves.
  
  
  METHODS
  The concentration and profiles of PSP toxins in bivalves were determined by mouse bioassay of AOAC and high-performance liquid chromatography (HPLC). The risk assessment of PSP in bivalves was conducted with FAO and Chinese Administration Organization of Fish Culture and Seaport.
  
  
  RESULTS
  The content of PSP detected was lower than the safe standard (4 MU/g meat) in all of the 84 samples, one of which had the highest toxicity with 1.84 MU/g muscle. These results suggested that the bivalves in seafood market was safe to feed. It was 9 samples' gland in 2 species that be detected to have PSP in the bivalves being researched, the muscles had few PSP. The concentration of PSP in one sample's gland exceeded the threshold of FAO (4 MU/g) with 14.52 MU/g meat, and the profiles of PSP in the gland were B1, GTX2/3, GTX1/4 and C according to HPLC.
  
  
  CONCLUSIONS
  These results suggested that both of the concentration and detection rate of PSP of bivalves in seafood market in Guangzhou were low as a whole, but the content and discovery rate of PSP were far higher in glands than in the muscles, and the PSP content in one gland exceeded the threshold of Standard. The levels of PSP contamination in shellfish was characteristic of season. The toxins level in shellfish were the maximum in spring, but the frequency of toxins detected in shellfish was higher in summer and autumn, so the detection and risk assessment of PSP in bivalves from seafood market was essential in the future.
authors.affiliation: Department of Biotechology, Jinan University, Guangzhou 510632, China.
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Nie
authors.forename: Tian-Jiu
authors.initials: TJ
authors.lastname: Jiang
authors.forename: Wei-Dong
authors.initials: WD
authors.lastname: Yang
authors.forename: Jie-Sheng
authors.initials: JS
authors.lastname: Liu
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000737:chemistry*; D002681:China; D005506:Food Contamination / Q000032:analysis*; D008387:Marine Toxins / Q000032:analysis* / Q000378:metabolism / Q000506:poisoning; D012530:Saxitoxin / Q000031:analogs & derivatives / Q000032:analysis; D012621:Seasons; D012758:Shellfish / Q000032:analysis*; D057096:Shellfish Poisoning / Q000517:prevention & control*
chemical_list: D008387:Marine Toxins; D012530:Saxitoxin; C013007:gonyautoxins