Species identification of ciguatoxin-carrying grouper implicated in food poisoning.
Food poisoning due to ingestion of an unknown red grouper occurred in southern Taiwan. To identify the species of toxic red grouper implicated in food poisoning, a 475-bp sequence of the cytochrome b gene from six species of fresh red grouper meat was amplified by using a pair of primers (L14735/H15149). This fragment could be amplified when fish meat was treated with different heating processes. After sequencing, it was found that no variation in sequences was detected among individuals within each species. The species of toxic red grouper meat implicated in food poisoning was judged to be Lutjanus bohar based on sequence analysis. In addition, restriction enzyme analysis with HaeIII rapidly distinguished these six species of red grouper and the two samples implicated in food poisoning. No toxicity of viscera in 18 specimens of six red grouper species was detected, but two food poisoning samples were found to be toxic. This study indicated that DNA sequence and restriction enzyme analysis are powerful methods for identifying potentially toxic red grouper species as L. bohar.
Hsieh
Cheng-Hong
CH
Department of Applied Life Science, Asia University, Taichung County, Taiwan.
Hwang
Ken-Lin
KL
Lee
Ming-Ming
MM
Lan
Chi-Hsun
CH
Lin
Wen-Feng
WF
Hwang
Deng-Fwu
DF
D000818:Animals; D036841:Ciguatera Poisoning / Q000175:diagnosis* / Q000453:epidemiology; D002922:Ciguatoxins / Q000032:analysis*; D003257:Consumer Product Safety; D003573:Cytochrome b Group / Q000235:genetics*; D017931:DNA Primers; D005506:Food Contamination / Q000032:analysis; D005516:Food Microbiology; D010473:Perciformes; D016133:Polymerase Chain Reaction / Q000592:standards*; D012150:Polymorphism, Restriction Fragment Length; D017747:Seafood / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D013624:Taiwan
D003573:Cytochrome b Group; D017931:DNA Primers; D002922:Ciguatoxins