普遍來說,雞肉和豬肉我們通常都會煮熟才吃,但牛肉就偏偏可以選擇幾成熟來品嘗,究竟點解呢?789Please respect copyright.PENANAes8mSHg7L3789Please respect copyright.PENANAS1Z91fNTCD
789Please respect copyright.PENANAaNP3lyGv4e
事實上,生吃食物始終會有一定風險,有機會導致食物中毒,純粹因為牛肉的風險相對比雞肉和豬肉較低,所以才有「生食」牛肉的選擇。789Please respect copyright.PENANAozFgGDSJLR
789Please respect copyright.PENANAFJ0dDVrVMu
近在2020年6月,美國號令回收4萬三千磅牛肉,原因就是化驗證實那批牛肉含有令人腹瀉的大腸幹菌,老是在美國牛肉常出現的O157:H7品種。789Please respect copyright.PENANA3FQ5cUofaD
(這不是食神劇情,而是確實新聞,Ref1)789Please respect copyright.PENANAQ9mpHZdMvA
789Please respect copyright.PENANA18C3hnZILr
而自從90年代發現這品種後,美國規定牛肉出售前必須測量是否含有某幾種令人肚瀉的大腸幹菌。這一次為何能夠流出市面,那就不得而知了。789Please respect copyright.PENANAXFg6Dcov2T
789Please respect copyright.PENANAPCFZskoQOo
789Please respect copyright.PENANAHtbJJFF49R
在繼續講解之前,我們先以超簡略的方式認識一下細菌的外部構造。(圖2)789Please respect copyright.PENANAqLYCpndkmI789Please respect copyright.PENANAlR4vn1W1qU
789Please respect copyright.PENANA0lqfUeyWkp
Capsule789Please respect copyright.PENANAkD2kzJt8J6
防止細菌脫水789Please respect copyright.PENANAToYqPi4wz6
保護自己免被人類的吞噬細胞吞噬789Please respect copyright.PENANAgqjw0zaiUX
789Please respect copyright.PENANAiDHHkScLzE
Pili789Please respect copyright.PENANAKgN38frsJZ
用來抓實接觸面,例如腸道壁膜,同時亦都可以用來幫助移動789Please respect copyright.PENANAPB7vSypKg6
789Please respect copyright.PENANArIeHY8XyBR
Flagellum789Please respect copyright.PENANAk1xrlz9Zam
會以螺旋槳的方式轉動,讓細菌可以隨意走動789Please respect copyright.PENANAWOmCfJeepM
789Please respect copyright.PENANAjBoWanRKwE
如有興趣想知道細菌和病毒的分別,可閱讀我之前所寫的文章789Please respect copyright.PENANAe54oCZSUq6
https://www.penana.com/article/465358789Please respect copyright.PENANATIJhBd9dmJ
789Please respect copyright.PENANAh2Q4MkpyMR
789Please respect copyright.PENANA0NFzPYtlbc
(圖3)令人腹瀉的大腸幹菌有好多種,而經常因為食用未煮熟的牛肉而出現在新聞的是Shiga toxin-producing E. coli (STEC)。789Please respect copyright.PENANAoIvjloK7ra
顧名意義,它們能夠釋放Shiga toxin這有毒物質,而E coli則是大腸幹菌的簡稱。789Please respect copyright.PENANAnAdCAjotWU
789Please respect copyright.PENANAbEtGSroSdh789Please respect copyright.PENANAKWndBbIrbv
789Please respect copyright.PENANAn1RjBJBUcU
789Please respect copyright.PENANAe09c912mCL
O157:H7品種,就是STEC的一種,潛伏期為2-3日。它們被曾證實可以逗留在外間土壤21個月有多,只有70度以上高溫才能確保徹底消滅它們。789Please respect copyright.PENANACYNZBP9vzk
789Please respect copyright.PENANA6ogH0CkPwa
它們最為麻煩的地方,就是能夠抵禦胃酸,有能力從胃部游走到腸道。789Please respect copyright.PENANAfN81Yx0xML
到達腸道位置後,它們所釋放的Shiga toxin能夠對腸壁的細胞造成傷害,引致腹瀉及脫水。789Please respect copyright.PENANASDpowhWWJC
嚴重情況下更會引致溶血性尿毒綜合症(HUS),對腎臟造成長久傷害。789Please respect copyright.PENANAMqweKESK1b
789Please respect copyright.PENANA7hy6USEG5e
而最「令人意想不到」的是,此病絕對不可以用抗生素來醫治。789Please respect copyright.PENANANuVp0fnYt8
因為用抗生素來傷害它們的話,只會導致更多Shiga toxin從它們身上釋出體外,適得其反。789Please respect copyright.PENANATeCeawoDrd
789Please respect copyright.PENANAqyW2oOhgCL
通常情況下,醫生會抽取病人的糞便樣本,斷症腹瀉是否由STEC而起。789Please respect copyright.PENANAPvWC4IpU7Q
如果屬實,可以做的方法就是盡量讓病人補充水份,避免脫水情況過於嚴重,並等待身體自我康復。789Please respect copyright.PENANAUpnjqrGNky
789Please respect copyright.PENANAk5uydBzuAe
照這個情況來看,或者,侵侵吃Well Done牛排是有他的道理......789Please respect copyright.PENANAP42ea1d2sR
789Please respect copyright.PENANASxcOLWB7sM
當然,如果牛肉來貨沒有問題,而處理上一切衛生措施做足的話,應該不會引起太大問題的。789Please respect copyright.PENANAnT2NTwm5CP
789Please respect copyright.PENANAvfwJqoWwdi
至少我都暫時未試過因為食生牛扒而肚瀉。789Please respect copyright.PENANAwkN1yM7mkC
789Please respect copyright.PENANAtyyh5iPtSt
(在摸著木塊下的情況寫下這句。)789Please respect copyright.PENANAK1Jh6qSdKd
789Please respect copyright.PENANAzhOGnocORO
如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。789Please respect copyright.PENANAM4NPopO4Ll
789Please respect copyright.PENANArecNvHNnk2
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc789Please respect copyright.PENANACEMUayHwFQ
789Please respect copyright.PENANAbfYqJnOwGJ
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。789Please respect copyright.PENANAGKHnJYPtSG
789Please respect copyright.PENANAj0z3Q26SXX
Link:789Please respect copyright.PENANAtyiWJfxAYa
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio789Please respect copyright.PENANAxeH2newvRB
789Please respect copyright.PENANA4y72hMasNg
789Please respect copyright.PENANA4Pn9leReXJ
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。789Please respect copyright.PENANA56GBiShneV
789Please respect copyright.PENANA8ulLM03o8J
789Please respect copyright.PENANAidqphaMqPy
Ref1: