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?728Please respect copyright.PENANAmK7OelOEtn728Please respect copyright.PENANA8jduypnzCj
728Please respect copyright.PENANAP5jglzNbCY
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。728Please respect copyright.PENANAojtj5w43Qn
728Please respect copyright.PENANAJcm4mPAEpv
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。728Please respect copyright.PENANAb3KuT6CUJV
(這不是食神劇情,而是確實新聞,Ref1)728Please respect copyright.PENANAHJMZkin4RW
728Please respect copyright.PENANA62W1XuUS86
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。728Please respect copyright.PENANAItfGDw8vLC
728Please respect copyright.PENANAyBOdAxgwrz
728Please respect copyright.PENANA0FO8okZpsU
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)728Please respect copyright.PENANAawQPsLh7qe728Please respect copyright.PENANAHnmdNACk6u
728Please respect copyright.PENANAqXnKoI9Sxc
Capsule728Please respect copyright.PENANAY6g8uxnE99
防止細菌脫水728Please respect copyright.PENANAx6DQNbC5gd
保護自己免被人類的吞噬細胞吞噬728Please respect copyright.PENANA4CGBIek7wP
728Please respect copyright.PENANAklwDao91A6
Pili728Please respect copyright.PENANAma3WMR8D0C
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728Please respect copyright.PENANADbb0IkgvSu
728Please respect copyright.PENANAwV6cgfTOE8
Flagellum728Please respect copyright.PENANAiu2YJSFceI
會以螺旋槳的方式轉動,讓細菌可以隨意走動728Please respect copyright.PENANA7KB1MXjhQE
728Please respect copyright.PENANAoUNs96kxSS
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728Please respect copyright.PENANAo3vrukOBJv
https://www.penana.com/article/465358728Please respect copyright.PENANAgiQAaxRb8i
728Please respect copyright.PENANAmhjFnVQWhm
728Please respect copyright.PENANAp7UPL7kXdd
(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)。728Please respect copyright.PENANAuFLAMDQclz
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。728Please respect copyright.PENANA0sOxWmDWEW
728Please respect copyright.PENANA58beTggCms728Please respect copyright.PENANA8eOHAn1aXu
728Please respect copyright.PENANA3RnM2UdALP
728Please respect copyright.PENANA3Ufdpof1IM
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。728Please respect copyright.PENANAv01wN3bS2c
728Please respect copyright.PENANANTqbTluzmc
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。728Please respect copyright.PENANA7f3g4JQLXg
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。728Please respect copyright.PENANA352AlMR2W2
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。728Please respect copyright.PENANALnvosAiqmO
728Please respect copyright.PENANAdhh0BhMPyY
而最「令人意想不到」的是,此病絕對不可以用抗生素來醫治。728Please respect copyright.PENANAfYQavH9GQ7
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。728Please respect copyright.PENANAW4S8mdDuZS
728Please respect copyright.PENANANzexl0AzFW
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。728Please respect copyright.PENANARNIrRyRpkl
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。728Please respect copyright.PENANAHjxla4czr3
728Please respect copyright.PENANA7NiYriAbKg
照這個情況來看,或者,侵侵吃Well Done牛排是有他的道理......728Please respect copyright.PENANAGheMl74o9Z
728Please respect copyright.PENANAXqchiSRJik
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。728Please respect copyright.PENANAXLzqHANze0
728Please respect copyright.PENANAMaeVwglNcJ
至少我都暫時未試過因為食生牛扒而肚瀉。728Please respect copyright.PENANAB1Bes7fs9V
728Please respect copyright.PENANAlgXmsCOXmw
(在摸著木塊下的情況寫下這句。)728Please respect copyright.PENANAjJw2Q64h61
728Please respect copyright.PENANA3OJORNGG7P
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。728Please respect copyright.PENANA5DfzAGACMo
728Please respect copyright.PENANAWwX9VuyPFm
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/toc728Please respect copyright.PENANAcsosJpTzvX
728Please respect copyright.PENANAsjL743wVGd
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。728Please respect copyright.PENANA355pHFREXE
728Please respect copyright.PENANAUX9iZVT2WS
Link:728Please respect copyright.PENANAeu93WtJTUe
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio728Please respect copyright.PENANAfZwJTF4Uel
728Please respect copyright.PENANA2V8pCOEZCB
728Please respect copyright.PENANA7REPJpHsNS
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。728Please respect copyright.PENANA4WzGb4Y6J8
728Please respect copyright.PENANAgnP1svf6GS
728Please respect copyright.PENANAcl2O24YgD8
Ref1: