生菜生吃是甜的還是苦的？生菜生吃會(huì)有寄生蟲嗎
2022-12-04
新興的豬繁殖與呼吸綜合征菌株可能攜帶高致命性
更新時(shí)間：2022-03-15 06:52:10作者：佚名
ANALYSIS - Emerging strains of Porcine Reproductive and Respiratory Syndrome (PRRS) can develop on a regularly basis and every few years a particularly virulent strain will arise and cause waves of disease, reports Sarah Mikesell from the North American PRRS Symposium."We do not know exactly how these happen, but the genetic changes have to involve mutation and recombination, and the consequences are bad," said Michael Murtaugh, professor and scientist at the University of Minnesota.
北美豬繁殖與呼吸綜合征((PRRS))研討會(huì)莎拉克賽爾(Sarah Mikesell)報(bào)告，新興的豬繁殖與呼吸綜合征菌株按照基礎(chǔ)的定期規(guī)律發(fā)展，每幾年會(huì)浮現(xiàn)一個(gè)尤其的病毒菌株，并引起一波波的疾病。明尼蘇達(dá)大學(xué)科學(xué)家邁克爾莫塔夫(Michael Murtaugh)教授說“我們不能盡全知道這是如何發(fā)生的，但是基因改變包括突變和重組，這樣產(chǎn)生的結(jié)果是不利的”。