在线观看亚洲精品专区-在线观看亚洲免费-在线观看亚洲免费视频-在线观看亚洲欧美-欧美freexxx-欧美free嫩交video

食品伙伴網服務號
 
 
當前位置: 首頁 » 專業英語 » 行業相關 » 正文

蒼蠅在家禽與沙門士菌之間的角色

放大字體  縮小字體 發布日期:2008-07-11
核心提示:The common housefly is unwelcome around food because flies can carry disease-causing germs. Now, scientists have shown that the insects can also spread food poisoning bacteria to chickens in poultry houses. As a result, they say flies are a threat t


The common housefly is unwelcome around food because flies can carry disease-causing germs. Now, scientists have shown that the insects can also spread food poisoning bacteria to chickens in poultry houses. As a result, they say flies are a threat to the safety of poultry products.

Peter Holt and Christopher Geden of the United States Department of Agriculture did a study with Salmonella bacteria. Chickens infected with Salmonella do not get sick, but they can pass the infection to humans through undercooked meat or eggs.

Cases can be mild or severe, or even deadly. The greatest risk is to the old and very young and to people with weak immune systems.

The researchers investigated whether infected hens could pass the infection to flies. They also investigated whether those flies could then infect healthy chickens. The research was described last month in the Agriculture Department magazine Agricultural Research.

Peter Holt put uninfected chickens in individual laying cages next to each other in a room. Then Christopher Geden brought in young flies two days away from becoming flying adults. He placed them in an open box in the room with the chickens.

Three days later, the chickens were given Salmonella in their drinking water and became infected. Soon, about half the house flies had Salmonella in and on their bodies. The scientists used a dissecting microscope to cut the insects apart for study. The number of flies with Salmonella stayed at fifty percent or more for several days.

Next, the researchers placed the newly infected flies near healthy, uninfected hens. The scientists observed that just being near the infected flies did not infect the hens. But many of the hens did get infected when they ate the flies.

The bacteria grew in the intestines of close to forty percent of the birds. The crop, a small part in the digestive system that stores predigested food, was mostly free of Salmonella.

Peter Holt says there is much more to learn about the relationship between Salmonella, flies and poultry. But he says the study shows that growers need to be especially careful to control flies.

The findings show that Salmonella bacteria may not spread around the henhouse by simple physical contact. Instead, eating infected flies seems to be the main way for Salmonella to pass from flies to birds.

And that’s the VOA Special English Agriculture Report, written by Jerilyn Watson. Transcripts and MP3s of our reports are at voaspecialenglish.com. I'm Steve Ember.

 

更多翻譯詳細信息請點擊:http://www.trans1.cn
 
關鍵詞: 蒼蠅 沙門士菌
[ 網刊訂閱 ]  [ 專業英語搜索 ]  [ ]  [ 告訴好友 ]  [ 打印本文 ]  [ 關閉窗口 ] [ 返回頂部 ]
分享:

 

 
推薦圖文
推薦專業英語
點擊排行
 
 
Processed in 0.068 second(s), 14 queries, Memory 0.89 M
主站蜘蛛池模板: 欧美二区三区 | 热久久久| 你懂的欧美 | 美女免费观看一区二区三区 | 2021天天躁狠狠燥 | 免费在线观看大片影视大全 | 人人爱人人澡 | 亚洲国产七七久久桃花 | 五月婷婷六月爱 | 日本一卡精品视频免费 | 最近最新中文字幕6页 | 男女一进一出无遮挡黄 | 欧美三级一区二区 | 人人玩人人添天天爽 | 国产在线精品一区免费香蕉 | 中文日产国产精品久久 | 四虎影视在线影院在线观看 | 精品爱爱| 在线91精品亚洲网站精品成人 | 喷潮白浆直流在线播放 | 国产综合免费视频 | 又黄又湿又爽 | 影音先锋ady69色资源网站 | 久久久久久88色偷偷 | 在线免费色 | 黄h视频| 欧美成人午夜不卡在线视频 | 色播视频在线观看免费 | 黄网站色视频免费看无下截 | 精品国产第一页 | 国产三级在线观看视频 | 2019天天操天天干天天透 | 久久精品网站免费观看 | 天堂网 | 一级a爱片久久毛片 | 久久思re热9一区二区三区 | 毛片网在线 | 性满足久久久久久久久 | 黄视频国产 | 欧美操操操操 | 日本口工禁漫画无遮挡全彩 |