美國研究：養(yǎng)殖場大腸桿菌可經(jīng)空氣污染周邊作物
發(fā)布時間：
2022-11-16
作者：
據(jù)外媒報道，《應(yīng)用與環(huán)境微生物學(xué)》雜志刊登一項美國研究顯示，養(yǎng)殖場中的大腸桿菌可借助空氣傳播，并污染周邊農(nóng)作物。
該研究由美國農(nóng)業(yè)部肉用動物研究中心Elaine D. Berry及其同事花費兩年時間完成。
研究顯示，養(yǎng)牛場周邊的蔬菜會受到養(yǎng)牛場大腸桿菌的污染，且距離越遠(yuǎn)污染程度越低。
研究發(fā)現(xiàn)，距離養(yǎng)牛場60米的地方平均會有3.5%的綠葉蔬菜被大腸桿菌污染，在距離180米的地方也有1.8%的蔬菜被大腸桿菌污染。
研究還發(fā)現(xiàn)，污染程度最高的時間為8月和9月份，當(dāng)時降水稀少并且溫度較高，這種條件下大腸桿菌更容易傳播。
According to foreign media reports, a us study published in the journal of applied and environmental microbiology shows that e. coli in farms can spread by air and contaminate surrounding crops.
The study was conducted over two years by Elaine d. Berry and her colleagues at the U.S. department of agriculture's meat animal research center.
Research has shown that vegetables around cattle farms are contaminated with e. coli from cattle farms, and the farther away they are, the less contaminated they are.
The study found that an average of 3.5 per cent of green leafy vegetables 60 metres from cattle farms were contaminated with e. coli, and 1.8 per cent of vegetables 180 metres away were contaminated with e. coli.
The study also found that the highest levels of contamination occurred in August and September, when rainfall was low and temperatures were high, making e. coli more likely to spread.