Keeping a pet cat puts owners at greater risk of going blind, but a dog appears to protect eyesight, a new study suggests.
一項(xiàng)最新研究表明，養(yǎng)貓會(huì)增加主人失明的風(fēng)險(xiǎn)，但是養(yǎng)狗卻能保護(hù)主人的視力。

Scientists have discovered that dogs and cats carry antigens which can prompt different immune responses in humans.
科學(xué)家們發(fā)現(xiàn)狗和貓身上都攜帶能激起人體的不同免疫反應(yīng)的抗原。

While the allergen which dogs carry reduces the chance of developing glaucoma – the second leading cause of blindness in theUK– owning a cat nearly doubles the risk of contracting the eye disease.
狗身上攜帶的過(guò)敏原會(huì)降低主人患青光眼的幾率，在英國(guó)，青光眼是導(dǎo)致人們失明的第二大誘因，而養(yǎng)貓讓主人感染這一眼疾的風(fēng)險(xiǎn)增加了一倍。

Many pet owners suffer mild allergic reactions to their pets but still choose to keep them. However the new study suggests that even a small immune response could lead to blindness.
許多寵物主人對(duì)他們的寵物都有輕微的過(guò)敏反應(yīng)，但是卻堅(jiān)持養(yǎng)寵物。然而最新研究表明，即使是個(gè)很小的免疫反應(yīng)都有導(dǎo)致失明的危險(xiǎn)。

The study by the University of California, Los Angeles, found that cat owners who reacted to their pet allergen had a 90 per cent increased risk of glaucoma compared with non-pet owners. But dog owners were 20 per cent less likely to develop the debilitation condition.
加州大學(xué)洛杉磯分校的這項(xiàng)研究發(fā)現(xiàn)，如果寵物貓的主人對(duì)他們的寵物過(guò)敏的話，其患青光眼的風(fēng)險(xiǎn)比沒(méi)養(yǎng)寵物的人高90%。但是，寵物狗的主人出現(xiàn)視力減弱的幾率卻很可能比一般人低20%。

Keeping a dog also has the added benefit that owners are outside more which has been proven to protect against short-sightedness.
養(yǎng)狗的主人需要經(jīng)常在戶(hù)外活動(dòng)，這同時(shí)也有助于保護(hù)主人的視力，不會(huì)近視。

“Not only is Fido man's best friend, he may also save your sight,” said British laser eye surgeon Dr David Allamby.
英國(guó)激光眼科醫(yī)生大衛(wèi)·阿蘭比博士說(shuō)：“寵物狗不僅是人類(lèi)最好的朋友，還可以保護(hù)你的視力。”

“Cats could cause our immune system to react in a way that predispose eyes to the development of glaucoma.
“而寵物貓卻會(huì)誘發(fā)我們的免疫系統(tǒng)做出不同的反應(yīng)，導(dǎo)致青光眼的出現(xiàn)。”

“Exposure to dogs appears to be linked to the opposite effect and could be protective against the disease.”
“與狗接觸卻會(huì)產(chǎn)生相反的作用，并且還能防青光眼。”

Glaucoma occurs when fluid in the eyeball stops draining efficiently, causing a build-up of pressure which damages the optic nerve and nerve fibres from the retina. Previous studies have suggested that inflammation can drive the disease and the researchers wanted to find out if that could be triggered by pet allergens.
青光眼是由于眼球中的液體不能有效排出，導(dǎo)致眼內(nèi)壓力累積，從而導(dǎo)致視網(wǎng)膜的視神經(jīng)和神經(jīng)纖維受損導(dǎo)致的。早前的研究表明炎癥能引起青光眼，研究人員同時(shí)還想弄清楚，寵物過(guò)敏原是否也會(huì)導(dǎo)致青光眼。

Animals frequently groom themselves so allergens from saliva and secretions spread throughout the home, becoming airborne easily where they can be inhaled by humans.
由于動(dòng)物們頻繁地梳理它們自己，所以來(lái)自唾液和分泌物的過(guò)敏原很快就擴(kuò)散到整個(gè)家里，接著又通過(guò)空氣傳播很容易就被人類(lèi)吸入體內(nèi)。

The researchers believe that dogs are healthier for humans because they spend more time outdoors.
研究人員認(rèn)為，對(duì)人類(lèi)來(lái)說(shuō)，狗更健康一些，因?yàn)樗鼈兇蠖鄶?shù)時(shí)間都在戶(hù)外。

“The protective effect of dogs could be due to their natural antigens in their dead skin, but might also be because they spend more time outdoors and are happy to get dirty, whereas cats are cleaner animals,” said Dr Anne Coleman, of UCLA.
加州大學(xué)洛杉磯分校的安妮·科爾曼博士表示：“狗的防護(hù)作用可能是來(lái)自于它們死皮內(nèi)的自然抗原，但是也可能是由于它們更多時(shí)間都在戶(hù)外，而且把自己弄臟了也很開(kāi)心，然而，貓卻是種愛(ài)干凈的動(dòng)物。”

“We already know that exposure to dogs and the germs and bacteria they carry can be good for the immune system. Now it seems to be the case for the eyes too.
“我們已經(jīng)知道接觸狗和它們攜帶的細(xì)菌對(duì)人類(lèi)免疫系統(tǒng)有益。現(xiàn)在發(fā)現(xiàn)這似乎對(duì)人類(lèi)的眼睛也有益處。

“Allergens from cats may have biochemical or physical properties that trigger antibodies targeting the optic nerve, while dog allergens may behave differently, possibly because dogs spend more time outdoors."
“貓身上攜帶的過(guò)敏原可能有生物化學(xué)性或物理性特征，能誘發(fā)針對(duì)視神經(jīng)的抗體，而狗身上攜帶的過(guò)敏原起到的作用卻不同，可能是因?yàn)楣反蠖鄶?shù)時(shí)間都在戶(hù)外。”

Vocabulary:

antigen: 抗原

glaucoma: 青光眼

debilitation: 衰弱變化

predispose: 使傾向于

retina: 視網(wǎng)膜

inflammation: 炎癥

saliva: 唾液

secretion：分泌物

（翻譯：燕子雙飛 編輯：Helen）