Women who own cats are more likely to have mental health problems and kill themselves because they can be infected by a common parasite that can be caught from cat litter, a study has found.
Researchers found women infected with the Toxoplasma gondii (T. gondii) parasite(剛地弓形蟲), which is spread through contact with cat waste or eating undercooked meat or unwashed vegetables, are at increased risk of attempting suicide.
The study involved more than 45,000 women in Denmark. About a third of the world’s population is infected with the parasite, which hides in cells in the brain and muscles, often without producing symptoms.
The infection, which is called toxoplasmosis(弓形蟲病), has been linked to mental illness, such as schizophrenia(精神分裂癥), and changes in behavior.
The study’s senior author Doctor Teodor Postolache, an associate professor of psychiatry(精神病學(xué)) at the University of Maryland School of Medicine in the United States, said, “We can’t say with certainty that T. gondii caused the women to try to kill themselves, but we did find a predictive association between the infection and suicide attempts later in life that deserves additional studies.”
Doctor Albert Reece, vice president of medical affairs at the University of Maryland, said, “T. gondii infection is a major public health problem around the world, and many people don’t realize they’re infected.
“Dr Postolache is a leading expert on suicide neuroimmunology(神經(jīng)免疫學(xué)). Suicide is a critically important mental health issue. About one million people commit suicide and another 10 million attempt suicide worldwide each year. We hope that this type of research will one day help us find ways to save many lives that now end too early in suicide.”
Dr. Postolache’s research team at the University of Maryland was the first to report a connection between T. gondii and suicidal behavior in 2009. He is cooperating with researchers in Denmark, Germany and Sweden to confirm and investigate the way leading to this association.
The T. gondii parasite thrives in the intestines of cats, and it is spread through their waste. All warm-blooded animals can become infected through contact with it. Humans can become infected by changing their infected cats’ litter boxes, eating unwashed vegetables, drinking water from a polluted source, or by eating undercooked or raw meat.
Not washing kitchen knives after preparing raw meat before handling another food item also can lead to infection. Pregnant women can pass the parasite directly to their unborn babies and are advised not to change cat litter boxes to avoid possible infection.
Babies don’t produce antibodies to T. gondii for three months after they are born, so the antibodies present in their blood represented infection in the mothers. The scientists studied Danish health patients to determine if any of these women later attempted suicide, including cases of violent suicide attempts which may have involved guns, sharp instruments and jumping from high places.
The study found that women infected with T. gondii were one and a half times more likely to attempt suicide compared to those who were not infected, and the risk seemed to rise with increasing levels of the T. gondii antibodies.
Dr Postolache noted limitations to the study, such as the inability to determine the cause of the suicidal behavior.
The findings were published online in the Archives of General Psychiatry.
1.The objects of the research are women from _____.
A. Demark B. the USA C. Germany D. Sweden
2.The common way which is more likely to be infected with the disease is _____.
A. to eat unwashed vegetables or undercooked meat
B. to clean a place where a cat once lived for a time
C. to pass the infection to her unborn baby during a woman’s pregnancy
D. to reuse kitchen tools which have been used to cut raw meat
3.What is the consequence if a woman is infected with the parasite in the passage?
A. Having a high fever. B. Doing deliberate self-harm.
C. Keeping a depressed mood. D. Becoming bad tempered.
53.
4. What can be inferred from the passage?
A. Women have a higher risk to be infected by the parasite than men.
B. The result of the research may help the scientists to find ways to stop suicide in advance.
C. The scientists will continue their research into the possible connection.
D. The risk of being infected seems to rise with the decreasing levels of the antibodies.
5.Which of the following statements would probably be the best title of the passage?
A. Why are women more likely to commit suicide?
B. Women should keep away from cats.
C. Ways found to deal with women’s mental problems.
D. Are women who own cats at a suicide risk?
1.A
2.B
3.B
4.C
5.D
【解析】
試題分析:本文講述的是與貓長(zhǎng)時(shí)間接觸的人容易有精神方面的問題。文章介紹了對(duì)此現(xiàn)象進(jìn)行了研究的具體情況。
1.A 細(xì)節(jié)題。根據(jù)文章第三段第一句The study involved more than 45,000 women in Denmark.可知本次研究的對(duì)象都是丹麥的女性。故A正確。
2.B 推理題。根據(jù)文章第二段1,2行Researchers found women infected with the Toxoplasma gondii (T. gondii) parasite(剛地弓形蟲), which is spread through contact with cat waste可知既然這種病是由于貓的糞便攜帶的病菌傳播的。那么較好的方法就是徹底打掃有貓長(zhǎng)時(shí)間住的地方,殺死這些病菌。故B正確。
3.B 細(xì)節(jié)題。根據(jù)文章第五段we did find a predictive association between the infection and suicide attempts later in life that deserves additional studies.”可知這種病菌與人們的自殺企圖是有關(guān)系的,自殺是一種自殘的自我傷害的行為。故B正確。
4.C 推理題。根據(jù)文章第五段“We can’t say with certainty that T. gondii caused the women to try to kill themselves, but we did find a predictive association between the infection and suicide attempts later in life that deserves additional studies.”可知我們現(xiàn)在無法確定這種病菌與女性自殺之間的聯(lián)系,但是科學(xué)家會(huì)繼續(xù)努力發(fā)現(xiàn)這兩者之間的聯(lián)系。故C正確。
5.D 主旨大意題。根據(jù)文章主題段第一段Women who own cats are more likely to have mental health problems and kill themselves because they can be infected by a common parasite that can be caught from cat litter, a study has found.可知本文講述的是與貓長(zhǎng)時(shí)間接觸的人容易有精神方面的問題。文章對(duì)此現(xiàn)象進(jìn)行了研究。故D正確。
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