- •1. Study the text and say which statements given below are true and which are false. Correct the false ones using the text:
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- •1. Study the text and say which statements given below are true and which are false. Correct the false ones using the text:
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1. Study the text and say which statements given below are true and which are false. Correct the false ones using the sentences from the text:
1) The Goverment should provide better care for those who suffer from schizophrenia.
2) The patients with mental illnesses are released into the community without proper facilities for their care.
2. Review the text and answer the following questions:
1) What is schizophrenia? What is it characterized by?
DNA USED TO FIGHT SKIN CANCER
New York. The injection of new genes directly into a patient's tumor tissue is a safe procedure that can help impel the immune system to destroy the malignancy, scientists have reported.
The results from the first phase of a clinical trial suggest that the use of DNA as a drug, a radical new approach to battling cancer and other disorders, may eventually supplement if not supplant standard tumor treatments like radiation or chemotherapy.
Dr Gary J. Nabel of the Medical Institute at the University of Michigan and his colleagues reported their findings in the Proceedings of the National Academy of Sciences. They found that when they injected DNA into the tumors of five patients with advanced skin cancers the genes slipped deep inside the malignant cells and switched on, as the scientists hoped.
All five patients tolerated the novel therapy well. In one patient, a 68-year-old man for whom conventional and experimental therapies had failed, the treatment caused many disseminated tumors to shrink and in some cases disappear.
But the researchers stressed that much more investigation remains to be done before the method can be introduced on a wide scale for the treatment of melanoma and other tumors.
1. Study the text and say which statements given below are true and which are false. Correct the false ones using the text:
1) The injections of genes are suggested to be made directly into a patient's tumor and the procedure is not at all safe.
2) The new procedure is supposed to help impel the immune system to destroy the malignancy.
3) Radiation and chemotherapy are standard tumor treatments.
2. Review the text and answer the following questions:
1) What is used as standard tumor treatments?
NEW FEVERS
After the disappearance of smallpox, eradicated thanks to the intensive worldwide strategy of the World Health Organization, other viral diseases which were long unknown have come to be a serious health problem. All occurring in tropical countries, they are the Marbur virus disease first described in 1967, Lassa fever discovered in Nigeria in 1969, and Ebola fever named after a small river in northern Zaire where an epidemic broke out almost concurrently with one in southern Sudan in 1976 and took a heavy toll of life.
High mortality
Common to these three kinds of hemorrhagic fever originating in Africa is the person-to-person infection and also an exceedingly high mortality. Ebola fever claimed the lives of 52 percent of the people contracting the disease in Sudan and over 90 percent in Zaire. Up to 50 percent of the patients fell victim to Lassa fever and the Marbur virus disease was lethal in 25 percent of the cases recorded.
There is no specific therapy nor any vaccination for these diseases. Trials have been undertaken with plasma obtained from convalescents, but its effectiveness has not yet been established. Attempts to treat the diseases with interferon have not yielded final evidence hitherto. Therapy in hemorrhagic fever of the kinds mentioned is therefore only symptomatic. In doing so, attention is concentrated on the gastrointestinal and hemorrhagic symptoms although the pathogenesis of the hemorrhages is not finally clarified. This makes it difficult to administer supportive treatment.
A virus — a very small microorganism parasitic within living cells; differs from bacteria in having only one kind of nucleic acid, either DNA or RNA, in lacking the apparatus necessary for energy production and protein synthesis, and in not reproducing by binary fission but by independent synthesis of their component parts which are then assembled; causes many kinds of acute and chronic diseases in man.