![]() ![]() How do we select the most appropriate right answer between two right answers? It is not easy to assume that the infected fish will infect others as there is not information on whether the disease is contagious. Both B & E satisfies the question which has been raised in the stem. In this scenario, once any fish is identified as infected, we will know that it already has been infecting the domestic stock. The problem is: during the first few weeks, that infected fish would be spreading the infection in the domestic stock. After that point, of course, it could infect no other fish. It is introduced into the domestic stock, and then four weeks later, when the antibody test would be effective, it would be pulled from the stock, found to be infected, and then not introduced to the stock. Let's say a particular fish is infected by the virus a few hours before it is caught. Educating anyone about the disease is not going to stop the spread of the disease if they keep introducing at-risk fish into domestic stocks. Furthermore, if infected fish are introduced into domestic stocks, other fish would be infected, irrespective of when they had been originally caught. (C) is irrelevant: tagging the fish would not solve anything. Sure, scientists could try this, but there's no guarantee of success, especially in the short term. ![]() Yes, it would be great if we could cure the virus, but finding remedies for viruses is not Western Medicine's strong suit - there are numerous viruses (polio, chickenpox, measles, hepatitis, etc.) for which we have no cure, only vaccines, and for some, from the common cold to Ebola and AIDS, we don't even have a vaccine, despite extensive research. At that point, over four weeks from their capture, the antibody test would be effective, and we would know that if an individual fish tested negative for antibodies, that fish would be uninfected and could be introduced to domestic stocks without risk. Once here, we would quarantine them for another three weeks. It takes a little more than a week to ship a caught fish to the US. Even if we tested each and every fish, some of them might still be infected and thus able to infect other fish, and their infection doesn't show up in the test because the instance of infection immediately preceded their capture. We can test for antibodies, but the problem is: it takes four weeks from the time of initial infection for enough antibodies to show up in the blood - before that, the antibody test just doesn't work. We want to prevent infected fish from getting into the domestic stocks of these fish and spreading the illness. ![]() We import this fish, the Bluetail Moonbeam, and there's the threat of an infectious virus. Which of the following, if performed by the government, could logically be expected to overcome the problem with the plan to limit the spread of this virus in the Bluetail Moonbeam?Ī) Funding research into either an inoculation or a cure for this viral infection.ī) Quarantining each imported Bluetail Moonbeam for at least three weeks, then performing the antibody test on each, and allowing only the uninfected to move into industrial stocks.Ĭ) Requiring each Bluetail Moonbeam sold to be tagged with a tag indicating their date of capture.ĭ) Launching an educational campaign to make those industries that breed the Bluetail Moonbeam aware of the limitations of the antibody test for the virus.Į) Tracking the imported Bluetail Moonbeam into industry held stock, and for each imported fish, four weeks after capture, removing it from stock to be tested only uninfected fish would be returned to stock. Thus, even running the antibody test on each Bluetail Moonbeam entering the country would still allow infected fish into the American stocks. Once the Bluetail Moonbeam is in captivity, shippers can eliminate all new sources of infection, but unfortunately, some Bluetail Moonbeams might be infected days or even hours before being caught. Catching a live Bluetail Moonbeam and shipping it to the United States takes a little more than a week. Yet, after the instance of infection, antibodies take about four weeks to appear in the fish's blood, and the test will find no results before then. Even before a Bluetail Moonbeam develops any symptoms, biologists can establish the presence of the infection by an inexpensive test for antibodies in the fish's blood. An infectious virus has been threatening Bluetail Moonbeam stocks in the United States. The Bluetail Moonbeam, endemic to the streams and rivers of Asia, is regularly imported into the United States by companies wishing to breed it for food.
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