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Lofgren

by jainrahul1985 » Sat Aug 28, 2010 6:12 am
Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens. Both cattle and chickens raised for meat are often fed the type of feed that transmits the virus that causes the disease. Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease, however, and chickens commercially raised for meat, unlike cattle, are generally brought to market during their first year of life.

Which of the following is most strongly supported by the information provided?

A. The virus that causes Lofgren's disease cannot be transmitted to human beings by chickens.
B. There is no way to determine whether a chicken is infected with the Lofgren's disease virus before the chicken shows symptoms of the disease.
C. A failure to observe Lofgren's disease in commercial chicken populations is not good evidence that chickens are immune to the virus that causes this disease.
D. An animal that has been infected with the virus that causes Lofgren's disease but that has not developed symptoms cannot transmit the disease to an uninfected animal of the same species.
E. The feed that chickens and cattle are fed is probably not the only source of the virus that causes Lofgren's disease.

[spoiler]I chose A but that's not the answer . Please suggest[/spoiler]
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by reply2spg » Sat Aug 28, 2010 7:32 am
Answer should be C.
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by FightWithGMAT » Sat Aug 28, 2010 11:10 am
jainrahul1985 wrote:Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens. Both cattle and chickens raised for meat are often fed the type of feed that transmits the virus that causes the disease. Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease, however, and chickens commercially raised for meat, unlike cattle, are generally brought to market during their first year of life.

Which of the following is most strongly supported by the information provided?

A. The virus that causes Lofgren's disease cannot be transmitted to human beings by chickens.
B. There is no way to determine whether a chicken is infected with the Lofgren's disease virus before the chicken shows symptoms of the disease.
C. A failure to observe Lofgren's disease in commercial chicken populations is not good evidence that chickens are immune to the virus that causes this disease.
D. An animal that has been infected with the virus that causes Lofgren's disease but that has not developed symptoms cannot transmit the disease to an uninfected animal of the same species.
E. The feed that chickens and cattle are fed is probably not the only source of the virus that causes Lofgren's disease.

[spoiler]I chose A but that's not the answer . Please suggest[/spoiler]
Yes C it is.

Combination of 2 premises.
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by jainrahul1985 » Sat Aug 28, 2010 11:43 am
yes the OA is C .Can anyone explain why its C not A
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by Whitney Garner » Mon Oct 18, 2010 9:01 am
Received a PM asking me to respond. Don't see a source. Please cite the source (author) of the problem so I can respond!
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by rjdunn03 » Mon Oct 18, 2010 5:33 pm
jainrahul1985 wrote:Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens. Both cattle and chickens raised for meat are often fed the type of feed that transmits the virus that causes the disease. Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease, however, and chickens commercially raised for meat, unlike cattle, are generally brought to market during their first year of life.

Which of the following is most strongly supported by the information provided?

A. The virus that causes Lofgren's disease cannot be transmitted to human beings by chickens.
B. There is no way to determine whether a chicken is infected with the Lofgren's disease virus before the chicken shows symptoms of the disease.
C. A failure to observe Lofgren's disease in commercial chicken populations is not good evidence that chickens are immune to the virus that causes this disease.
D. An animal that has been infected with the virus that causes Lofgren's disease but that has not developed symptoms cannot transmit the disease to an uninfected animal of the same species.
E. The feed that chickens and cattle are fed is probably not the only source of the virus that causes Lofgren's disease.

[spoiler]I chose A but that's not the answer . Please suggest[/spoiler]
It isn't A because whether or not it is transmittable to humans it beyond scope of the passage. For all we know it could be passed on from chickens to humans, if it were seen in chickens.

I chose C because the passage states that it takes more than a year for an animal to develop symptoms of Lofgren's, but that the chickens used for meat are brought to market within the first year of life. Thus, if they were brought to market after say two or three years, it is possible that Lofgren's WOULD be seen in chickens.

Hope that makes sense.
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by bubbliiiiiiii » Mon Oct 18, 2010 10:29 pm
jainrahul1985 wrote:Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens. Both cattle and chickens raised for meat are often fed the type of feed that transmits the virus that causes the disease. Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease, however, and chickens commercially raised for meat, unlike cattle, are generally brought to market during their first year of life.

Which of the following is most strongly supported by the information provided?

A. The virus that causes Lofgren's disease cannot be transmitted to human beings by chickens.
Out of context since the passage doesnot say anything about human infection!
B. There is no way to determine whether a chicken is infected with the Lofgren's disease virus before the chicken shows symptoms of the disease.
Contender. I perceive from the passage that, disease is found in cattles but not in Chicken since they are brought to market during their first year. Thus, the chickens are not identified with disease. Hence, there may not be an alternative way to identify the disease.
C. A failure to observe Lofgren's disease in commercial chicken populations is not good evidence that chickens are immune to the virus that causes this disease.
This option seems to be a lucrative one but since it is stated in passage that few chickens are found with disease so there is no question of immunity. Thus, could not be an option.
D. An animal that has been infected with the virus that causes Lofgren's disease but that has not developed symptoms cannot transmit the disease to an uninfected animal of the same species.
Out of context.
E. The feed that chickens and cattle are fed is probably not the only source of the virus that causes Lofgren's disease.
The word only restricts the scope of this option. Thus, ruled out.

I would go with B.

OA and expert's opinion please. :)

[spoiler]I chose A but that's not the answer . Please suggest[/spoiler]
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