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.
After POE, I am stuck with B and C. I shouldn't question correct answer in GMAT, but I do not agree with either B or C.
B says - "There is no way to determine whether a chicken is infected with the Lofgren's disease"
Premise - "Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease" --- so we do have a way to determine whether chickens are affected if they are not sent to market during 1st year of their life.
C says - "A failure to observe Lofgren's disease in commercial chicken populations"
Premise - "Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens" --- we do observe though rarely.
In such question types, we should be able to prove the answer from the given context.
Pl Help and correct my way of thinking.
Correct answer C.
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.
After POE, I am stuck with B and C. I shouldn't question correct answer in GMAT, but I do not agree with either B or C.
B says - "There is no way to determine whether a chicken is infected with the Lofgren's disease"
Premise - "Animals infected with the virus take more than a year to develop symptoms of Lofgren's disease" --- so we do have a way to determine whether chickens are affected if they are not sent to market during 1st year of their life.
C says - "A failure to observe Lofgren's disease in commercial chicken populations"
Premise - "Lofgren's disease has been observed frequently in commercially raised cattle but very rarely in chickens" --- we do observe though rarely.
In such question types, we should be able to prove the answer from the given context.
Pl Help and correct my way of thinking.
Correct answer C.
