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OG - RC Passage

This topic has 1 expert reply and 1 member reply
fiza gupta Master | Next Rank: 500 Posts
Joined
31 Jul 2016
Posted:
216 messages
Followed by:
6 members
Thanked:
31 times
Target GMAT Score:
750+

OG - RC Passage

Post Thu Oct 20, 2016 8:42 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Although genetic mutations in bacteria and viruses
    can lead to epidemics, some epidemics are caused
    by bacteria and viruses that have undergone no
    significant genetic change. In analyzing the latter,
    (5) scientists have discovered the importance of social
    and ecological factors to epidemics. Poliomyelitis,
    for example, emerged as an epidemic in the United
    States in the twentieth century; by then , modern
    sanitation was able to delay exposure to polio until
    (10) adolescenceor adulthood, at which time polio
    infection produced paralysis. Previously, infection
    had occurred during infancy, when it typically
    provided lifelong immunity without paralysis. Thus,
    the hygiene that helped prevent typhoid epidemics
    (15) indirectly fostered a paralytic polio epidemic.
    Another example is Lyme disease, which is caused
    by bacteria that are transmitted by deer ticks. It
    occurred only sporadically during the late
    nineteenth century but has recently become
    (20) prevalent in parts of the United States, largely due
    to an increase in the deerpopulation that occurred
    simultaneously with the growth of the suburbs and
    increased outdoor recreationa l activities in the
    deer's habitat. Similarly, an outbreak of dengue
    (25) hemorrhagic fever became an epidemic inAsia in
    the 1950s because of ecological changes that
    caused Aedes aegypti, the mosquito that transmits
    the dengue virus, to proliferate. The stage is now
    set in the United States for a dengue epidemic
    (30) because of the inadvertent introduction and wide
    dissemination of another mosquito, Aedes albopictus.


    The passage suggests that a lack of modern sanitation would make which of the following most
    likely to occur?
    (A) An outbreak of Lyme disease
    (8) An outbreak of dengue hemorrhagic fever
    (C) An epidemic of typhoid
    (D) An epidemic of paralytic polio among infants
    (E) An epidemic of paralytic polio among adolescents and adults

    _________________
    Fiza Gupta

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    fiza gupta Master | Next Rank: 500 Posts
    Joined
    31 Jul 2016
    Posted:
    216 messages
    Followed by:
    6 members
    Thanked:
    31 times
    Target GMAT Score:
    750+
    Post Thu Oct 20, 2016 8:43 pm
    OA:C

    _________________
    Fiza Gupta

    Post Fri Nov 18, 2016 12:50 pm
    fiza gupta wrote:
    Although genetic mutations in bacteria and viruses
    can lead to epidemics, some epidemics are caused
    by bacteria and viruses that have undergone no
    significant genetic change. In analyzing the latter,
    (5) scientists have discovered the importance of social
    and ecological factors to epidemics. Poliomyelitis,
    for example, emerged as an epidemic in the United
    States in the twentieth century; by then , modern
    sanitation was able to delay exposure to polio until
    (10) adolescenceor adulthood, at which time polio
    infection produced paralysis. Previously, infection
    had occurred during infancy, when it typically
    provided lifelong immunity without paralysis. Thus,
    the hygiene that helped prevent typhoid epidemics
    (15) indirectly fostered a paralytic polio epidemic.
    Another example is Lyme disease, which is caused
    by bacteria that are transmitted by deer ticks. It
    occurred only sporadically during the late
    nineteenth century but has recently become
    (20) prevalent in parts of the United States, largely due
    to an increase in the deerpopulation that occurred
    simultaneously with the growth of the suburbs and
    increased outdoor recreationa l activities in the
    deer's habitat. Similarly, an outbreak of dengue
    (25) hemorrhagic fever became an epidemic inAsia in
    the 1950s because of ecological changes that
    caused Aedes aegypti, the mosquito that transmits
    the dengue virus, to proliferate. The stage is now
    set in the United States for a dengue epidemic
    (30) because of the inadvertent introduction and wide
    dissemination of another mosquito, Aedes albopictus.


    The passage suggests that a lack of modern sanitation would make which of the following most
    likely to occur?
    (A) An outbreak of Lyme disease
    (8) An outbreak of dengue hemorrhagic fever
    (C) An epidemic of typhoid
    (D) An epidemic of paralytic polio among infants
    (E) An epidemic of paralytic polio among adolescents and adults
    In line 14, we get the following: Thus, the hygiene that helped prevent typhoid epidemics...

    Well, if hygiene prevented typhoid epidemics, stands to reason that lack of hygiene/sanitation would contribute to typhoid epidemics. Answer is C

    _________________
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