1. Fill in the blank. The study of the factors affecting the prevalence and spread of disease within a community is _______________. (1 point) 2. Choose the correct answer. The primary habitat in the natural world from which a pathogen originates is its: (1 point) - Apparent carrier - Vector - Reservoir - Zoonosis 3. Choose the correct answer. The individual or object from which an infection is actually acquired is the __________. (1 point) - Vector - Portal - Source - Harbor 4. Matching. Live animals which transmit infectious agents from one host to another are referred to as vectors. Match the types of vectors with their description below. Note: There are extra answer choices you will not use. (2 points) A. Mechanical _____ Not necessary to the life cycle of an infectious agent B. Physical and simply transports the agent without being infected C. Biological _____ Actively participates in the pathogens life cycle, D. Natural allowing it to multiply or even complete its life cycle 5. Choose all the correct answers. Examples of biological vectors include which of the following: (2 points) -injection of saliva into blood by a mosquito -transmission of fecal pathogens by cockroaches -carrying of pathogens on the feet of houseflies -regurgitation of blood into wounds by the tsetse fly Part 2: Read the following scenario and Section 23.4 from your text, then answer the following questions. A 51-year-old man named Robert Bragg reported to a hospital in the United Kingdom complaining of general malaise (discomfort), myalgia (muscle pain), fevers, headache, vomiting, and diarrhea. He complained that during the day he felt weak and tired; he was unsure if this was because his symptoms kept him awake at night, or if something else was causing his fatigue. Robert had recently returned from a two-week safari in central Africa. He said that he felt fine during the entire trip, but reported that he had received numerous bug bites while on safari. He also said that while he was in Africa he routinely ate unfamiliar foods, including meats, which may have been prepared and stored under conditions that would not be considered sanitary practices in the United Kingdom. Doctors suspected Roberts symptoms were caused by an infection he developed while on safari. Because Robert had spent much of his time outdoors in an area of the world where the Anopheles mosquitoes that transmit malaria are common, the doctors immediately suspected he had contracted malaria, because his symptoms matched those generally expected of people with malaria. 6. Choose the correct answer. Which of the following could be collected from the patient to confirm the diagnosis? (1 point) - Blood - Urine - Sputum - Pus exudate 7. Choose the correct answer. What is the genus name of the microorganism that causes malaria? (1 point) - Paramecium -Anopheles - Plasmodium -Pseudomonas 8. True or false. The life cycle of the malarial parasite consists of two phasesthe asexual phase, which is carried o.

1. 1. Fill in the blank. The study of the factors affecting the prevalence and spread of disease within
a community is _______________. (1 point) 2. Choose the correct answer. The primary habitat
in the natural world from which a pathogen originates is its: (1 point) - Apparent carrier - Vector
- Reservoir - Zoonosis 3. Choose the correct answer. The individual or object from which an
infection is actually acquired is the __________. (1 point) - Vector - Portal - Source - Harbor 4.
Matching. Live animals which transmit infectious agents from one host to another are referred to
as vectors. Match the types of vectors with their description below. Note: There are extra answer
choices you will not use. (2 points) A. Mechanical _____ Not necessary to the life cycle of an
infectious agent B. Physical and simply transports the agent without being infected C. Biological
_____ Actively participates in the pathogens life cycle, D. Natural allowing it to multiply or even
complete its life cycle 5. Choose all the correct answers. Examples of biological vectors include
which of the following: (2 points) -injection of saliva into blood by a mosquito -transmission of
fecal pathogens by cockroaches -carrying of pathogens on the feet of houseflies -regurgitation of
blood into wounds by the tsetse fly Part 2: Read the following scenario and Section 23.4 from
your text, then answer the following questions. A 51-year-old man named Robert Bragg reported
to a hospital in the United Kingdom complaining of general malaise (discomfort), myalgia
(muscle pain), fevers, headache, vomiting, and diarrhea. He complained that during the day he
felt weak and tired; he was unsure if this was because his symptoms kept him awake at night, or
if something else was causing his fatigue. Robert had recently returned from a two-week safari in
central Africa. He said that he felt fine during the entire trip, but reported that he had received
numerous bug bites while on safari. He also said that while he was in Africa he routinely ate
unfamiliar foods, including meats, which may have been prepared and stored under conditions
that would not be considered sanitary practices in the United Kingdom. Doctors suspected
Roberts symptoms were caused by an infection he developed while on safari. Because Robert
had spent much of his time outdoors in an area of the world where the Anopheles mosquitoes
that transmit malaria are common, the doctors immediately suspected he had contracted malaria,
because his symptoms matched those generally expected of people with malaria. 6. Choose the
correct answer. Which of the following could be collected from the patient to confirm the
diagnosis? (1 point) - Blood - Urine - Sputum - Pus exudate 7. Choose the correct answer. What
is the genus name of the microorganism that causes malaria? (1 point) - Paramecium -Anopheles
- Plasmodium -Pseudomonas 8. True or false. The life cycle of the malarial parasite consists of
two phasesthe asexual phase, which is carried out in a human, and the sexual phase, which is
carried out in a mosquito. (1 point) 9. Choose the correct answer. Which of the following are
asexual, spindle-shaped cells injected into a human when the female Anopheles mosquito bites
them for feeding? (1 point) - Sporozoites - Trophozoites - Merozoites - Schizont 10. Choose the

2. correct answer. Which organ do these asexual cells infect to undergo schizogony, generating
numerous daughter parasites? (1 point) - Brain - Liver - Heart - Spleen 11. Choose the correct
answer. Exoerythrocytic development ends with the production of these cells that return to the
circulation and invade red blood cells. (1 point) - Sporozoites - Trophozoites - Merozoites -
Schizont 12. Choose all of the correct answers. Humans can reduce their risk of malaria by doing
the following: (2 points) - taking one of three widely available vaccines -using bed nets treated
with insecticides -taking weekly prophylactic drugs