HM1 Advancement (Malaria Control)
Malaria control
Questions and Answers
- 1.
Which of the four species of Plasmodium is the most dangerous?
- A.
P. ovale
- B.
P. malariae
- C.
P. vivax
- D.
P. falciparum
Correct Answer
D. P. falciparumExplanation
P. falciparum is the most dangerous species of Plasmodium because it is responsible for the majority of severe malaria cases and deaths. It can cause complications such as cerebral malaria, organ failure, and anemia. P. falciparum is also known for its ability to develop resistance to antimalarial drugs, making it more difficult to treat.Rate this question:
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- 2.
Plasmodum requires _____ hosts to complete its life cycle
- A.
2
- B.
4
- C.
1
- D.
3
Correct Answer
A. 2Explanation
Plasmodium, the parasite that causes malaria, requires two hosts to complete its life cycle. The first host is a female Anopheles mosquito, which acts as the vector and transmits the parasite to humans through its bite. Once inside the human body, the Plasmodium infects and multiplies within the liver cells. After a period of development, the parasite is released into the bloodstream, where it infects and destroys red blood cells. When another mosquito bites an infected human, it ingests the Plasmodium, which then undergoes further development within the mosquito's gut. Eventually, the parasite migrates to the mosquito's salivary glands, ready to be transmitted to another human when the mosquito feeds again. Thus, the Plasmodium life cycle involves two hosts - humans and mosquitoes.Rate this question:
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- 3.
If a sample smear is negative, how often should the sample be repeated?
- A.
Every 4-6 hours for 24-36 hours.
- B.
Every 2-4 hours for 24-36 hours.
- C.
Every 6-8 hours for 24-36 hours.
- D.
Every 8-10 hours for 24-36 hours.
Correct Answer
C. Every 6-8 hours for 24-36 hours.Explanation
If a sample smear is negative, it should be repeated every 6-8 hours for 24-36 hours. This frequency allows for multiple opportunities to detect any potential changes or abnormalities in the sample. By repeating the sample every 6-8 hours, it increases the likelihood of identifying any potential issues that may have been missed in previous tests. This timeframe of 24-36 hours ensures that the sample is thoroughly evaluated over an extended period of time, reducing the chances of false negatives.Rate this question:
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- 4.
What is the dosage for Doxycycline over a 7 day period as part of malaria
- A.
50 mg oral bid
- B.
75 mg oral bid
- C.
650 mg oral bid
- D.
100 mg oral bid
Correct Answer
D. 100 mg oral bidExplanation
The correct answer is 100 mg oral bid. Doxycycline is commonly used as a prophylactic treatment for malaria. The dosage for a 7-day period would typically be 100 mg taken orally twice a day. This dosage helps to ensure that an adequate amount of the medication is in the system to prevent the development of malaria.Rate this question:
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- 5.
If a sample smear is positve for malaria, the smear should be repeated once a day while there are symptoms present and during treatment .
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement suggests that if a sample smear is positive for malaria, it should be repeated once a day while there are symptoms present and during treatment. However, this is not true. The frequency of repeating the smear depends on the specific guidelines and recommendations of healthcare professionals. It is not necessary to repeat the smear every day, but rather as per the recommended schedule for monitoring the progress of treatment and to ensure the effectiveness of the treatment.Rate this question:
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- 6.
What is the name of the male/female sexual forms of the malaria parasite?
- A.
Merozoites
- B.
Hypnozoites
- C.
Gametocytes
- D.
Chemoprophylaxis
Correct Answer
C. GametocytesExplanation
Gametocytes are the male and female sexual forms of the malaria parasite. They are produced in the human host after the asexual reproduction of the parasite in red blood cells. When a mosquito bites an infected person, it ingests the gametocytes along with the blood. Inside the mosquito, the gametocytes undergo sexual reproduction, forming male and female gametes. These gametes fuse to form a zygote, which then develops into an infective form called sporozoites. The sporozoites migrate to the mosquito's salivary glands and can be transmitted to another human when the mosquito bites again, thus continuing the malaria life cycle.Rate this question:
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- 7.
Malaria in Southeast Asia was demonstrated resistance to which malaria
- A.
Quinine and Primaquine
- B.
Doxycycline and Melfoquine
- C.
Chloroquine and Primaquine
- D.
Melfoquine and Chlorquine
Correct Answer
D. Melfoquine and ChlorquineExplanation
The correct answer is Melfoquine and Chlorquine. Malaria in Southeast Asia has demonstrated resistance to these two drugs. This means that the parasites causing malaria in this region have developed the ability to survive and multiply despite the presence of Melfoquine and Chlorquine in the body. This resistance poses a challenge in effectively treating and controlling malaria in Southeast Asia, as alternative drugs may need to be used to combat the resistant strains of the malaria parasite.Rate this question:
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- 8.
Malaria transmission is carried by the male Anopheles mosquito
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because malaria transmission is actually carried by the female Anopheles mosquito. Only female mosquitoes feed on human blood, and when they bite an infected person, they can transmit the malaria parasite to another person when they bite them. Male mosquitoes do not bite humans and therefore do not transmit malaria.Rate this question:
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- 9.
How long before sporozoites, that have infected the liver cells, disappear from the bloodstream?
- A.
30 minutes
- B.
2 hours
- C.
1 day
- D.
2 days
Correct Answer
A. 30 minutesExplanation
After infecting the liver cells, sporozoites go through a process called "pre-erythrocytic schizogony" where they multiply and develop into merozoites. Once this process is complete, the merozoites are released into the bloodstream to infect red blood cells. This entire process takes approximately 30 minutes, which means that sporozoites disappear from the bloodstream within this time frame.Rate this question:
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- 10.
Where should blood be taken from to perfom a smear?
- A.
Arterial, capillary or venous blood
- B.
Arterial and capillary blood
- C.
Capillary or venous blood
- D.
Arterial and venous blood
Correct Answer
C. Capillary or venous bloodExplanation
Blood can be taken from either capillaries or veins to perform a smear. A smear is a technique used to spread a thin layer of blood on a microscope slide for examination. Capillary blood can be obtained by pricking the skin with a lancet, while venous blood is collected by inserting a needle into a vein. Both capillary and venous blood can provide valuable information for diagnostic purposes, such as identifying abnormalities in blood cells or detecting infections.Rate this question:
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- 11.
__________ is the first line of defense against mosquito bites.
- A.
Bed nets
- B.
Spraying yourself with DEET
- C.
Prescribed medication
- D.
Minimize skin exposure
Correct Answer
D. Minimize skin exposureExplanation
Minimizing skin exposure is the first line of defense against mosquito bites because it reduces the surface area available for mosquitoes to land on and bite. By covering up with long sleeves, pants, and closed-toe shoes, and by using mosquito repellent on exposed skin, individuals can greatly reduce their risk of being bitten by mosquitoes. This method is effective in preventing mosquito-borne diseases such as malaria, dengue fever, and Zika virus.Rate this question:
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- 12.
How long should personnel continue to take antimalarial medication upon return from deployment?
- A.
One week
- B.
Two week
- C.
Four weeks
- D.
Three weeks
Correct Answer
C. Four weeksExplanation
Personnel should continue to take antimalarial medication for four weeks upon return from deployment. This is because the medication needs to be taken for a sufficient duration to ensure complete protection against malaria. Malaria parasites can remain dormant in the body for several weeks, and by continuing the medication for four weeks, it helps to eliminate any potential remaining parasites and prevent the development of the disease.Rate this question:
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- 13.
In what two Plasmodium species does the sporozoite remain dormant in the liver?
- A.
P. vivax and P. malarie
- B.
P. ovale and P. vivax
- C.
P. falciparum and P. ovale
- D.
P. falciparum and P. malaraie
Correct Answer
B. P. ovale and P. vivax -
- 14.
What personal prevention methods should personnel be utilizing during deployment? CHECK ALL THAT APPLY.
- A.
Bed nets sprayed with permthrin
- B.
Pest control collar
- C.
Skin so soft
- D.
DEET
Correct Answer(s)
A. Bed nets sprayed with permthrin
D. DEETExplanation
Personnel should be utilizing bed nets sprayed with permethrin and DEET as personal prevention methods during deployment. Bed nets sprayed with permethrin are effective in preventing mosquito bites and reducing the risk of contracting vector-borne diseases. DEET is a commonly used insect repellent that provides protection against various insects, including mosquitoes. The other options, pest control collar and Skin so soft, are not mentioned as effective personal prevention methods in this context.Rate this question:
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- 15.
Which type of malaria has a 3 day cycle and can last a lifetime?
- A.
P. vivax
- B.
P. malariae
- C.
P. falciparum
- D.
P. ovale
Correct Answer
B. P. malariaeExplanation
P. malariae is the correct answer because it is the type of malaria that has a 3-day cycle. Unlike other types of malaria, P. malariae can persist in the body for a lifetime. This means that even after initial infection, the parasite can remain dormant and cause recurrent episodes of malaria throughout a person's life.Rate this question:
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- 16.
Where does a malaria parasite mature?
- A.
Blood stream
- B.
Liver
- C.
Kidney
- D.
Pancreas
Correct Answer
B. LiverExplanation
A malaria parasite matures in the liver. After being transmitted to a human through a mosquito bite, the parasite travels to the liver where it multiplies and matures. It then leaves the liver and enters the bloodstream, where it infects red blood cells and causes the symptoms of malaria. The liver stage of the parasite's life cycle is an important target for antimalarial drugs, as they can prevent the parasite from maturing and spreading to the bloodstream.Rate this question:
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- 17.
What is the primary vector of malaria?
- A.
Human to human
- B.
Anopheles mosquito
- C.
Plasmodium
- D.
Blood transfusion
Correct Answer
B. Anopheles mosquitoExplanation
The primary vector of malaria is the Anopheles mosquito. Malaria is a mosquito-borne disease, and the Anopheles mosquito is responsible for transmitting the Plasmodium parasite, which causes malaria, to humans. The mosquito becomes infected with the parasite when it bites an infected person and then spreads the infection to other individuals when it bites them. Human to human transmission of malaria is not possible, and while Plasmodium is the causative agent of malaria, it is transmitted through the bite of the Anopheles mosquito. Blood transfusion can be a mode of transmission in rare cases, but it is not the primary vector.Rate this question:
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- 18.
What is the primary method to avoid malaria infection?
- A.
Use of sunscreen
- B.
Limited visits to malaria-endemic areas
- C.
Avoid getting bit
- D.
Regular medication
Correct Answer
C. Avoid getting bitExplanation
The primary method to avoid malaria infection is to avoid getting bit by mosquitoes. Mosquitoes are the carriers of the malaria parasite, so by preventing mosquito bites, the risk of contracting malaria is significantly reduced. This can be achieved by using mosquito repellents, wearing protective clothing, using bed nets, and staying indoors during peak mosquito activity times.Rate this question:
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- 19.
What is the malaria incubation period for P. vivax?
- A.
18 - 40 days
- B.
12 - 17 days
- C.
16 - 18 days
- D.
9 - 14 days
Correct Answer
B. 12 - 17 daysExplanation
The malaria incubation period for P. vivax is the time between the mosquito bite and the onset of symptoms. The correct answer is 12 - 17 days, which means that it takes approximately 12 to 17 days for symptoms to appear after being infected with P. vivax. It is important to note that the incubation period can vary depending on factors such as the individual's immune system and the strain of the parasite.Rate this question:
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- 20.
_______ are Standard Naval Letters sent from more than one person
- A.
Naval Messages
- B.
Joint Letters
- C.
From-To memorandums
- D.
Multiple Address Letters
Correct Answer
B. Joint LettersExplanation
Joint Letters are Standard Naval Letters sent from more than one person. This means that they are collaborative letters that involve multiple individuals in their composition or endorsement. These letters are commonly used in naval communication to ensure that the message is endorsed and approved by multiple parties before being sent.Rate this question:
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- 21.
Young Trophozoite Stage for the malaria parasite.
- A.
Gametocytes
- B.
Ring Stage
- C.
Schizonts
- D.
Trophozoites
Correct Answer
B. Ring StageExplanation
The correct answer is "Ring Stage" because during this stage, the malaria parasite appears as a ring-shaped structure inside the red blood cells. This stage is characterized by the presence of a single nucleus and is often associated with symptoms such as fever and chills. The ring stage is crucial for the diagnosis of malaria as it helps in distinguishing the disease from other similar conditions.Rate this question:
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- 22.
Developmental Stage for the malaria parasite.
- A.
Gametocytes
- B.
Ring Stage
- C.
Schizonts
- D.
Trophozoites
Correct Answer
D. TrophozoitesExplanation
Trophozoites are the developmental stage of the malaria parasite that occurs after the ring stage. During this stage, the parasite feeds on and replicates within the red blood cells, causing the symptoms of malaria. Trophozoites are characterized by their larger size and distinct appearance, with a single nucleus and a granular cytoplasm. They continue to multiply and mature into schizonts, which eventually rupture the red blood cells, releasing more parasites into the bloodstream. Therefore, trophozoites play a crucial role in the progression of the malaria infection.Rate this question:
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- 23.
Cellular Division Forming Merozoites Stage for the malaria parasite.
- A.
Gametocytes
- B.
Ring Stage
- C.
Schizonts
- D.
Trophozoites
Correct Answer
C. SchizontsExplanation
Schizonts are a stage in the cellular division of the malaria parasite. During this stage, the parasite undergoes multiple rounds of nuclear division, resulting in the formation of merozoites. These merozoites are then released from the host cell and go on to infect new red blood cells, continuing the cycle of infection. The other options, gametocytes, ring stage, and trophozoites, represent different stages in the life cycle of the parasite but do not specifically refer to the formation of merozoites. Therefore, the correct answer is Schizonts.Rate this question:
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- 24.
Sexually Differentiated Forms Stage for the malaria parasite.
- A.
Gametocytes
- B.
Ring Stage
- C.
Schizonts
- D.
Trophozoites
Correct Answer
A. GametocytesExplanation
Gametocytes are the sexually differentiated forms of the malaria parasite. During this stage, the parasite develops into male and female gametes, which are necessary for the transmission of the disease. Gametocytes are formed within the human host and are ingested by mosquitoes during a blood meal. Inside the mosquito, the gametocytes undergo further development and fertilization, leading to the production of sporozoites, which can infect new hosts when the mosquito bites again. The other stages mentioned, such as ring stage, schizonts, and trophozoites, are different developmental stages of the malaria parasite within the human host, but they are not sexually differentiated forms.Rate this question:
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Mar 21, 2023Quiz Edited by
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Feb 22, 2010Quiz Created by
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