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In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]
- a)surving malarial parasites in human carriers
- b)surviving sporozoites in surviving mosquitoes
- c)monkeys
- d)mosquito larvae in permanent waters
Correct answer is option 'B'. Can you explain this answer?
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In hot summer and cold winter, the number of malaria cases as well as ...
Because in humid season breeding season of mosquito increases which cause the increase in population nd plasmodium lives in mosquito hence plasmodium also increases which cause increases infection of malaria nd alll
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In hot summer and cold winter, the number of malaria cases as well as ...
Explanation:
In hot summer and cold winter, the number of malaria cases as well as Anopheles mosquitoes (which transmit the malaria parasite) declines. This is because mosquitoes are ectothermic organisms and are sensitive to extreme temperatures. They are not able to survive in very hot or very cold conditions. Similarly, the parasites that cause malaria also have a reduced survival rate in extreme temperatures.
However, the reappearance of malaria in humid warm conditions can be attributed to surviving sporozoites in surviving mosquitoes. Here's a detailed explanation:
1. Life cycle of the malaria parasite:
- Malaria is caused by the Plasmodium parasite, which has a complex life cycle involving both humans and mosquitoes.
- The cycle begins when a female Anopheles mosquito infected with the parasite bites a human and injects sporozoites (the infective stage of the parasite) into the bloodstream.
- The sporozoites then travel to the liver, where they multiply and develop into merozoites.
2. Impact of extreme temperatures:
- In hot summer and cold winter, the number of Anopheles mosquitoes decreases as they are unable to survive in these extreme temperatures.
- Similarly, the malarial parasites also have a reduced survival rate in extreme temperatures.
3. Reappearance in humid warm conditions:
- In humid warm conditions, where the temperature is suitable for the survival of mosquitoes, the surviving mosquitoes can still harbor the malaria parasite.
- These mosquitoes may have ingested sporozoites during their previous blood meals on infected humans.
- The surviving sporozoites can then develop into merozoites within the mosquitoes and be ready to infect humans again.
4. Transmission to humans:
- When the infected mosquito bites a human, it injects the merozoites into the bloodstream.
- The merozoites invade red blood cells and multiply, leading to the symptoms of malaria.
Conclusion:
The reappearance of malaria in humid warm conditions is primarily due to the survival of sporozoites in surviving mosquitoes. These mosquitoes can still transmit the parasite to humans, leading to the resurgence of malaria cases. It is important to control mosquito populations and take preventive measures to reduce the risk of malaria transmission.
In hot summer and cold winter, the number of malaria cases as well as Anopheles mosquitoes (which transmit the malaria parasite) declines. This is because mosquitoes are ectothermic organisms and are sensitive to extreme temperatures. They are not able to survive in very hot or very cold conditions. Similarly, the parasites that cause malaria also have a reduced survival rate in extreme temperatures.
However, the reappearance of malaria in humid warm conditions can be attributed to surviving sporozoites in surviving mosquitoes. Here's a detailed explanation:
1. Life cycle of the malaria parasite:
- Malaria is caused by the Plasmodium parasite, which has a complex life cycle involving both humans and mosquitoes.
- The cycle begins when a female Anopheles mosquito infected with the parasite bites a human and injects sporozoites (the infective stage of the parasite) into the bloodstream.
- The sporozoites then travel to the liver, where they multiply and develop into merozoites.
2. Impact of extreme temperatures:
- In hot summer and cold winter, the number of Anopheles mosquitoes decreases as they are unable to survive in these extreme temperatures.
- Similarly, the malarial parasites also have a reduced survival rate in extreme temperatures.
3. Reappearance in humid warm conditions:
- In humid warm conditions, where the temperature is suitable for the survival of mosquitoes, the surviving mosquitoes can still harbor the malaria parasite.
- These mosquitoes may have ingested sporozoites during their previous blood meals on infected humans.
- The surviving sporozoites can then develop into merozoites within the mosquitoes and be ready to infect humans again.
4. Transmission to humans:
- When the infected mosquito bites a human, it injects the merozoites into the bloodstream.
- The merozoites invade red blood cells and multiply, leading to the symptoms of malaria.
Conclusion:
The reappearance of malaria in humid warm conditions is primarily due to the survival of sporozoites in surviving mosquitoes. These mosquitoes can still transmit the parasite to humans, leading to the resurgence of malaria cases. It is important to control mosquito populations and take preventive measures to reduce the risk of malaria transmission.
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In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer?
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In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer?.
In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, Reappearance of malaria in humid warm conditions is due to [1990]a)surving malarial parasites in human carriersb)surviving sporozoites in surviving mosquitoesc)monkeysd)mosquito larvae in permanent watersCorrect answer is option 'B'. Can you explain this answer?.
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