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VCEHP Module Questions and Answers Rated A+ What does the term "vectors" refer to in the context of disease transmission? Vectors are organisms, typically arthropods like mosquitoes or ticks, that transmit pathogens from one host to another, facilitating the spread of diseases. How do...

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  • 16 augustus 2024
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VCEHP Module Questions and Answers
Rated A+
What does the term "vectors" refer to in the context of disease transmission?


✔✔ Vectors are organisms, typically arthropods like mosquitoes or ticks, that transmit pathogens

from one host to another, facilitating the spread of diseases.




How do mosquitoes act as vectors for diseases such as malaria and dengue fever?


✔✔ Mosquitoes carry pathogens in their saliva, which they inject into humans when feeding,

thereby transmitting diseases like malaria and dengue fever.




What role do ticks play as vectors in the transmission of Lyme disease?


✔✔ Ticks transmit the bacterium *Borrelia burgdorferi* through their saliva during blood-

feeding, leading to the spread of Lyme disease.




How does the lifecycle of a vector influence its ability to transmit diseases?


✔✔ The lifecycle, including the stages of egg, larva, pupa, and adult, affects the vector’s

capacity to acquire, maintain, and transmit pathogens during its development and feeding phases.




1

,What are the key factors that contribute to the effectiveness of a vector in disease transmission?


✔✔ Factors include the vector's lifespan, feeding behavior, habitat, and the ability of the

pathogen to reproduce and survive within the vector.




How does climate change impact the distribution and activity of disease vectors?


✔✔ Climate change can alter temperature and precipitation patterns, affecting vector habitats,

seasonal activity, and geographical range, potentially increasing disease transmission.




What preventive measures can be taken to reduce the risk of vector-borne diseases?


✔✔ Measures include using insect repellent, wearing protective clothing, eliminating standing

water where vectors breed, and implementing vector control programs.




How does genetic modification of vectors aim to control the spread of diseases?


✔✔ Genetic modification techniques, such as creating genetically modified mosquitoes that are

resistant to pathogens or incapable of reproducing, aim to reduce the population of vectors and

interrupt disease transmission.




What are some examples of emerging diseases associated with new or changing vectors?




2

, ✔✔ Emerging diseases include Zika virus, which has spread due to changes in the distribution of

Aedes mosquitoes, and chikungunya, linked to shifts in vector populations and habitats.




How do public health strategies integrate vector control to combat disease outbreaks?


✔✔ Public health strategies involve surveillance of vector populations, community education,

environmental management to reduce vector breeding sites, and coordinated efforts to implement

vector control measures.




What challenges are faced in developing vaccines or treatments for vector-borne diseases?


✔✔ Challenges include the complexity of the pathogens, the need for vaccines to be effective

against multiple strains, vector resistance to control measures, and the difficulty of reaching and

treating affected populations in remote areas.




How does the study of vector ecology contribute to the prevention and control of vector-borne

diseases?


✔✔ Understanding vector ecology helps identify breeding sites, patterns of vector movement,

and interactions between vectors and pathogens, allowing for more targeted and effective control

strategies.




What defines a vector?

3

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