Zika virus infection is primarily transmitted to humans through the bite of which of the following vectors?

NORCET 10 Mains

Applied Microbiology & Infection control

Easy

Appeared in: NORCET 10 Mains

Explanation

The primary vector for the Zika virus is the Aedes mosquito, particularly the species Aedes aegypti and Aedes albopictus.
These mosquitoes are known as 'tiger mosquitoes' due to their characteristic black and white striped markings.
Aedes mosquitoes are daytime biters and are also responsible for transmitting other major viral diseases, including dengue, chikungunya, and yellow fever.
The geographic distribution of Aedes mosquitoes largely determines the areas at risk for Zika outbreaks.

Option A: Anopheles mosquitoes are the primary vectors for malaria, not Zika virus. They are also implicated in the transmission of filariasis in some regions.
Option C: Culex mosquitoes are known vectors for diseases like Japanese Encephalitis, West Nile Virus, and Bancroftian filariasis. They are not the primary transmitters of the Zika virus.
Option D: Phlebotomus, commonly known as sandflies, are responsible for transmitting leishmaniasis (Kala-azar) and sandfly fever. They are insects, not mosquitoes, and do not transmit Zika.

Visual 1: Comparative Chart - An infographic showing the key morphological differences between Aedes, Anopheles, and Culex mosquitoes (e.g., resting posture, wing patterns, larvae position) to aid in identification.
Visual 2: Disease Vector Table - A table similar to the one in the explanation, visually linking each vector (Aedes, Anopheles, Culex, Sandfly) to the specific diseases they transmit.
Visual 3: World Map - A map highlighting the global distribution of Aedes aegypti and Aedes albopictus, overlaid with areas that have reported Zika virus outbreaks, to illustrate the correlation between vector presence and disease risk.

Clinical Relevance

Nursing practice connection: Knowing Vector-borne diseases and their specific transmission vectors helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding the specific vector is crucial for implementing effective public health interventions, such as targeted mosquito control measures (e.g., eliminating breeding sites for Aedes mosquitoes in household containers).
Nurses play a key role in educating patients, especially pregnant women and travelers, about preventing mosquito bites in Zika-endemic areas to reduce the risk of infection and congenital Zika syndrome.
The link between Zika infection during pregnancy and microcephaly in newborns underscores the importance of preconception counseling and advising on sexual transmission prevention for couples with possible exposure.

How to Approach the Question

First, identify the key term in the question stem: 'Zika virus'.
This is a factual recall question that tests your knowledge of communicable diseases and their vectors.
Access your memory bank for the specific mosquito associated with Zika. The Aedes mosquito is famously linked to Zika, Dengue, and Chikungunya.
Systematically evaluate the other options to confirm your choice. Associate Anopheles with malaria, Culex with Japanese encephalitis, and sandflies with leishmaniasis.
This process of elimination reinforces the correct answer and strengthens your knowledge of other vector-borne diseases.

Concept Tested & Keywords

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