# DBT JRF 2020 — Question 86

Exam: DBT JRF 2020 · Section: B · Topic: Microbiology · Difficulty: Easy

## Question

Which of the following is NOT an arboviral infection?

## Options

- **A.** Dengue fever
- **B.** Chikungunya fever
- **C.** Zika virus disease
- **D.** COVID-19

## Answer

Option D

## Explanation

Arboviruses (arthropod-borne viruses) are transmitted to vertebrate hosts via the bite of infected arthropod vectors (mosquitoes, ticks, sandflies): Dengue fever — Dengue virus (DENV 1–4, Flaviviridae), transmitted by Aedes aegypti and Ae. albopictus. Zika virus disease — Zika virus (Flaviviridae), transmitted by Aedes mosquitoes. Chikungunya fever — Chikungunya virus (Togaviridae, Alphavirus), transmitted by Aedes mosquitoes. COVID-19 — SARS-CoV-2 (Coronaviridae, Betacoronavirus), spreads via respiratory droplets, aerosols, and fomites. NO arthropod vector is involved in SARS-CoV-2 transmission. Therefore COVID-19 is NOT an arboviral infection.

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