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Microscopic infectious agent that can multiply only in living cells of animals, plants, or bacteria, consisting of genetic material, either DNA or RNA, housed inside a capsid.

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Citrus tristeza virus

Alternate terms: Hassaku dwarf virus, CTV (Citrus tristeza virus), Lime dieback virus, Citrus quick decline virus, Citrus tristeza closterovirus, Grapevine A virus

COVID-19 (Novel Coronavirus)

COVID-19, a highly infectitious respiratory disease in humans, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The virus probably emerged from an animal source in Wuhan (China) and spreaded globaly from person to person. Most people infected with COVID-19 have had mild to severe respiratory illness with symptoms of cough, fever, and shortness of breath. In some cases, patients had pneumonia in both lungs, multi-organ failure, and even death. The World Health Organization (WHO), on March 11, 2020, declared the novel COVID-19 outbreak a global pandemic. [NALT]


The Tospovirus (family Bunyaviridae) genus of viruses causes diseases of significant economic impact in many crops worldwide. Tospoviruses have the ability to swap whole segments of their genome with other members of the genus, creating new virus isolates with different vectors and modified host ranges, both of which can result in new diseases. Presently, there are eight recognized species belonging to this genus, of which five have been previously reported in the United States (i.e., TCSV, TSWV, GRSV, INSV, and Iris yellow spot virus [IYSV]). Of these, all but IYSV have been previously reported in the state of Florida. More information about tospoviruses can be found in Tospoviruses (Family Bunyaviridae, Genus Tospovirus) ( -- from PP306, Tomato Chlorotic Spot Virus

West Nile Virus

West Nile encephalitis virus. Encephalitis caused by a virus of the Flaviviridae family. Causes West Nile fever, which is characterized by headache, fever, arthralgia, maculopapular rash, myalgia, lymphadenopathy and leukopenia. Transmitted and/or spread by mosquitoes from the genus Culex (family Culicidae).

Entry terms: Kunjin virus, West Nile flavivirus, WNV (West Nile virus), KUNV (Kunjin virus)


Yellow Fever Virus

Entry terms: Flavivirus febricis, YFV (Yellow fever virus)

Yellow fever is an acute infectious disease primarily of the tropics, caused by a virus and transmitted to man by mosquitoes of the genera Aedes and Haemagogus. The severe form is characterized by fever, hemolytic jaundice, and renal damage.

Zika Virus

This page lists useful information about the Zika virus. The primary focus of the science-based information and recommendations to be found here are ways you can reduce your exposure to mosquito bites and ways you can reduce the mosquito populations around your home and neighborhood.

Good sources of information about the disease in humans are the CDC, MedlinePlus and NIH.

For current University of Florida information including communications, prevention tips, resources, and research, see the UF Zika Prevention website at

UF/IFAS resources

Entry terms: SPOV (Spondweni virus), ZIKV (Zika virus), Spondweni virus

Related IFAS Blog Posts

COVID has Improved Food Safety

Katherine AllenMarch 29th, 2021Silver Lining One of the silver linings of COVID pandemic for me as a food safety instructor has been the increased focus on handwashing and sanitizing surfaces. I am especially thrilled about increased handwashing since the correlation between health and handwashing is not visible. I am concerned that once folks get the vaccine, they will […]

Consume Safe Drinking Water During an Emergency

Brenda Marty-JimenezFebruary 17th, 2021Authors: Brenda Marty Jimenez, UF/IFAS Extension, Broward County, Agent IV Amarat Simonne, Ph.D. UF/IFAS Extension, Professor and Extension Specialist Water directly out of your tap may not be safe to drink during an emergency. Boil water orders (also called advisories) are common during hurricane season, but can also occur during lightning strikes and other incidents. […]

Protect Yourself and Prevent the Spread of Germs and Viruses

mmaddoxMarch 19th, 2020Proper Handwashing Can Reduce the Number of Harmful Microorganisms on Your Hands Handwashing is one of the best ways to protect ourselves and families from getting sick. Germs are everywhere so you need to wash your hands often with soap and water for at least 20 seconds to reduce the number of harmful microorganisms on […]

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