Are insects disease vectors?

Insects are the responsible vectors for several parasitic diseases including African sleeping sickness (African trypanosomiasis), Chagas disease (American trypanosomiasis), malaria, and leishmaniasis.

Which insect vectors transmit the virus disease?

Insects (mosquitoes, lice, fleas, bed bugs) and ticks are able to transmit a number of diseases caused by infectious agents: viruses (chikungunya virus, yellow fever, dengue fever, etc.), bacteria (Lyme disease, plague, etc.), parasites (malaria, sleeping sickness, leishmaniasis, filariasis, etc.).

What is a vector insect?

A vector is an organism that acts as an intermediary host for a parasite. Most importantly the vector transfers the parasite to the next host. Good examples of vectors are the mosquito in transmitting malaria and ticks in transferring Lyme disease.

Which vector is mostly used for insect?

List of vector-borne diseases, according to their vector

Vector Disease caused
Mosquito Anopheles Lymphatic filariasis Malaria
Culex Japanese encephalitis Lymphatic filariasis West Nile fever
Aquatic snails Schistosomiasis (bilharziasis)
Blackflies Onchocerciasis (river blindness)

Can a vector be a human?

But what about humans: Can we humans be vectors? Technically, sure, says Aiello. But Monto says he probably wouldn’t use the word to refer to humans. “To me vector is usually an arthropod [insects and other animals with exoskeletons],” Monto says.

What are three examples of viral diseases?

Examples of exanthematous viral diseases include:

  • measles.
  • rubella.
  • chickenpox/shingles.
  • roseola.
  • smallpox.
  • fifth disease.
  • chikungunya virus infection.

What makes a good insect vector?

The conditions necessary for an insect to become a vector are multiple but require an innate vector competence as a genetic basis. Next to the vector competence plenty of entomological, ecological and pathogen-related factors are decisive, given the availability of infection sources.

Can a human be a vector Why?

What are the viral diseases?

What are viral diseases?

  • Chickenpox.
  • Flu (influenza)
  • Herpes.
  • Human immunodeficiency virus (HIV/AIDS)
  • Human papillomavirus (HPV)
  • Infectious mononucleosis.
  • Mumps, measles and rubella.
  • Shingles.

How are plant viruses related to insect vectors?

Thus, four basic types of insect vector:plant virus transmission relationships were described: non-persistent; semi-persistent; persistent:circulative and persistent:propagative (see Ng and Falk, 2006 ). More recent terminology emphasizes how plant viruses interact with their insect vectors ( Blanc et al., 2014 ).

How does a virus interact with an insect?

Acquisition and transmission by an insect vector is central to the infection cycle of the majority of plant pathogenic viruses. Plant viruses can interact with their insect host in a variety of ways including both non-persistent and circulative transmission; in some cases, the latter involves virus replication in cells of the insect host.

Where are virus localization sites in insect vectors?

1. Virus localization sites in insect vectors. Non-circulative viruses are retained in the insect stylet (A) or foregut (B). Non-propagative circulative (yellow circles) viruses are generally phloem limited and penetrate the insect body via the midgut or hindgut.

Which is the best vector for plant pathogens?

Mealybugs (family Pseudococcidae) are known vectors of several plant viruses including cocoa swollen shoot virus and cocoa mottle leaf virus. Psyllids (family Psyllidae) are the vectors of mycoplasma-like organisms responsible for pear decline and greening disease of citrus.