Sandfly

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Bites on thigh from sandfly
Indonesian sandfly bites on leg
New Zealand Sandfly biting a human's little finger
Sandfly bite
A swarm of sandflies at Georges River National Park (Australia)

Sandfly (or sand fly) is a colloquial name for any species or genus of flying, biting, blood-sucking Dipteran encountered in sandy areas. In the United States, sandfly may refer to certain horse flies that are also known as "greenheads" (family Tabanidae), or to members of the family Ceratopogonidae, also known in Florida and elsewhere as a sand gnat, sandflea, no-see-um (no-see-em, noseeum), granny nipper, chitra, punkie, or punky. Outside the United States, sandfly may refer to members of the subfamily Phlebotominae within the Psychodidae. Biting midges (Ceratopogonidae) are sometimes called sand flies or no-see-ums (no-see-em, noseeum). New Zealand sandflies are in the Austrosimulium genus, a type of black fly.[1]

While horse flies are large flies, noseeums (sandfleas) and some Old-World sandflies are tiny midges. Sandfly bites may leave large, red itchy bumps that may turn into a rash. These bumps are frequently several times as itchy as mosquito bites, and tend to last longer as well.

In the various sorts of sandfly only the female is responsible for biting and sucking the blood of mammals, reptiles and birds. She requires the protein in the blood to make her eggs.

Some sandfly genera of the Phlebotominae subfamily are the primary vectors of leishmaniasis and pappataci fever; both diseases are confusingly referred to as sandfly fever. In the New World, leishmaniasis is spread by sand flies of the genus Lutzomyia; in the Old World, the disease is spread by sandflies of the genus Phlebotomus. Belize and Honduras are notorious in the Caribbean for their sandfly populations and travel pages frequently warn tourists to bring bug spray containing high concentrations of DEET.

Viruses[edit]

Among the viruses that sandflies can carry are Chandipura virus, which as a cousin of rabies, is very deadly as in an outbreak in India in 2010.

Protozoa[edit]

Leishmania donovani: causing spiking fevers, hepatosplenomegaly, and pancytopenia. Can be diagnosed though Microscopic review by visualizing amastigotes in containing macrophages. Treatable with Sodium stibogluconate.

Prevention[edit]

Counter-top repellents with high concentration of DEET or picaridin are proven to work, but may not be suitable to some people, e.g. people with sensitive skin and pregnant women.

A particular extract of Lemon Eucalyptus oil (not the essential oil) has now been shown to be as effective as DEET in various studies.[2][3]

Most information on repellents focuses on mosquitos, but mosquito repellents are effective for sandflies and midges as well.[4]

Cultural views[edit]

New Zealand sandflies have a native Māori legend wherein "the god Tu-te-raki-whanoa had just finished creating the landscape of Fiordland, it was absolutely stunning... so stunning that it stopped people from working. They just stood around gazing at the beauty instead. The goddess Hinenuitepo became angry at these unproductive people, so she created the sandfly to bite them and get them moving"[5]

These sand flies were able, according to another Maori legend, to revive the dead hero Ha-tupatu.[6]

In moral philosophy, the nature of sandflies is used as an analogy for a particular implied inference, the "noseeum inference", where one fallaciously concludes that since one cannot see something, it therefore cannot exist.[7]

References[edit]

  1. ^ Sandflies and mosquitoes – Sandflies: New Zealand’s blackflies. Te Ara - the Encyclopedia of New Zealand. (2009-03-01). Retrieved on 2011-06-15.
  2. ^ Trigg, JK (1996). "Evaluation of a eucalyptus-based repellent against Culicoides impunctatus (Diptera:Ceratopogonidae) in Scotland". Journal of the American Mosquito Control Association 12 (2 Pt 1): 329–30. PMID 8827615. 
  3. ^ Carroll, SP; Loye, J (2006). "Field test of a lemon eucalyptus repellent against Leptoconops biting midges". Journal of the American Mosquito Control Association 22 (3): 483–5. doi:10.2987/8756-971X(2006)22[483:FTOALE]2.0.CO;2. PMID 17067050. 
  4. ^ CDC: West Nile Virus – Updated Insect Repellent. Cdc.gov (2009-10-13). Retrieved on 2011-06-15.
  5. ^ Sandflies – New Zealand – IgoUgo – stomps. IgoUgo (2008-06-04). Retrieved on 2011-06-15.
  6. ^ Ha-tupatu and the sand flies. Maori.org.nz. Retrieved on 2011-06-15.
  7. ^ http://www.iep.utm.edu/evil-evi/

External links[edit]