Giant African
Land Snail
(Click on an image below to see the captioned full-size version) |
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Figure 1 |
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Figure 2 |
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Figure 3 |
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Figure 4 |
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Figure 5 |
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Scientific
Name: Achatina fulica
Common Names: Giant African Land Snail
HUMAN HEALTH
RISK
Giant African Snails are carriers of the rat parasite,
Angiostrongylus cantonensis. This
parasite can be contracted by ingesting improperly cooked
snail meat or by handling live snails and transferring
snail mucus to the human mucus membranes such as those
in the eyes, nose, and mouth.
If you have a Giant African Land Snail,
PLEASE DO NOT RELEASE IT OUTSIDE OR GIVE IT AWAY. You
will not be penalized for voluntarily turning in a Giant
African Land Snail. Please call Tricia Sharp at 617.565.7035
(office) or 617.851.7860 (cell) if you have a Giant
African Land Snail in your possession. If you reside
outside the state of Massachusetts, please contact your
contact State Department of Agriculture or the APHIS
State Plant Health Director.
Known
Hosts:
Over 500 plant species including beans, peas, cucumbers,
carrots, onions, potatoes, spinach, broccoli, cabbage,
and melons. The Giant African Land Snail is considered
one of the most damaging land snails in the world.
Key
ID Features: |
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The exotic African
snails are much larger than any of the native snails
in the northeastern United States. |
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When fully mature, these snails
may reach lengths of almost 8 inches (30cm) with
a diameter of 4 inches (10cm). Snails are usually
about 3 inches (7-8cm tall). (Figure 1) |
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The shell in cone-shaped and
about twice as tall as it is wide. When the snail
is fully grown, the shell of A.fulica
consists of seven to nine whorls. (Figure 2) |
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The shell is usually brown
in color with irregular darker streaks running across
the whorls. (Figures 3 & 4) |
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Each snail contains male and
female reproductive organs and can produce up to
1,200 eggs a year. (Figure 5) |
Similar species:
Giant Ghana tiger snail (Achatina
achatina), margies (Archachatina marginata),
and Limicolaria auroria are other African snails
capable of causing damage to many crops. They also serve
as a vector of the parasite Angiostrongylus cantonensis.
For more information and photos of these species
please visit the USDA, APHIS website at: http://www.aphis.usda.gov/plant_health/plant_pest_info/gas/index.shtml
Fact
sheets and references:
Giant African Landsnails: Pest Alert from USDA, APHIS
http://www.aphis.usda.gov/plant_health/plant_pest_info/gas/index.shtml
The Giant African Snail: A Problem
in Economic Malacology by Albert R. Mead
http://www.hear.org/books/tgas1961/
Safeguarding,Intervention,
and Trade Compliance Officers Confiscate Giant African
Snails in Wisconsin
A USDA, APHIS Pest Alert, Publication Number 81-35-008
Letter about Giant African Land Snails to Teachers and Educators from USDA, APHIS
http://massnrc.org/pests/linkeddocuments/snail.doc
Alert for Trade in Achatina spp.,
GIANT AFRICAN SNAILS, as Pets from the North American
Plant Protection Organization's Phytosanitary Alert
System
http://www.pestalert.org/pestnewsdetails2.cfm?refID=92&keyword=GIANT%20AFRICAN%20SNAILS
Angiostrongylus Infection
(parasite carried by Giant African Snails)
Center for Disease Control, Division of Parasitic Diseases
http://www.cdc.gov/ncidod/dpd/parasites/angiostrongylus/factsht_angiostrongylus.htm
Achatina fulica from
the Global Invasive Species Database
http://www.issg.org/database/species/ecology.asp?si=64&fr=1&sts=sss
last reviewed February 25, 2008
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