Jul 10, 2019
HONOLULU – The Hawai‘i Department of Health (DOH) has received notification from the
Centers for Disease Control and Prevention (CDC) of a laboratory-confirmed case of
angiostrongyliasis, or rat lungworm disease, in an adult visitor to Hawai‘i Island. With the
additional case confirmed by CDC, this brings the statewide total to six cases of individuals
confirmed with angiostrongyliasis in 2019. This includes three residents and three visitors all of which likely contracted the disease on Hawai‘i Island.
The sixth individual was an adult resident of the U.S. mainland and was traveling in West
Hawai‘i when they were infected with the parasite causing rat lungworm disease. The individual
became ill in early February and was hospitalized on the mainland for a short time for their symptoms.
The investigation was not able to identify an exact source of infection.
However, they reported eating a lot of fresh fruits and not washing them all before eating them. “Washing fresh fruits and vegetables carefully no matter where they come from is an important step to preventing rat lungworm disease,” said Dr. Sarah Park, state epidemiologist.
“Thoroughly inspecting and rinsing produce under clean, running water is the most effective way to remove pests and other contaminants.”
DOH provides the following recommendations to prevent rat lungworm disease:
• Wash all fruits and vegetables under clean, running water to remove any tiny slugs or
snails. Pay close attention to leafy greens.
• Control snail, slug, and rat populations around homes, gardens and farms. Get rid of
these vectors safely by clearing debris where they might live, and also using traps and
baits. Always wear gloves for safety when working outdoors.
• Inspect, wash, and store produce in sealed containers, regardless of whether it came
from a local retailer, farmer’s market, or backyard garden.
For more information about rat lungworm disease and how to prevent its spread, visit:
• DOH website: http://health.hawaii.gov/docd/disease_listing/rat-lungwormangiostrongyliasis/
• HDOA website: http://hdoa.hawaii.gov/blog/main/rat-lungworm-information/
• CTAHR website: http://manoa.hawaii.edu/ctahr/farmfoodsafety/rat-lungworm/
• CDC website: https://www.cdc.gov/parasites/angiostrongylus/index.html
Angiostrongyliasis, commonly known as rat lungworm disease, is caused by a parasitic
roundworm and can have debilitating effects on an infected person’s brain and spinal cord.
In Hawai‘i, most people become ill by accidentally ingesting a snail or slug infected with the
parasite Angiostrongylus cantonensis (A. cantonensis). Symptoms vary widely between cases, and the most common ones include severe headaches and neck stiffness. The most serious cases experience neurological problems, severe pain and long-term disability.
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