Angiostrongylus cantonensis (commonly referred to as the rat lungworm)
Angiostrongylus cantonensis Details:
Type:
Helminth (parasitic roundworm)
Category:
Nematodes (Roundworms)
Transmission Type:
Foodborne (ingestion of contaminated snails, slugs, or produce)
Primary Target Area:
Central nervous system (brain and spinal cord)
Lifecycle Form:
Larval stage (infective third-stage larvae), adult worm (in rats)
Incubation Period:
Symptoms typically develop 1 to 3 weeks after ingestion.
Transmission:
Angiostrongylus cantonensis infection occurs when infective larvae are ingested. Humans are accidental hosts. The parasite normally completes its lifecycle in rats, with snails and slugs serving as intermediate hosts.
- Eating raw or undercooked snails or slugs
- Consuming contaminated produce with small snails or slug slime
- Eating undercooked freshwater shrimp, crabs, or frogs (rare)
Angiostrongylus cantonensis Is Found In
- Southeast Asia
- Pacific Islands
- Hawaii
- Caribbean
- Parts of the southern United States
Distribution has expanded in recent decades.
Is Angiostrongylus cantonensis Common?
Human infection is relatively uncommon but has increased in some tropical and subtropical regions. Most cases are sporadic and linked to food exposure.
Information about Angiostrongylus cantonensis:
Angiostrongylus cantonensis is a parasitic roundworm that primarily infects rats. In humans, larvae migrate to the central nervous system but cannot mature fully.
This migration can trigger inflammation of the membranes surrounding the brain, a condition known as eosinophilic meningitis.
Diagnosis may involve spinal fluid analysis, antibody testing, and clinical history of exposure.
Possible Symptoms of Angiostrongylus cantonensis
- Severe headache
- Neck stiffness
- Nausea and vomiting
- Tingling or painful sensations in skin
- Fever
In rare severe cases:
- Neurological impairment
- Confusion
- Weakness
How long does Angiostrongylus cantonensis last (Duration)?
Symptoms may last several weeks. In most cases, the infection is self-limiting as the larvae eventually die, but inflammation may persist during recovery.
Anything Else Relevant to Angiostrongylus cantonensis
- Also known as rat lungworm
- Humans are accidental hosts
- Causes eosinophilic meningitis
- Associated with contaminated produce
- Proper food washing reduces risk
High Risk Groups for Angiostrongylus cantonensis
- Individuals consuming raw snails or slugs
- People eating unwashed produce in endemic areas
- Residents of tropical and subtropical regions
Preventing Angiostrongylus cantonensis
Prevention Measures May Include:
- Washing fruits and vegetables thoroughly
- Avoiding raw or undercooked snails and slugs
- Cooking freshwater animals properly
- Controlling rodent populations
Added Complications from Angiostrongylus cantonensis
Possible Complications (in some cases):
- Eosinophilic meningitis
- Persistent neurological symptoms
- Rare severe neurological impairment
Medical evaluation is recommended for severe headache or neurological symptoms following possible exposure.
