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PLoS Negl Trop Dis. 2009;3(1):e371. doi: 10.1371/journal.pntd.0000371. Epub 2009 Jan 27.

Taenia solium cysticercosis hotspots surrounding tapeworm carriers: clustering on human seroprevalence but not on seizures.

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1
United States Naval Medical Research Center Detachment, Public Health Training Program (AGL) and Virology Program (SMM), Lima, PerĂº.

Abstract

BACKGROUND:

Neurocysticercosis accounts for 30%-50% of all late-onset epilepsy in endemic countries. We assessed the clustering patterns of Taenia solium human cysticercosis seropositivity and seizures around tapeworm carriers in seven rural communities in Peru.

METHODOLOGY:

The presence of T. solium-specific antibodies was defined as one or more positive bands in the enzyme-linked immunoelectrotransfer blot (EITB). Neurocysticercosis-related seizures cases were diagnosed clinically and had positive neuroimaging or EITB.

PRINCIPAL FINDINGS:

Eleven tapeworm carriers were identified by stool microscopy. The seroprevalence of human cysticercosis was 24% (196/803). Seroprevalence was 21% >50 m from a carrier and increased to 32% at 1-50 m (p = 0.047), and from that distance seroprevalence had another significant increase to 64% at the homes of carriers (p = 0.004). Seizure prevalence was 3.0% (25/837) but there were no differences between any pair of distance ranges (p = 0.629, Wald test 2 degrees of freedom).

CONCLUSION/SIGNIFICANCE:

We observed a significant human cysticercosis seroprevalence gradient surrounding current tapeworm carriers, although cysticercosis-related seizures did not cluster around carriers. Due to differences in the timing of the two outcomes, seroprevalence may reflect recent T. solium exposure more accurately than seizure frequency.

PMID:
19172178
PMCID:
PMC2625436
DOI:
10.1371/journal.pntd.0000371
[Indexed for MEDLINE]
Free PMC Article
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