Toddler Treated for Rare Worm After Swallowing Cockroach
Caregivers should monitor children after accidental ingestion, as rare parasites can be transmitted through insects.
Updated on Sept. 23, 2026 in Toddlers
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A medical case report published in February 2025 details a toddler who developed a rare Moniliformis moniliformis parasitic infection after ingesting a cockroach. Despite the unusual nature of the transmission, the child remained asymptomatic and successfully cleared the infection following a standard course of medication.
Why it matters
This case highlights the importance of vigilance regarding toddlers, who frequently place insects in their mouths, and the value of stool monitoring via diapers in detecting unusual health events. While rare in the U.S., these infections underscore how household environments can occasionally harbor unexpected medical risks.
The child received three doses of pyrantel pamoate at 11 mg/kg, administered two weeks apart. A follow-up stool test performed two weeks after the final dose confirmed the parasite had been successfully eliminated.
The players
Sallie Lin
A researcher and co-author of the 2025 case report detailing pediatric parasitic infections.
Jackie Otero
An author of the clinical study investigating the transmission of M. moniliformis.
Alexandra Stern
A contributor to the medical analysis of toddler parasite exposure.
Stephanie Kirkconnell
A co-author of the BMJ Case Reports document examining the rare worm infection.
The details
The parasite Moniliformis moniliformis typically lives in the intestines of rodents, where insects like cockroaches can ingest the worm eggs. Once a child swallows an infected insect, the larvae develop within the human digestive system. Because toddlers often explore their environment orally, caregivers are encouraged to remain aware of potential insect ingestion, as diapers often provide the first opportunity to spot unusual findings in a child's stool.
Timeline
1989: Last U.S. case reported in Pensacola.
2007: Case reported in an Iranian child.
2011: Report published regarding two Florida toddlers.
2021: Review published in Journal of Clinical Microbiology.
February 2025: Case report published in BMJ Case Reports.
The Home Front
This case follows the clinical pattern established by the 2011 report on Florida toddler parasitic infections, updating the historical record for pediatric infectious disease. These rare occurrences serve as a reminder of the intersection between household hygiene and public health outcomes.
Caregivers should keep an eye on children during playtime to discourage the mouthing of insects. If you observe an accidental ingestion, contact your pediatrician and keep a log of any unusual symptoms or changes in stool to share during a consultation.
The takeaway
While this parasitic infection was successfully treated, the event highlights the necessity of supervising toddlers to prevent the ingestion of household pests. Caregivers should consult a pediatrician if they observe unusual physical findings in a child's stool after an insect encounter.
Further reading
For more information on monitoring young children and household safety, visit our Toddlers section.
Source note: This article includes information reported by Medical Daily.
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