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Patent Macracanthorhynchus ingens Infection in a 17-Month-Old Child, Ohio

Rebecca J Chancey1, Sarah G H Sapp1, Mark Fox1

  • 1Parasitic Diseases Branch, Division of Parasitic Diseases and Malaria, Center for Global Health, US Centers for Disease Control and Prevention, Atlanta, Georgia, USA.

Open Forum Infectious Diseases
|February 8, 2021
PubMed

Insights

Human infections with Macracanthorhynchus worms are rare. This case shows Macracanthorhynchus ingens can mature and reproduce in humans, unlike previously thought.

Area of Science:

  • Parasitology
  • Tropical Medicine
  • Human Health

Background:

  • Human infections with Macracanthorhynchus species are infrequently documented.
  • Existing data suggest limited parasite maturation in human hosts.

Purpose of the Study:

  • To report a case of human infection with Macracanthorhynchus ingens.
  • To evaluate the potential for Macracanthorhynchus species maturation in humans.

Main Methods:

  • Case report of a 17-month-old child.
  • Identification of parasite eggs and an adult worm.

Main Results:

  • An asymptomatic pediatric case of Macracanthorhynchus ingens infection is described.
  • The patient passed both eggs and an adult worm, confirming parasite reproduction.
  • Macracanthorhynchus ingens demonstrated successful maturation in a human host.

Conclusions:

  • Macracanthorhynchus ingens may possess a greater capacity for maturation and reproduction in humans compared to Macracanthorhynchus hirudinaceus.
  • This case expands the understanding of Macracanthorhynchus infections in humans.
Keywords:
Macracanthorhynchus spphelminthparasite

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