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Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...

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Protocol for Plasmodium falciparum Infections in Mosquitoes and Infection Phenotype Determination
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Genetic polymorphisms influence Plasmodium ovale PCR detection accuracy.

A Calderaro1, G Piccolo, F Perandin

  • 1Faculty of Medicine and Surgery, University of Parma, Department of Pathology and Laboratory Medicine, Section of Microbiology, Viale A. Gramsci, 14-43100 Parma, Italy. adriana.calderaro@unipr.it

Journal of Clinical Microbiology
|March 16, 2007
PubMed
Summary

Nested PCR assays offer superior detection of Plasmodium ovale and Plasmodium malariae compared to real-time PCR. This study highlights the frequent relapses of Plasmodium ovale infections in returning travelers.

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Area of Science:

  • Medical diagnostics
  • Parasitology
  • Infectious diseases

Background:

  • Accurate detection of Plasmodium species is crucial for malaria diagnosis and treatment.
  • Real-time PCR assays are widely used but may have limitations in detecting certain species.
  • Plasmodium ovale relapses can complicate malaria management, especially in travelers returning from endemic areas.

Purpose of the Study:

  • To compare the diagnostic performance of a novel nested PCR assay against real-time PCR for Plasmodium ovale detection.
  • To evaluate the utility of nested PCR for detecting Plasmodium malariae.
  • To investigate the frequency of Plasmodium ovale relapses in patients returning to Italy.

Main Methods:

  • Development and application of a novel nested PCR assay using specific Plasmodium ovale primers.
  • Comparison of nested PCR results with those obtained from real-time PCR assays.
  • Analysis of patient admission data to determine the timing of Plasmodium ovale detection relative to return from endemic regions.

Main Results:

  • The nested PCR assay demonstrated superior sensitivity for detecting Plasmodium ovale compared to real-time PCR.
  • Nested PCR also showed improved performance in detecting Plasmodium malariae.
  • A significant number of Plasmodium ovale cases were detected more than two months after patients returned to Italy, suggesting common relapses.

Conclusions:

  • A novel nested PCR assay provides enhanced detection capabilities for Plasmodium ovale and Plasmodium malariae.
  • The findings underscore the importance of considering relapsing Plasmodium ovale infections in travelers returning from malaria-endemic areas.
  • Nested PCR should be considered as a valuable tool for accurate malaria diagnosis, particularly for challenging cases involving Plasmodium ovale and Plasmodium malariae.