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Case Reports
. 2018 Jan;98(1):150-153.
doi: 10.4269/ajtmh.16-0437. Epub 2018 Jan 1.

Case Report: Myiasis due to Cochliomyia hominivorax and Dermatobia hominis: Clinical and Pathological Differences between Two Species in Northern Peru

Virgilio E Failoc-Rojas  1   2   3 , Carolina Molina-Ayasta  3 , Jaime Salazar-Zuloeta  2 , Abel Samamé  4 , Heber Silva-Díaz  1
Affiliations
Case Reports

Case Report: Myiasis due to Cochliomyia hominivorax and Dermatobia hominis: Clinical and Pathological Differences between Two Species in Northern Peru

Virgilio E Failoc-Rojas et al. Am J Trop Med Hyg. 2018 Jan.

Abstract

Infestations caused by fly larvae (Myiasis) have been observed in patients with risk factors and in tropical zones. The aim of our study was to describe the clinical and epidemiological aspects and the risk factors associated with the occurrence of obligatory myiasis, as well as the therapeutic approach to patients. We identified the cases of myiasis diagnosed in two referral hospitals in northern Peru from January 2012 to December 2015 and included patients in whom larval development and a compatible clinical profile were observed. Epidemiological, clinical, analytical, diagnostic, therapeutic, and follow-up data were collected from clinical files. Nine clinical cases were compatible with a diagnosis of myiasis; of these, two were pediatric patients, one was a middle-aged adult, and six were elderly patients. Four of the nine patients were male. The identified species were Dermatobia hominis and Cochliomyia hominivorax. The therapeutic approach included antiparasitic therapy with ivermectin, antibacterial, and in some cases, anti-inflammatory drugs. Dermatobia hominis and C. hominivorax are the predominant species causing myiasis in northern Peru.

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Figures

Figure 1.
Figure 1.
Top: Third-instar larva of Cochliomyia hominivorax: (A) Dorsal view showing the pigmented dorsal tracheal trunks, visible in the last four body segments; (B) Posterior spiracles with three straight grooves on each and open peritremes; (C) Segments with bands of small cuticular spines. Bottom: Third-instar larva of Dermatobia hominis. (D) Dorsal view showing a narrow rear end without cuticular spines in the last three segments; (E) Posterior spiracles with three straight grooves on each and peritremes; (F) Segments with rows of prominent cuticular spines. This figure appears in color at www.ajtmh.org.
Figure 2.
Figure 2.
Cycle according to the type of myiasis: Cochliomyia hominivorax and Dermatobia hominis. This figure appears in color at www.ajtmh.org.
See this image and copyright information in PMC

References

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