Korean J Parasitol.  2011 Mar;49(1):51-57. 10.3347/kjp.2011.49.1.51.

Gastrointestinal Myiasis by Larvae of Sarcophaga sp. and Oestrus sp. in Egypt: Report of Cases, and Endoscopical and Morphological Studies

• Ahmad AK
• Abdel-Hafeez EH
• Makhloof M
• Abdel-Raheem EM

• KMID: 1715633
• DOI: http://doi.org/10.3347/kjp.2011.49.1.51

Abstract

Four cases of gastric or intestinal myiasis are reported. The cases contain 2 males (1 child 10 years old, and 1 adult 40 years old) and 2 females (1 girl 18 years old, and 1 adult 50 years old) from Minia Governorate, Southern Egypt. Three of them, including cases no. 1, 3, and 4, were gastric myiasis, and complained of offensive hematemesis of bright red blood. Minute moving worms, larvae of the fly, were found in the vomitus. On the other hand, case no. 2 had intestinal myiasis, and complained of abdominal distention, nausea, vomiting, and diarrhea. The stool of case 2 was mixed with blood, and minute moving worms were observed in the stool. Endoscopy was performed to explore any pathological changes in the stomach of the patients. The larvae were collected and studied macroscopically, microscopically, and us-ing a scanning electron microscope (SEM) to identify their species. Three different types of larvae were identified. The larvae isolated from case 1 were diagnosed as the second stage larvae of Sarcophaga species, and the larvae isolated from case 2 were the third stage larvae of Sarcophaga species. On the other hand, the larvae isolated from cases 3 and 4 were diagnosed as the third stage larvae of Oestrus species.

Keyword

Sarcophaga; Oestrus; gastric myiasis; intestinal myiasis; fly larva; SEM; endoscopy

MeSH Terms

Adolescent
Adult
Animals
Child
Diptera/anatomy & histology/growth & development/*physiology
Egypt
Endoscopes, Gastrointestinal
Female
Gastrointestinal Diseases/diagnosis/*parasitology
Humans
Larva/anatomy & histology/growth & development/physiology
Male
Middle Aged
Myiasis/diagnosis/*parasitology
Sarcophagidae/anatomy & histology/growth & development/*physiology