Pharyngeal Myiasis Caused by Sheep Botfly, Oestrus ovis (Diptera: Oestridae) Larva, Tabriz, East Azarbaijan Province, Iran: A Case Report

  • Teimour Hazratian Mail Departement of Parasitology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
  • Ali Tagizadeh Departement of Emergency Medicine, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
  • Mohammad Chaichi Departement of Infectious and Tropical Diseases, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
  • Madineh Abbasi Departement of Parasitology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
Myiasis, Pharyngeal myiasis, Oestrus ovis, Iran


Myiasis is caused by the larvae of flies infesting animal or human tissues and organs. This report aims to present a case of pharyngeal myiasis caused by the larvae of Oestrus ovis (Diptera: Oestridae). A 55-yr old drug addict living in the Shahindeje village of Western Azerbaijan Province, northwestern Iran was referred to the Emam Reza Hospi­tal in Tabriz, having a medical history of Chronic Obstructive Pulmonary Disease (COPD) and hospitalized due to respiratory distress, 20 days ago. He was intubated with a mechanical ventilator (MV) because of his respiratory distress condition. There was an evidence of the presence of pulmonary nodules in his lungs following diagnosis, and a CT scan revealed a cavity in his lung. During the nasogastric intubation procedure, a larva was seen emerging from the patient’s mouth by one of the staff of the intensive care unit of the hospital. A laboratory diagnosis was per­formed in the Entomology Department of the School of Medicine, Tabriz University of Medical Sciences. Interest­ingly, larvae of O. ovis were identified and confirmed following the laboratory proceedings.


Akbarzadeh K (2012) Estimation of geographi-cal distribution, biodiversity and species richness of myiasis inducing flies in Fars Province. Tehran University of Medical Sciences, School of Public Health, Teh- ran, Iran.

Alizadeh M, Mowlavi Gh, Kargar F, Nategh- pour M, Akbarzadeh K, Hajenorouzali M (2014) A review of myiasis in Iran and a new nosocomial case from Teh- ran. Iran J Arthropod-Borne Dis. 2(2):124–131.

Amendt J, Lee Goff M, Campobasso Cp, Grassberger M (2010) Current concepts in forensic Entomology. Springer, Dor- drecht. Chapt 16. p. 355.

Bhatt AP, Jayakrishnan A (2000) Oral myia- sis: a case report. Int J Paediatr Dent.10(1): 67–70.

Capelle, Kenneth J (1966) The Occurrence of Oestrus ovis L. in the Bighorn Sheep from Wyoming and Montana. J Parasitol. 52(3): 618–621.

Gregory AR, Schatz S, Lambaugh H (2004)Ophthalmomyiasis caused by the sheep bot fly, Oestrus ovis, in northern Iraq. Opt and VS. 81(8): 586–90.

Hakimi R, Yazdi I (2002) Oral mucosa my-iasis caused by Oestrus ovis. Arch Iran Med. 5(3): 194–196.

Jdalayer T, Maleki M, Moghtader M (1978) Human urogenital myiasis cause by Chrysomyia bezziana. Iran J Public Health. 7(3): 116–118.

Janbakhsh B, Pirous MS, Tirgari S, Aghamo- hamadi A (1977) A case of ophthal- momyiasis in man by Oestrus ovis in Tehran (Diptera: Oestridae). Acta Med Iran. 20: 19–26.

Joo CY, Kim JB (2001) Nosocomial subman- dibular infections with dipterous fly lar- vae. Korean J Parasitol. 39(3): 255–260.

Karimi GH, Vahidi MR (1999) A case report of pharyngeal myiasis. J SSUMS. 1(7):91–94.

Khalili B, Ebrahimi M, Khoobdel M (2007) A case of intestinal myiasis due to Sarcophaga hemorrhoidalis from Cha- har Mahal and Bakhtiari Province. J Shahrkord Univ Med Sci. 9(2): 85–88. Khataminia GH, Elyasi P (1999) Advanced orbital myiasis: Acase report in Sina Hos-

pital, Ahwaz. SJEB of Iran. 1(5): 59–61. Lane RP, Crosskey RW (1996) House -fly,blow-flies, and their allies (Calyptrate Diptera). In: Lane RP, Crosskey RW (1996) Medical insects and arachnids. London. Chapman and Hall. Text Book, pp. 429–469.

Langan SM, Dervan P, Loughlins O (2004) A moving scalp nodule in a returning travel. Br J Dermatol. 151(6): 1266–1269.

Mandell GL, Bnnett JE, Dolin R (2010) Prin- ciples and Practice of Infectious Dis- eases. Vol. 2. Elsevier Churchill Living- ston, Philadelphia.

Masoodi M, Hosseini K (2004) External oph- thalmomyiasis caused by sheep botfly (Oestrus ovis) larva. Arch Iran Med. 7 (2): 136–139.

Mowlavi Gh, Nateghpour M, Teimoori S, Amin A, Noohi F, Kargar F (2011) Fatal nosocomial myiasis caused by Lucilia sericata . J Hosp Infect. 78: 335–339.

Najjari M, Shafiei R, Fakoorziba MR (2014) Nosocomial myiasis with Lucilia seri- cata (Diptera: Calliphoridae) in an ICU patient in Mashhad, Northeastern of Iran. Arch Iran Med. 17(7): 523–525.

Pampiglione S, Gianetto S, Virga A (1997) Persistence of human myiasis by oes- trus ovis L. among shepherds of the Etnean area (Sicily) for over 150 years, Dipartimento di Sanitá Publica Veteri- naria e Patologia Animale, Univ. di Bo- logna, Italy. 39(4): 415–418.

Pinto C, Vairo K, de Mello-Patiu CA, deCavalho CJB (2011) Pictorial identify cation key for species of Sarcophagidae (Diptera) of potential forensic importance in southern Brazil. Rev Bras Entomol.55(3): 333–347.

Reuler JB, Girard DE, Cooney TG (1985) Cur- rent concepts. Wernicke's encephalopa- thy. N Engl J Med. 312(16): 1035–1039.

Salimi M, Goodarzi D, Karimfar MH, Edalat H (2010) Human urogenital myiasis caused by Lucilia sericata (Diptera: Calliphoridae) and Wohlfahrtia mag- nifica (Diptera: Sarcophagidae) in Marka- zi Province of Iran. Iran J Arthropod- Borne Dis. 4(1): 72–76.

Sharma J, Panchakarappa G, Acharya R (2008) Primary oral myiasis. Med Oral Patol Oral Cir Bucal. 1(11): 714–716.

Shinohara EH, Martini MZ, Oliveira Neto HG, Takahashi A (2004) Oral myiasis treated with Ivermectin. Braz Dent J.15(1): 79–81.

Talari Sa, Yeganeh Moghadam A, Dehghani R (2002) Chryzomya bezziana infesta- tion. Arch Irn Med. 5(1): 56–58.

Tirgari S, Khalkhali K, Aghamohamadi A (1977) First case of auricular myiasis due to Sarcophaga haemorrhoidalis (Dip- tera: Sarcophagidae). Ent Mon Mag. 112:255–256.

Verstrynge K, Foets B (2004) External oph- thalmomyiasis. Bull Soc Belge Oph- thalmol. 294: 67–71.

Yaghoobi R, Tirgari S, Sina N (2005) Human auricular myiasis caused by Lucilia seri- cata: clinical and parasitological consid- erations. Acta Med Iran. 43: 155–157.

Youssefi MR, Rahimi Mt, Mahaba Z (2012) Occurrence of nasal nosocomial myia- sis by Lucilia sericata (Diptera: Calli- phoridae) in north of Iran. J Parasitol.7(1): 104–108.

How to Cite
Hazratian T, Tagizadeh A, Chaichi M, Abbasi M. Pharyngeal Myiasis Caused by Sheep Botfly, Oestrus ovis (Diptera: Oestridae) Larva, Tabriz, East Azarbaijan Province, Iran: A Case Report. J Arthropod Borne Dis. 11(1):166-170.
Case Report