Parasitology Case 4
Presented By Dr Tarek Mesbah F. Mohammed
Released on 23-10-2019Patient Data
Male Patient 45 years From Asiut
Clinical Data
Came to Ophthalmology Clinic with Redness , Hard itching , discharge,swollen conjunctiva and Black spots
Related Laboratory Results
1- Conjunctival Swab
2- Direct smear on slide with one saline drop and Examined under microscope
Case Picture(s) / Photo(s)
Comment / Findings
Ophthalmomyiasis by Oestrus Ovis Larva
Final Diagnosis
Ophthalmomyiasis by Oestrus Ovis Larva . Myiasis due to Oestrus ovis is a well-known zoonotic disease that affects a variety of animals. Human myiasis affects mainly individuals in rural areas such as shepherds and farmers.
Additional Note
There are two main types of myiasis:
1- External myiasis includes cutaneous myiasis which is more common than ocular and aural myiasis.
2-Internal myiasis includes gastric, intestinal and urogenital infestation.
Conjunctival myiasis is the most frequent expression of ocular myiasis. Ocular myiasis is clinically divided into:
1-External ophthalmomyiasis in which the infestation is restricted to the conjunctiva
2-Internal ophthalmomyiasis which affects the choroid and retina.
The severity of myiasis depends on the location of the infestation:
1-external ophthalmomyiasis :benign and self limiting
2-Internal ophthalmomyiasis (caused byHypoderma): iridocyclitis, endophthalmitis or loss of vision.
Treatment:
1-Removal of Larva one by one
2-Ivermectin (Iverzin) 150 uG/Kg body wt. once.
3-Betadine drops
4-antibiotic drops