Parasitology Case 4

Male Patient 45 years From Asiut

1- Conjunctival Swab

2- Direct smear on slide with one saline drop and Examined under microscope

Ophthalmomyiasis by Oestrus Ovis Larva

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