Ocular onchocerciases is a disease caused by the parasitic worm Onchocerca volvulus. The spelling of this word can be challenging, but it can be broken down using the International Phonetic Alphabet (IPA) phonetic transcription. The first part, "ocular," is pronounced /ˈɒkjʊlə/, with stress on the first syllable. "Onchocerciases" is pronounced /ˌɒŋkəʊsɜːrsaɪəsiːz/, with stress on the third and sixth syllables. The multiple syllables and unusual spelling of "onchocerciases" can make it difficult to spell, but with practice, it can become more familiar.
Ocular onchocerciases is a medical condition primarily caused by a parasitic infection known as Onchocerca volvulus, commonly known as river blindness. This condition specifically refers to the manifestation of Onchocerca volvulus infection in the eyes, resulting in various ocular symptoms and abnormalities.
The parasitic infection is transmitted through the bite of infected black flies found in specific regions, particularly in sub-Saharan Africa and parts of Central and South America. The flies serve as vectors, introducing the microscopic larvae of Onchocerca volvulus into the human body upon biting. The larvae mature in the body, eventually forming adult worms that commonly reside in the subcutaneous tissues.
In ocular onchocerciases, the presence of adult worms in the eye tissues leads to inflammation and damage. Common symptoms of this condition include intense itching and irritation in the eyes, as well as redness, swelling, and increased tear production. Furthermore, it may lead to the development of various visual impairments such as blurred vision, visual field defects, and eventually, irreversible blindness if left untreated.
Diagnosis of ocular onchocerciases involves the identification of characteristic signs and symptoms, along with the detection of microfilariae (the larvae) in skin snips or other affected tissues. Treatment typically involves the administration of antiparasitic drugs such as ivermectin and suramin, which aim to kill and eliminate the adult worms from the body. Preventive measures such as vector control and mass drug administration programs play a crucial role in preventing the spread and impact of ocular onchocerciases.
The word "ocular onchocerciases" is a medical term related to a disease called "onchocerciasis" or "river blindness", which is caused by the parasitic worm Onchocerca volvulus. The term "ocular" refers to the involvement of the eyes in this disease.
The word "onchocerciasis" itself has Greek origins. It can be broken down into two parts:
1. "Oncho-" comes from the Greek term "onkos", meaning "a swelling" or "a mass".
2. "-Cerciasis" is derived from "kirkos", which means "a circle" or "a ring".
Therefore, "onchocerciasis" can be understood as a disease characterized by the presence of swollen or inflamed areas caused by the parasite.