Onchocerciasis

Onchocerciasis is a parasitic disease spread by blackflies near fast-flowing rivers, mainly affecting sub-Saharan Africa & parts of South America. Read more about Onchocerciasis, Meaning, Treatment, Symptoms, Latest News

Onchocerciasis
Table of Contents

Onchocerciasis Latest News

Niger becomes the first country in the African Region to eliminate onchocerciasis.

About Onchocerciasis

  • Onchocerciasis, or river blindness, is a disease caused by Onchocerca volvulus, a parasitic worm. 
  • The parasite can spread to humans through repeated bites of infected blackflies of the Simulium species. 
  • The flies breed by fast-flowing rivers and streams in certain remote, tropical, agricultural areas.
  • Onchocerciasis itself isn’t contagious because it can’t spread directly from one person to another. 
  • But the disease can spread when blackflies bite infected people, ingest the larvae, and then bite people who aren’t infected.
  • It is common throughout sub-Saharan Africa and certain areas of Brazil and Venezuela in South America. 
  • Symptoms include a potentially disfiguring skin rash and vision problems, even blindness.
  • Globally, it is second only to trachoma in causing infection-related blindness.
  • According to the World Health Organization (WHO), river blindness remains one of the most neglected tropical diseases, especially in remote and rural areas.
  • Treatment: Treatment for river blindness is ivermectin, an oral antiparasitic medication.

Source: NOA

Update Icon
Latest UPSC Exam 2026 Updates

Date IconLast updated on August, 2026

UPSC Mains 2026 will be conducted on 21st, 22nd, 23rd, 29th and 30th August 2026.

→ Check out the latest UPSC Syllabus 2026 here.

UPSC Mains Admit Card 2026 is expected to be released in early August at upsc.gov.in or upsconline.nic.in

→ Enroll in Vajiram & Ravi’s UPSC Mains Test Series 2027 for structured answer writing practice, expert evaluation, and exam-oriented feedback.

→ Join Vajiram & Ravi’s UPSC Mentorship Program 2027 for personalized guidance, strategy planning, and one-to-one support from experienced mentors.

→ Go through the UPSC Mains Previous Year Papers to enhance your preparation.

→ Download UPSC Mains Essay Paper 2025, UPSC Mains GS Paper-I 2025, UPSC Mains GS Paper-II 2025, UPSC Mains GS Paper-III 2025, UPSC Mains GS Paper-IV 2025, UPSC Mains English (Compulsory) Paper 2025, UPSC Mains Hindi (Qualifying) Paper 2025 here.

→ UPSC has released UPSC Toppers List 2025 with the Civil Services final result on its official website.

UPSC Calendar 2027 has been released.

→ Also check Best UPSC Coaching in India

Onchocerciasis FAQs

Q1. Onchocerciasis is caused by which organism?+

Q2. How is Onchocerciasis transmitted to humans?+

Q3. Which regions of the world are most affected by Onchocerciasis?+

Q4. What is the primary treatment for Onchocerciasis?+

Tags: onchocerciasis prelims pointers upsc current affairs upsc prelims current affairs

UPSC GS Course 2026
UPSC GS Course 2026
₹1,80,000
Enroll Now
GS Foundation Course 2 Yrs
GS Foundation Course 2 Yrs
₹2,45,000
Enroll Now
UPSC Mentorship Program
UPSC Mentorship Program
₹85000
Enroll Now
UPSC Sureshot Mains Test Series
UPSC Sureshot Mains Test Series
₹29500
Enroll Now
Prelims Powerup Test Series
Prelims Powerup Test Series
₹14000
Enroll Now
Enquire Now