Experts Push to Classify Ocular Toxoplasmosis as Neglected Tropical Disease

Experts are calling for ocular toxoplasmosis to be recognized as a neglected tropical disease (NTD), citing its widespread impact and underfunded research, according to a 2023 statement from the International Society for Infectious Diseases. The condition, caused by the parasite Toxoplasma gondii, affects an estimated 3 billion people globally, though precise prevalence data remains contested, according to the World Health Organization (WHO).

What Is Ocular Toxoplasmosis and How Does It Spread?

Ocular toxoplasmosis is a parasitic infection that targets the eyes, often leading to vision loss or blindness if untreated. The parasite Toxoplasma gondii infects humans through contact with contaminated cat feces, undercooked meat, or contaminated water, per the Centers for Disease Control and Prevention (CDC). While most infections are asymptomatic, the parasite can reactivate in immunocompromised individuals, causing severe ocular damage.

“This isn’t just a rare disease—it’s a global health issue with significant long-term consequences,” said Dr. Maria Lopez, a parasitologist at the University of California, San Francisco, in a 2023 interview. “Yet it remains overlooked in public health frameworks.”

Why Are Experts Advocating for NTD Status?

The WHO classifies NTDs as conditions that disproportionately affect marginalized communities, often lacking targeted interventions. Ocular toxoplasmosis meets several criteria, including its prevalence in low-resource regions and limited access to diagnostic tools. A 2022 study in the *Journal of Infectious Diseases* found that the disease is most prevalent in sub-Saharan Africa, Latin America, and parts of Southeast Asia, where poverty and inadequate sanitation exacerbate transmission.

“Reclassifying it as an NTD could unlock funding for better diagnostics, treatment, and public education,” said Dr. James Carter, a public health researcher at the London School of Hygiene & Tropical Medicine. “Right now, it’s stuck in a gap between infectious disease programs and ophthalmology.”

Global Prevalence and Underreported Cases

Estimates of Toxoplasma gondii infection rates vary widely. The CDC states that 60-80 million people in the U.S. are infected, while a 2021 meta-analysis in *The Lancet Global Health* suggested 3 billion people worldwide are affected. However, the study’s authors noted that these numbers are likely underestimates, as many cases go undiagnosed or misdiagnosed.

“We’re seeing a disconnect between the scale of the problem and the resources allocated to it,” said Dr. Amina Diallo, a tropical medicine specialist in Senegal. “In our clinics, ocular toxoplasmosis is a leading cause of preventable blindness, yet it’s not prioritized in national health strategies.”

What’s Next for Policy and Treatment?

The push for NTD status comes as researchers develop new treatments. A 2023 clinical trial published in *Nature Medicine* tested a combination therapy targeting the parasite’s lifecycle, showing a 40% reduction in recurrent infections. However, access to existing medications like pyrimethamine and sulfadiazine remains limited in low-income countries due to cost and supply chain issues.

Advocates argue that NTD classification would pressure governments and organizations to invest in prevention campaigns, such as improving water sanitation and promoting pet ownership guidelines. “This is a disease we can control,” said Dr. Lopez. “But it requires a coordinated, global response.”

How Can Individuals Protect Themselves?

The CDC recommends the following precautions:

• Avoid contact with cat feces; wear gloves when cleaning litter boxes.
• Cook meat to safe temperatures and wash fruits/vegetables thoroughly.
• Use safe water sources, especially in regions with high infection rates.

For those with weakened immune systems, regular eye exams are critical to detect early signs of ocular toxoplasmosis.