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A recent diagnosis of an 18-year-old with an Acanthamoeba infection in Thiruvananthapuram, Kerala, has spotlighted a concerning surge in cases of this rare but severe amoebic infection in the state. Preliminary investigations linked the patient’s illness to exposure at a public pool, specifically the Akkulam Tourism Village pool, underscoring public health risks associated with contaminated water sources. This case comes amid a broader outbreak that has seen multiple infections, including fatal cases, reported across Kerala in 2025.
Key Developments and Regional Context
Kerala’s health authorities have confirmed multiple cases of Acanthamoeba infections in 2025, with 66 cases and 17 deaths reported statewide so far this year. The infection, often associated with amoebic meningoencephalitis or keratitis, has been detected in both water and air samples, raising concerns about environmental transmission beyond traditional stagnant water sources. Of particular note are clusters in districts such as Thiruvananthapuram, Malappuram, Kozhikode, and Wayanad, where public awareness and preventive measures are increasingly critical.
Dr. K.J. Reena, Health Department Director, explained that while inhaling air containing amoebae alone may not cause infection, the combination of airborne amoebae with water exposure—such as during bathing or swimming—facilitates transmission. This understanding builds on earlier assumptions that stagnant water alone was the main reservoir. Additionally, contamination of tap water with pathogenic amoebae has been highlighted as a risk factor, especially where water treatment and chlorination are inadequate.
Expert Insights and Medical Perspectives
Acanthamoeba is a free-living amoeba globally prevalent in water, soil, and air, capable of causing severe infections like Acanthamoeba keratitis (an eye infection) and granulomatous amoebic encephalitis (GAE), a rare but often fatal brain infection. Dr. Abdul Rauf, pediatric intensivist at Baby Memorial Hospital in Kozhikode, noted that newer cases sometimes have delayed symptom onset, reflecting the diverse clinical presentations dependent on the infecting species (including Acanthamoeba and Balamuthia mandrillaris). He also emphasized environmental factors such as climate change and poor sanitation that increase risks by creating favorable conditions for amoebae proliferation.
Treatment remains challenging due to the organism’s cyst form, which is resistant to many drugs. Current recommended therapies for Acanthamoeba keratitis involve prolonged use of anti-amoebic agents such as polyhexamethylene biguanide (PHMB) and diamidines, with therapy lasting months to ensure eradication. Research is ongoing into novel treatments, including nanomedicine approaches, as the infection can lead to serious outcomes including blindness or death if not promptly managed. Steroids, while sometimes used, require cautious administration due to potential suppression of immune response worsening the infection.
Public Health Implications
The recent surge in cases, including fatalities, has prompted public health warnings in Kerala. Officials emphasize the importance of avoiding swimming in untreated or poorly maintained water bodies, ensuring safe drinking water, and maintaining personal hygiene practices to reduce exposure. Given the amoeba’s detection in air and water, the Kerala government is urged to strengthen environmental surveillance, water quality control, and public awareness campaigns.
The situation has also raised broader concerns about environmental management, sanitation infrastructure, and the impact of climate variability. Experts call for coordinated data collection, faster access to specialized anti-amoebic medications (which are often imported), and research into why these infections are becoming more frequent in the region. The lessons from Kerala could inform global efforts to address free-living amoebic infections that remain neglected yet carry high morbidity and mortality.
Limitations and Counterpoints
While awareness is increasing, some scientific uncertainties persist. The precise routes and likelihood of airborne transmission remain under investigation. The correlation between environmental Acanthamoeba presence and human infection does not always confirm causation, necessitating ongoing epidemiological studies. Moreover, delayed onset and varied clinical manifestations challenge timely diagnosis, underscoring the need for enhanced diagnostic capabilities and clinician awareness in endemic areas.
Practical Guidance for the Public
For the general public, the key is vigilance in avoiding exposure to potentially contaminated water sources. Using safe, chlorinated water for bathing and drinking, refraining from swimming in unmonitored pools or natural water bodies, and seeking medical attention promptly if infections or ocular symptoms arise are prudent measures. Eye care professionals stress the importance of proper contact lens hygiene to prevent Acanthamoeba keratitis, particularly for lens users.clevelandclinic+1
Medical Disclaimer
This article is for informational purposes only and should not be considered medical advice. Always consult with qualified healthcare professionals before making any health-related decisions or changes to your treatment plan. The information presented here is based on current research and expert opinions, which may evolve as new evidence emerges.
References
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“18-year-old diagnosed with acanthamoeba infection in Thiruvananthapuram,” The News Minute, September 13, 2025.
