The parasite in the Sea of Galilee strikes again: two bathers diagnosed with corneal damage

A tiny parasite capable of damaging vision: two cases of corneal damage were diagnosed this past week in individuals who swam in the Sea of Galilee. The Ministry of Health reported this evening that the damage is linked to microsporidia, a microscopic parasite that can cause severe eye inflammation, pain, blurred vision, and corneal injury. The ministry clarifies that there is no risk in drinking water from the Sea of Galilee and that swimming remains permitted, but urges the public to be alert to symptoms that may develop with a delay.

According to the data provided, one patient swam in the lake at the end of June, while the second did so in early July. In both cases, symptoms did not appear immediately but surfaced after a relatively long period. The Ministry of Health stated that symptoms can develop between one and three weeks after exposure, which may lead bathers to overlook the connection between their eye discomfort and their visit to the lake.

Microsporidia is a microscopic parasite that can penetrate the outer layer of the eye, causing inflammation of the cornea—the transparent tissue essential for focusing light. Damage to the cornea can lead to pain, light sensitivity, tearing, redness, and blurred vision. Patients often report a persistent sensation of a foreign body, such as a grain of sand or an eyelash, that remains even after rinsing the eye.

The Ministry of Health urges anyone who has swum in the Sea of Galilee in recent weeks and is experiencing eye inflammation, redness, pain, or a foreign body sensation to see an ophthalmologist as soon as possible. Professional examination is crucial, especially if symptoms persist, worsen, or are accompanied by a decrease in visual acuity, as specialized equipment is required for an accurate diagnosis.

Because symptoms may appear long after the actual swim, patients often mistake them for common eye infections, allergies, or dryness. It is vital to inform your doctor of any recent visits to the Sea of Galilee within the last three weeks during your examination.

Despite these reports, the Ministry of Health emphasizes that there is currently no instruction to avoid swimming in the Sea of Galilee. The ministry reiterated that drinking water from the lake is safe, as it undergoes rigorous treatment and control processes; the incidents reported involve direct contact of lake water with the eyes during swimming or diving.

As the summer season reaches its peak, thousands of vacationers are visiting the shores of the lake. Exposure often occurs during swimming, diving, or sports activities, where water may enter the eyes with force. Even after leaving the water, contaminants can remain on the eyelids and eyelashes.

In cases of mild, transient stinging, eyes may be rinsed with clean water, but rubbing should be avoided. However, persistent pain, significant redness, light sensitivity, discharge, or vision loss require medical attention. The use of over-the-counter or prescription eye drops without professional guidance can blur the clinical picture and delay proper treatment. The public is advised to follow Ministry of Health announcements and seek medical advice if suspicious symptoms arise, even weeks after visiting the lake.