שאלה משלב א׳ בבריאות הציבור · מועד 2025, שאלה 125

Correct: D — instruct the local authority to take immediate corrective action. A count of 200 faecal enterococci in bathing water is a substantial exceedance of the standard, and enterococci are themselves the primary indicator organism for marine bathing water, so no further confirmation is required before acting: the local authority must investigate the source — a sewage leak, a stream discharge, a storm overflow — and the beach is closed to bathers while the hazard persists. Re-sampling the same beach or sampling neighbouring ones (options A and B) may follow but must not delay protection of bathers, and waiting for a faecal coliform result (option C) adds nothing, enterococci being the more reliable indicator in salt water.