Parish health officials report spike in West Nile detections; urge targeted spraying and precautions

Parish mosquito‑control officials told the Saint Martin Parish Public Works Committee on Sept. 16 that they are facing a markedly elevated West Nile detection season and are working with targeted zone‑based spraying and weekly testing to avert human disease.

The parish’s vector‑control representative said, “We have 35 human cases that is documented. No deaths at this time, but we'd like to keep it that way in Saint Martin Parish,” and described the program’s approach of deploying traps, confirming positives through an independent lab and conducting three nights of targeted spraying followed by retesting.

Why it matters: Officials said the parish is seeing concentrated mosquito pools that test positive for West Nile virus and that those pools often remain within a roughly one‑mile radius; that concentration raises the chance of local human infections if not contained quickly. Parish staff emphasized that the vector that is testing positive feeds on infected birds, which then sustain local transmission.

What officials are doing: The parish tests weekly (samples are analyzed by LSU), runs different trap types including white traps and a ‘rabbit’ trap aimed at the southern house mosquito (the primary West Nile vector), and deploys insecticide in defined zones — typically three nights of spraying and then a pause to retest. The presenter described the insecticide as a contact agent targeted at mosquitoes and said it is chosen to avoid harming beneficial insects.

Public guidance: Officials urged residents to drain standing water, wear EPA‑approved insect repellents, avoid peak mosquito activity at dusk and dawn, and protect vulnerable household members. The parish uses a tiered advisory system: Level 3 is an initial warning; Level 4 follows a confirmed human case and triggers seven days of intensified spraying and testing; Level 5 indicates multiple human cases and is defined as a worst‑case scenario to be avoided.

Next steps: Vector staff said they will continue the weekly testing cadence, notify the administration when human cases are identified to trigger targeted response, and expand public outreach. No parish‑level hospitalization or death from West Nile was reported in the meeting excerpts. The parish encouraged council members to relay prevention messages to their constituents and to prioritize protection at public venues such as football fields where people gather at dusk and dawn.

The committee did not record a formal vote on new mosquito resources in the provided transcript excerpt; officials said they would continue to monitor traps and test results and update the council as needed.