Suspected Organophosphate Poisoning in a Mixer/Loader

The two diagnoses overlap in some signs but diverge in the decisive ones.

Consistent with heat alone: headache, sweating, weakness, cramps.

Not explained by heat: increased salivation, blurred vision (miosis), and the combination of cramps with excess secretions. Heat stroke classically gives hot, dry skin and confusion; heat exhaustion gives heavy sweating but not salivation or pinpoint pupils. This cluster - headache, miosis, sweating, salivation, GI cramps - is a cholinergic picture matching organophosphate exposure, and Marcus has a documented dermal exposure route.

Immediate actions, in order:

1. Stop work and move him out of the treated/mixing area to fresh air; do not let him return to the mixing pad.
2. Remove contaminated clothing and wash skin with soap and water - decontaminate before transport, because the exposure continues on the skin.
3. Call 911 or Poison Control and send the product label with him; the label carries the treatment statement and the active ingredient.
4. Notify the supervisor and begin the exposure investigation (torn glove, forearm splash).
5. Do not give anything by mouth to a symptomatic, salivating patient, and never attempt to treat him with farm-supply atropine.

Treating this as heat and handing him water delays the one intervention that matters: removing the exposure and getting medical care.

For organophosphates, dermal absorption is a major route - often the dominant route for mixers and loaders. The respirator protects the lungs; it does nothing for a forearm running with concentrate.

Key points:

• A torn glove is worse than no glove: concentrate pools inside and is held against skin under occlusion, so the absorbed dose rises sharply.
• The forearm splash happened at the moment of highest concentration - pouring from a jug - which is exactly why the label requires chemical-resistant gloves plus long sleeves for mixing and loading.
• Heat is a compliance risk, not an excuse. At 94°F a disposable coverall becomes unbearable, workers remove sleeves, and gloves tear. That is a management failure: provide the correct PPE, spare gloves at the pad, a change-out schedule, shade, water, and rest breaks.
• Single-use nitrile is fine for many formulations but must be replaced when torn or after the contact time; leather and cloth are never acceptable around concentrates.

The program fix: pre-shift PPE check, spare gloves stocked at the mixing station, closed mixing/induction system to eliminate pouring, a decontamination station, and documented training on the label's PPE section.

REI. The 24-hour interval runs from the end of the application. Scouting at 5 p.m. is inside the interval and is prohibited unless he uses the label's early-entry PPE requirements. After a suspected poisoning, he should not enter on early-entry terms at all - the medical follow-up comes first.

Cholinesterase baseline. Baseline testing is only useful if it was done before exposure, and a January value serves that purpose:

• A repeat test now, compared to baseline, gives the physician an objective measure. A substantial drop from a worker's own baseline, read alongside the cholinergic signs, supports the diagnosis and guides return-to-work.
• The comparison matters more than any single number, which is why the employer should have been tracking periodic values, not just the one.
• A diagnosed case is recordable and reportable through the employer's incident process, and the physician - not the applicator or the crew leader - clears him for return to pesticide work and for handling organophosphates again.

Operational fallout: re-examine every application this crew made in the past two weeks, verify PPE availability, and check whether the closed-mixing equipment was bypassed.