# As US border reopens to Mexican cattle, concerns persist over screwworm spread | Reuters

> Reuters reports that the US has reopened its border to Mexican cattle, initially through Arizona with New Mexico ports to follow. Mexico opened a sterile fly plant in Chiapas, and a US plant is due by spring 2027. USDA counts 46 screwworm cases in Texas and New Mexico, with two active.

- Date: 2026-08-24 · published 2026-08-24T12:00:00.000Z
- Category: trade · region US · magnitude medium
- Page: https://feedsoft.ai/events/17844-as-us-border-reopens-to-mexican-cattle-concerns-persist-over-screwworm-spread
- Commodities: [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md), [Live Cattle](https://feedsoft.ai/c/LCATTLE.md)

## Why it matters

Added feeder cattle supply from Mexico is bearish for feeder and live cattle prices, but renewed screwworm risk could tighten supply or trigger further border restrictions.

## Read by commodity

- FCATTLE: bearish ▼
- LCATTLE: bearish ▼

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| FCATTLE | 2026-07-29 | [USDA Reopens Border to Mexican Cattle Amid Screwworm Fight](https://feedsoft.ai/events/18297-usda-reopens-border-to-mexican-cattle-amid-screwworm-fight.md) | +2.4% | -2.7% |
| FCATTLE | 2026-09-24 | [As screwworm fight continues, Mexican cattle ranchers ready for border reopening - El Paso Matters](https://feedsoft.ai/events/17419-as-screwworm-fight-continues-mexican-cattle-ranchers-ready-for-border-reopening.md) | -0.0% | +3.4% |
| FCATTLE | 2026-09-24 | [US eases screwworm ban on Mexican cattle, but beef prices unlikely to budge \| Reuters](https://feedsoft.ai/events/17418-us-eases-screwworm-ban-on-mexican-cattle-but-beef-prices-unlikely-to-budge.md) | -0.0% | +3.4% |
| FCATTLE | 2025-06-30 | [USDA announces phased reopening of Mexican cattle imports after screwworm closure \| Reuters](https://feedsoft.ai/events/24159-usda-announces-phased-reopening-of-mexican-cattle-imports-after-screwworm.md) | +1.9% | +8.3% |
| FCATTLE | 2026-07-27 | [U.S. to lift screwworm ban on Mexican cattle - TT](https://feedsoft.ai/events/18296-u-s-to-lift-screwworm-ban-on-mexican-cattle-tt.md) | +0.8% | -3.1% |
| LCATTLE | 2026-07-29 | [USDA Reopens Border to Mexican Cattle Amid Screwworm Fight](https://feedsoft.ai/events/18297-usda-reopens-border-to-mexican-cattle-amid-screwworm-fight.md) | +1.5% | -3.3% |
| LCATTLE | 2026-09-24 | [US eases screwworm ban on Mexican cattle, but beef prices unlikely to budge \| Reuters](https://feedsoft.ai/events/17418-us-eases-screwworm-ban-on-mexican-cattle-but-beef-prices-unlikely-to-budge.md) | -0.8% | +2.7% |
| LCATTLE | 2025-06-30 | [USDA announces phased reopening of Mexican cattle imports after screwworm closure \| Reuters](https://feedsoft.ai/events/24159-usda-announces-phased-reopening-of-mexican-cattle-imports-after-screwworm.md) | -3.1% | +1.7% |

## Sources

- reuters.com: https://www.reuters.com/world/americas/mexico-boosts-sterile-fly-dispersal-us-reopens-cattle-trade-2026-08-24/

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.