# Flesh-eating worm in Mexico is upending cross-border cattle trade

> The New World screwworm outbreak in Mexico has led to an almost year-long blockade on imported Mexican cattle. The halt has disrupted domestic feedlots and long-standing cross-border business relationships.

- Date: 2026-01-01 · published 2026-01-01T12:00:00.000Z
- Category: disease · region US · magnitude medium
- Page: https://feedsoft.ai/events/21453-flesh-eating-worm-in-mexico-is-upending-cross-border-cattle-trade
- Commodities: [Live Cattle](https://feedsoft.ai/c/LCATTLE.md), [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md)

## Why it matters

With Mexican feeder cattle excluded, US feeder supplies stay tight, which supports cattle prices and keeps feedlot input demand under pressure.

## Read by commodity

- FCATTLE: bullish ▲
- LCATTLE: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| LCATTLE | 2026-06-03 | [Flesh-eating screwworm confirmed in Texas calf as parasite crosses border from Mexico \| Reuters](https://feedsoft.ai/events/18763-flesh-eating-screwworm-confirmed-in-texas-calf-as-parasite-crosses-border-from.md) | +0.0% | -0.7% |
| LCATTLE | 2026-05-01 | [More Screwworm Cases in Mexico Threaten Cattle Trade With US](https://feedsoft.ai/events/19652-more-screwworm-cases-in-mexico-threaten-cattle-trade-with-us.md) | +0.1% | +1.1% |
| LCATTLE | 2025-07-10 | [US again halts cattle imports from Mexico over flesh-eating screwworms \| Reuters](https://feedsoft.ai/events/23700-us-again-halts-cattle-imports-from-mexico-over-flesh-eating-screwworms-reuters.md) | +2.6% | +6.8% |
| LCATTLE | 2025-05-13 | [Mexico to tighten cattle flows from south, rules out shutting border over screwworm](https://feedsoft.ai/events/24641-mexico-to-tighten-cattle-flows-from-south-rules-out-shutting-border-over.md) | -0.5% | +5.0% |
| LCATTLE | 2025-07-10 | [US recloses border with Mexico as flesh-eating parasite moves north \| AP News](https://feedsoft.ai/events/23705-us-recloses-border-with-mexico-as-flesh-eating-parasite-moves-north-ap-news.md) | +2.6% | +6.8% |
| FCATTLE | 2026-06-03 | [Flesh-eating screwworm confirmed in Texas calf as parasite crosses border from Mexico \| Reuters](https://feedsoft.ai/events/18763-flesh-eating-screwworm-confirmed-in-texas-calf-as-parasite-crosses-border-from.md) | +1.6% | +4.5% |
| FCATTLE | 2026-05-01 | [More Screwworm Cases in Mexico Threaten Cattle Trade With US](https://feedsoft.ai/events/19652-more-screwworm-cases-in-mexico-threaten-cattle-trade-with-us.md) | -2.0% | -6.8% |
| FCATTLE | 2025-07-10 | [US again halts cattle imports from Mexico over flesh-eating screwworms \| Reuters](https://feedsoft.ai/events/23700-us-again-halts-cattle-imports-from-mexico-over-flesh-eating-screwworms-reuters.md) | +1.6% | +7.7% |

## Sources

- washingtonpost.com: https://www.washingtonpost.com/nation/2025/12/02/parasite-cattle-mexico-trump-ban/

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