# Arizona's First Screwworm Case Comes Weeks Before USDA's Planned Nov. 30 Reopening of the Nogales Cattle Port

> New World screwworm was confirmed in Arizona for the first time, in a dog in Cochise County, announced by USDA on Oct. 28, 2026. The detection comes about a month before USDA's planned Nov. 30 reopening of the Nogales port to Mexican cattle, a date the agency has made conditional and not changed.

- Date: 2026-11-04 · published 2026-11-04T18:14:24.913Z
- Category: disease · region US · magnitude medium
- Page: https://feedsoft.ai/events/80169-arizona-s-first-screwworm-case-comes-weeks-before-usda-s-planned-nov-30
- Commodities: [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md), [Live Cattle](https://feedsoft.ai/c/LCATTLE.md)

## Why it matters

A confirmed case in a US state raises the risk that the Nogales reopening is delayed, keeping Mexican feeder cattle supply tight and supporting US feeder cattle prices.

## Read by commodity

- FCATTLE: bullish ▲
- LCATTLE: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| FCATTLE | 2026-06-05 | [Cattle futures rally on first US screwworm detection - CME
						 \| The Cattle Site](https://feedsoft.ai/events/12089-cattle-futures-rally-on-first-us-screwworm-detection-cme-the-cattle-site.md) | +1.8% | +2.0% |
| FCATTLE | 2026-03-27 | [Screwworm Fears are Reshaping the U.S. Cattle Feeding Industry](https://feedsoft.ai/events/20119-screwworm-fears-are-reshaping-the-u-s-cattle-feeding-industry.md) | +2.6% | +1.1% |
| FCATTLE | 2026-01-06 | [As Screwworm Inches Closer, When Could the U.S. Reopen the Southern Border to Cattle Imports? - Drovers](https://feedsoft.ai/events/21009-as-screwworm-inches-closer-when-could-the-u-s-reopen-the-southern-border-to.md) | +0.9% | +2.5% |
| FCATTLE | 2024-11-29 | [Mexico’s Screwworm Outbreak Delays Mexican Cattle Exports Into the US Until After the First of the Year - Oklahoma Farm Report](https://feedsoft.ai/events/27349-mexico-s-screwworm-outbreak-delays-mexican-cattle-exports-into-the-us-until.md) | -1.5% | +1.0% |
| FCATTLE | 2025-07-28 | [Avian Flu Wiped Out Poultry. Now the Screwworm Is Coming for Beef.](https://feedsoft.ai/events/23704-avian-flu-wiped-out-poultry-now-the-screwworm-is-coming-for-beef.md) | +1.0% | +8.7% |
| LCATTLE | 2026-06-05 | [Cattle futures rally on first US screwworm detection - CME
						 \| The Cattle Site](https://feedsoft.ai/events/12089-cattle-futures-rally-on-first-us-screwworm-detection-cme-the-cattle-site.md) | +0.4% | -2.4% |
| LCATTLE | 2026-03-27 | [Screwworm Fears are Reshaping the U.S. Cattle Feeding Industry](https://feedsoft.ai/events/20119-screwworm-fears-are-reshaping-the-u-s-cattle-feeding-industry.md) | +2.5% | +5.6% |
| LCATTLE | 2026-01-06 | [As Screwworm Inches Closer, When Could the U.S. Reopen the Southern Border to Cattle Imports? - Drovers](https://feedsoft.ai/events/21009-as-screwworm-inches-closer-when-could-the-u-s-reopen-the-southern-border-to.md) | -0.1% | +2.2% |

## Sources

- foodworldnews.com: https://www.foodworldnews.com/articles/81835/20261104/arizona-screwworm-case-nogales-cattle-reopening.htm

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