# Screwworm Reaches Arizona as a Cochise County Dog Becomes the State's First Case and a 20-Kilometer Zone Takes Effect

> The USDA confirmed a New World screwworm infestation in a household dog in Cochise County, Arizona, on October 28, making Arizona the third U.S. state with cases after Texas and New Mexico. The Arizona Department of Agriculture said a local veterinarian found the wound on October 26, and USDA laboratory testing confirmed the case. USDA counts reported 71 cases nationwide since June, with 18 active.

- Date: 2026-11-03 · published 2026-11-04T01:08:13.745Z
- Category: disease · region US · magnitude medium
- Page: https://feedsoft.ai/events/78929-screwworm-reaches-arizona-as-a-cochise-county-dog-becomes-the-state-s-first
- Commodities: [Live Cattle](https://feedsoft.ai/c/LCATTLE.md), [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md)

## Why it matters

Screwworm spreading into a new state raises the risk of movement restrictions on US cattle and feeder cattle, tightening live cattle supply and supporting prices for beef and feed demand. The westward spread into the border region keeps the market sensitive to further restrictions on Mexican cattle imports.

## Read by commodity

- FCATTLE: bullish ▲
- LCATTLE: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| 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 | 2026-01-03 | [U.S. livestock: Cattle futures surge as second screwworm case announced \| The Western Producer](https://feedsoft.ai/events/21012-u-s-livestock-cattle-futures-surge-as-second-screwworm-case-announced-the.md) | +0.0% | +1.1% |
| 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% |
| LCATTLE | 2023-06-30 | [Upcoming Events - USDA Unveils $100 Million 'Grand Challenge' to Thwart Flesh-Eating Screwworm as Threat Reaches U.S. Border](https://feedsoft.ai/events/35436-upcoming-events-usda-unveils-100-million-grand-challenge-to-thwart-flesh-eating.md) | -1.1% | +0.5% |
| LCATTLE | 2023-02-27 | [The National Directorate of Animal Health, in response to the unusual increase in cases of New World Screwworm in the Province of Darién, announces – COPEG](https://feedsoft.ai/events/37274-the-national-directorate-of-animal-health-in-response-to-the-unusual-increase.md) | +0.9% | +0.3% |
| 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 | 2026-01-03 | [U.S. livestock: Cattle futures surge as second screwworm case announced \| The Western Producer](https://feedsoft.ai/events/21012-u-s-livestock-cattle-futures-surge-as-second-screwworm-case-announced-the.md) | +1.3% | +2.9% |
| 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% |

## Sources

- natureworldnews.com: https://www.natureworldnews.com/articles/73704/20261103/screwworm-reaches-arizona-cochise-county-dog-becomes-states-first-case-20-kilometer-zone.htm

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