# US finds first screwworm livestock case since 1976 | Latest Market News

> USDA confirmed the first US livestock case of New World screwworm since 1976, in a three-week-old calf in Texas about 100 miles from the Mexican border. The response includes a 20 km quarantine zone, increased sterile fly releases, border trapping and wildlife surveillance. The US cattle herd stood at 86.2 million head, the lowest since 1951.

- Date: 2024-03-25 · published 2024-03-25T12:00:00.000Z
- Category: disease · region US · magnitude medium
- Page: https://feedsoft.ai/events/31163-us-finds-first-screwworm-livestock-case-since-1976-latest-market-news
- Commodities: [Live Cattle](https://feedsoft.ai/c/LCATTLE.md), [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md)

## Why it matters

Screwworm can cut calf births and milk output and adds monitoring and treatment costs for ranchers, tightening an already small herd. Further detections could raise beef and cattle price expectations.

## Read by commodity

- FCATTLE: bullish ▲
- LCATTLE: bullish ▲

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| 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 | 2025-09-22 | [Mexico steps up controls after new screwworm case near US border \| AP News](https://feedsoft.ai/events/22810-mexico-steps-up-controls-after-new-screwworm-case-near-us-border-ap-news.md) | -0.8% | +0.3% |
| LCATTLE | 2020-02-07 | [Livestock Markets Strong, Grains Flat, Says CattleFax](https://feedsoft.ai/events/54716-livestock-markets-strong-grains-flat-says-cattlefax.md) | -1.1% | -8.1% |
| LCATTLE | 2024-11-25 | [US suspends Mexican cattle imports after New World screwworm case \| Reuters](https://feedsoft.ai/events/27346-us-suspends-mexican-cattle-imports-after-new-world-screwworm-case-reuters.md) | +1.6% | +3.8% |
| LCATTLE | 2024-11-29 | [U.S. livestock: Feeder cattle hit highest levels since July](https://feedsoft.ai/events/27555-u-s-livestock-feeder-cattle-hit-highest-levels-since-july.md) | +0.7% | +3.7% |
| FCATTLE | 2026-06-05 | [LIVESTOCK-CME feeder cattle rise to two-week high on screwworm worries \| MarketScreener](https://feedsoft.ai/events/12086-livestock-cme-feeder-cattle-rise-to-two-week-high-on-screwworm-worries.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 | 2025-09-22 | [Mexico steps up controls after new screwworm case near US border \| AP News](https://feedsoft.ai/events/22810-mexico-steps-up-controls-after-new-screwworm-case-near-us-border-ap-news.md) | -0.6% | +3.6% |

## Sources

- argusmedia.com: https://www.argusmedia.com/en/news-and-insights/latest-market-news/2835366-us-finds-first-screwworm-livestock-case-since-1976

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