# New World Screwworm: Current Issues - EveryCRSReport.com

> A Congressional Research Service primer explains New World screwworm, a parasite that lays eggs in wounds of warm-blooded animals and destroys living tissue. USDA eradicated it from the U.S. in 1966, and recent Mexican cases have raised domestic concerns. A 1976 Texas outbreak was estimated to cost $732 million to livestock producers.

- Date: 2025-06-02 · published 2025-06-02T12:00:00.000Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/24163-new-world-screwworm-current-issues-everycrsreport-com
- Commodities: [Live Cattle](https://feedsoft.ai/c/LCATTLE.md), [Feeder Cattle](https://feedsoft.ai/c/FCATTLE.md)

## Why it matters

The background on outbreak risk and historical losses underpins why the cattle import closure and tight supplies continue to support livestock prices.

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| LCATTLE | 2025-08-18 | [All-out effort to fight New World screwworm needed](https://feedsoft.ai/events/23286-all-out-effort-to-fight-new-world-screwworm-needed.md) | +0.8% | -1.2% |
| LCATTLE | 2025-05-11 | [US suspends Mexican cattle imports over New World screwworm](https://feedsoft.ai/events/38-us-suspends-mexican-cattle-imports-over-new-world-screwworm.md) | +0.3% | +4.8% |
| LCATTLE | 2024-07-14 | [Interview: Everything you need to know about new world screwworm in cattle - Americas](https://feedsoft.ai/events/29213-interview-everything-you-need-to-know-about-new-world-screwworm-in-cattle.md) | -0.5% | -0.2% |
| LCATTLE | 2024-10-24 | [Frequently asked questions about new world screwworm - Americas](https://feedsoft.ai/events/27812-frequently-asked-questions-about-new-world-screwworm-americas.md) | +0.9% | -1.1% |
| 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% |
| FCATTLE | 2025-08-18 | [All-out effort to fight New World screwworm needed](https://feedsoft.ai/events/23286-all-out-effort-to-fight-new-world-screwworm-needed.md) | +4.1% | +3.7% |
| FCATTLE | 2025-05-11 | [US suspends Mexican cattle imports over New World screwworm](https://feedsoft.ai/events/38-us-suspends-mexican-cattle-imports-over-new-world-screwworm.md) | -0.4% | +4.6% |
| FCATTLE | 2024-07-14 | [Interview: Everything you need to know about new world screwworm in cattle - Americas](https://feedsoft.ai/events/29213-interview-everything-you-need-to-know-about-new-world-screwworm-in-cattle.md) | -1.2% | -4.7% |

## Sources

- everycrsreport.com: https://www.everycrsreport.com/reports/IN12558.html

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