Disease-resistant livestock genetics — genomic selection, adapted breeds, gene-edited PRRS-resistant pigs — instead of routine antibiotics, acaricides and repeated mass treatment

Replaces (partial): routine antibiotics, acaricides and mass treatments in susceptible animals · Scope: pigs, cattle, poultry · Evidence: high (breeds, genomics), high-in-trials (gene editing)

The chemical problem#

• Global antimicrobial use in food animals is larger than in human medicine and still growing in middle-income countries.
• Viral diseases like PRRS in pigs open the door to bacterial infections, so whole groups receive antibiotics.
• Tick-susceptible European cattle breeds in the tropics need acaricide dipping every 1–3 weeks (see V06); resistance to acaricides is widespread.

Product overview#

1. Adapted and crossbred breeds — Bos indicus and composite cattle carry far fewer ticks; local poultry and small-ruminant breeds tolerate local parasites.
2. Genomic selection for disease traits — breeding values for mastitis resistance, somatic cell count, hoof health, tick burden, Marek’s disease resistance (poultry).
3. Gene editing of host receptors — pigs with an edited CD163 receptor domain are resistant to PRRS virus; approved by the US FDA in 2025 for food use. Heat-tolerant “slick” cattle (FDA low-risk determination, 2022) are another example.
4. Delivery — breeding stock, semen for artificial insemination (AI) and embryos.

Active ingredient / Composition#

• The trait: a gene variant or a polygenic breeding value.
• Delivered as semen straws, embryos, grandparent/parent stock or crossbred replacements.

Key facts#

Advantages#

• Reduces the disease, not just the symptoms → fewer treatments of every kind.
• Effect is permanent and cumulative over generations.
• Delivered through existing AI and breeding-stock channels.

Mode of action#

• PRRS virus needs the SRCR5 domain of the CD163 receptor to enter macrophages; removing that domain blocks infection without affecting other functions of the receptor.
• Tick resistance in indicine cattle combines skin and immune factors that reduce tick attachment and survival.
• Polygenic disease resistance shifts the herd average: fewer clinical cases, lower pathogen load.

Application#

Limitations#

• Gene-edited animals are not legal in many markets (EU, Russia); exporters must follow importer rules.
• Breeding progress is slow (years), and selecting for disease traits can conflict with production traits.
• Resistance to one disease does not remove the need for vaccination and biosecurity against others.
• Smallholder access to improved genetics depends on AI services.

Evidence of displacement — D1: works, adoption not proven#

Verified figures (the number is in the quoted sentence and the sentence is on the source page):

• performance — A PRRS outbreak significantly increases antibiotic use in nursery and grower pigs. (USA, 2023; weak: gb.pic.com)
• performance — Injectable and water antimicrobial use in groups of nursery pigs increased 379 percent during the 15-week epidemic phase after a farm became PRRS-positive. (USA, 2023; weak: prrsresistantpig.com)
• performance — The use of injectable antibiotics increased 274 percent in older pigs closer to market weight during the 15-week epidemic phase after a farm became PRRS-positive. (USA, 2023; weak: prrsresistantpig.com)

Suppliers — real products and services (from the vendor index)#

Active vendors whose own card shows livestock genetics delivery (AI, semen, breeding stock). None of these cards claims a specific disease-resistance line; they are listed as the delivery channel for improved genetics.

Companies below are active vendors in the vendor index whose own card (profile / official website) shows this product or service — matched 2026-10-05 by keyword and checked by hand against the card text. Being listed is not an endorsement; open each card for evidence, contacts and status.

Update 2026-10-05: the new Europe dataset supplies this product — rows marked Europe below. For the other regions the gap noted above still stands unless a row says otherwise.

Honest finding: no company in the index offers gene-edited disease-resistant animals or a named disease-resistance breeding line. The PRRS-resistant pig is held by a global breeding company outside the three regional datasets.

Government funding signals#

Scanned 2026-10-01 (OpenAIRE + NSF); candidates reviewed by hand.

Signal: Moderate (USDA; added 2026-10-02). NSF and OpenAIRE returned nothing for “PRRS resistant”, but the USDA source finds PRRS among the most-funded swine-health topics: 15 or more NIFA awards of $0.5–2.4 M (e.g. 20196701529918, $2.36 M; 20226801437266, $1.0 M). Most fund vaccines and virology rather than host genetics, so the signal for the genetic route is weaker than the headline. Earlier note: The query “PRRS resistant” returned no candidates. The PRRS-resistant pig was developed with university research (University of Missouri) and private breeding-company money; animal-genetics funding mostly runs through agricultural agencies (USDA, national breeding programmes) that this pass does not query.

Scientific evidence#

• Whitworth KM, Rowland RRR, Ewen CL, et al. (2016). Gene-edited pigs are protected from porcine reproductive and respiratory syndrome virus. Nature Biotechnology 34: 20–22.
• Burger BT, Beaton BP, Campbell MA, et al. (2024). Generation of a commercial-scale founder population of porcine reproductive and respiratory syndrome virus resistant pigs using CRISPR-Cas. The CRISPR Journal 7: 12–28.
• Bishop SC, Woolliams JA (2014). Genomics and disease resistance studies in livestock. Livestock Science 166: 190–198.
• Van Boeckel TP, Brower C, Gilbert M, et al. (2015). Global trends in antimicrobial use in food animals. Proceedings of the National Academy of Sciences 112: 5649–5654.

Bioeconomy value#

Genetics is the most durable way to reduce antibiotic and acaricide use: the animal stops getting sick. The index already holds the AI and breeding-stock channels; the missing link is resistant genetics from outside the region.

Cross-links: V01–V06 (vaccines, antibiotic alternatives, tick control); SG04 aquaculture genetics; DX01 diagnostics.