Tick-Borne Disease Prevention: Protecting Your Herd

Ticks Do Not Just Bite, They Spread Disease

Ticks are more than blood-feeding pests. They are disease vectors that can pass along serious and sometimes fatal illnesses to cattle. While tick control matters for reducing direct damage from feeding, the diseases they carry often cause far greater economic losses.

Knowing which ticks carry which diseases, spotting early signs of tick-borne illness, and putting effective prevention strategies in place can protect your herd from serious health problems and financial hits.

Major Tick-Borne Diseases

Anaplasmosis

Anaplasmosis is the most significant tick-borne disease of cattle in the United States. The primary transmission route is through tick bites, but secondary routes include contaminated needles, dehorning equipment, and ear taggers. Biting flies (horse flies, stable flies) can also spread it mechanically, and cows can pass it to calves before birth through transplacental transmission.

The disease is expanding northward and is present throughout the southern U.S., with endemic status in Texas, Oklahoma, and the Southeast.

Clinical Signs

Treatment includes tetracycline antibiotics, blood transfusions in severe cases, and supportive care. Early treatment is critical for survival.

Vaccination does not prevent infection but reduces disease severity. Two doses are required initially with annual boosters.

Bovine Babesiosis (Cattle Tick Fever)

Babesiosis is a historic disease that nearly devastated the U.S. cattle industry. Today a quarantine zone runs along the Texas-Mexico border, with occasional outbreaks from stray cattle or wildlife. Fever ticks remain in Mexico and Central America.

The stakes are enormous: 90% mortality in naive cattle, and re-introduction would cause massive losses. Continuous surveillance is required. Clinical signs include severe anemia, hemoglobinuria (red urine), jaundice, and rapid death.

If you find unusual ticks in the quarantine zone, report them immediately. Babesiosis is a reportable disease requiring mandatory notification.

Theileriosis

Theileriosis has spread to several southeastern states and is transmitted by the Asian longhorned tick (and potentially other tick species). Signs include weakness, fever, abortion, and death, especially in calves. This disease may expand as the tick's range grows, so monitoring for new tick species on your property matters.

Other Tick-Associated Conditions

Tick Paralysis is caused by certain tick species, particularly the Rocky Mountain wood tick. It produces ascending paralysis starting in the rear legs. Removing the tick allows recovery, but it can be fatal if respiratory muscles are affected.

Leptospirosis can be transmitted between animals by ticks. It is usually subclinical in cattle but can cause abortion and is zoonotic (can infect humans).

Q Fever also involves possible tick transmission. It is usually subclinical in cattle but is more concerning for humans handling animals.

Tick Species and Their Diseases

Gulf Coast Tick (Amblyomma maculatum)

This species transmits hepatozoonosis (primarily a dog disease) and causes ear tip necrosis and secondary infections in cattle.

Lone Star Tick (Amblyomma americanum)

The Lone Star tick transmits ehrlichiosis, tularemia, STARI (Southern Tick-Associated Rash Illness), and alpha-gal syndrome in humans. It is active from spring through fall, all life stages will feed on cattle, and females are identifiable by the white spot on their back.

American Dog Tick (Dermacentor variabilis)

This species transmits Rocky Mountain spotted fever, tularemia, and occasionally causes tick paralysis.

Rocky Mountain Wood Tick (Dermacentor andersoni)

Transmits Rocky Mountain spotted fever, Colorado tick fever, tularemia, and is the primary cause of tick paralysis.

Winter Tick (Dermacentor albipictus)

Winter ticks can build massive populations and cause significant blood loss but are not associated with major disease transmission to cattle.

Asian Longhorned Tick (Haemaphysalis longicornis)

This is an invasive species of growing concern. Populations can explode rapidly because females reproduce without mating. It transmits theileriosis and has potential for other disease transmission as it establishes in more areas.

Prevention Strategies

Tick Control Methods

Pour-On Products

Pasture and Environmental Management

Biosecurity

Anaplasmosis Prevention Program

Natural Exposure: Young cattle develop immunity through mild disease and become carriers. Operations in anaplasmosis-free areas may not want carriers in their herds.

Vaccination requires an initial dose with a booster in four weeks, then annual boosters. It reduces severity but does not prevent infection.

Tetracycline feeding during high-risk periods reduces transmission but is labor intensive and requires attention to withdrawal considerations.

Tick and fly control limits transmission and is most effective as part of a consistent, integrated approach.

For herds pursuing an anaplasmosis-free status, the protocol includes purchasing only from tested-negative sources, quarantining and testing new arrivals, aggressive tick control, using single-use needles and equipment, cleaning and disinfecting between animals, and controlling biting fly populations.

Equipment Sanitation

Monitoring and Early Detection

Herd Monitoring

Watch for decreased grazing activity, fever (take temperatures if you suspect a problem), pale or yellow mucous membranes, weakness or reluctance to move, and animals going off feed. Increase your vigilance after introducing new animals, after cattle return from shows or sales, and following drought when stress and tick pressure combine.

Testing

Working with Your Veterinarian

Develop a prevention protocol with your vet, set up testing if needed, and plan your response to suspected cases. Call immediately when multiple animals show similar signs, when you see the combination of fever plus anemia plus jaundice, when unusual tick species are observed, or when animals do not respond to treatment.

Regional Considerations

Texas-Specific Concerns

The USDA Cattle Fever Tick Quarantine Zone runs along the Texas-Mexico border with temporary preventative quarantine areas. Compliance is required for cattle movement, and regular inspections and treatments apply. If your operation is in or near the zone, allow inspections, follow treatment requirements, report unusual tick findings, and obtain movement permits as required.

Anaplasmosis is particularly common in the Gulf Coast region and East Texas. Many herds carry the disease, and management decisions should be based on your herd's known status.

Southeast U.S.

The Gulf Coast tick range is expanding, Lone Star ticks are very common, and the Asian longhorned tick is a growing concern. Anaplasmosis prevalence is high across the region.

Northern States

Tick populations are expanding northward, and historically these areas have had fewer endemic disease issues. Operations in these regions need to establish herd status and pay attention to import regulations.

Economic Impact

Direct Costs

Indirect Costs

Prevention ROI

For a 100-cow herd without prevention in an endemic area, expect 10-20% clinical cases annually with 30-50% mortality in affected adults. Treatment costs plus death loss can easily exceed $10,000.

With prevention (vaccination plus tick control), vaccination runs $500-800/year and tick control $500-1,000/year, but reduced losses save $8,000 or more. The math favors prevention.

Frequently Asked Questions

Bottom Line

Anaplasmosis is the primary tick-borne disease concern for U.S. cattle operations, and age makes a big difference in outcomes. Calves handle infection well and develop carrier immunity, while adults face 30-50% mortality without treatment. The catch is that recovered animals remain carriers for life, so eradication from a herd is extremely difficult once the disease is established.

Prevention requires a multi-pronged approach: tick control, equipment sanitation, and biosecurity working together. Knowing your herd's anaplasmosis status through testing drives smarter management decisions, and regional awareness helps you calibrate your risk level. If your operation sits in or near the cattle fever tick quarantine zone, compliance with USDA requirements is not optional. Equipment sanitation, particularly using single-use needles, is a simple step that pays outsized dividends in limiting transmission.

Related Articles

• External Parasites: Flies, Lice, Ticks
• Horn Fly Management Options
• Pasture Management for Parasite Control
• Disease Symptom Quick Reference

References

• Kocan, K.M., de la Fuente, J., Blouin, E.F., Coetzee, J.F., & Ewing, S.A. (2010). The natural history of Anaplasma marginale. Veterinary Parasitology, 167(2-4), 95-107.
• Aubry, P. & Geale, D.W. (2011). A review of bovine anaplasmosis. Transboundary and Emerging Diseases, 58(1), 1-30.
• USDA-APHIS. (2024). Cattle Fever Tick Eradication Program: Guidelines and Regulations.
• Texas Animal Health Commission. (2024). Cattle Fever Tick Information.
• Jongejan, F. & Uilenberg, G. (2004). The global importance of ticks. Parasitology, 129(S1), S3-S14.
• Beard, C.B., et al. (2016). Multistate infestation with the exotic disease-vector tick Haemaphysalis longicornis. MMWR, 67(47), 1310-1313.