Why Is My Cow Passing Red Urine? Babesiosis (Tick Fever)

Red or coffee-coloured urine in a cow or buffalo is most often caused by babesiosis — tick fever or red water — a tick-borne blood parasite that destroys red blood cells. It is a veterinary emergency: the animal runs a high fever, becomes weak and anaemic, and can die within days if not treated early. If you see red urine, call your veterinarian immediately and start tick control across the whole herd.

What is babesiosis (tick fever)?

Babesiosis is caused by single-celled Babesia parasites — mainly Babesia bigemina and Babesia bovis in India — that are injected when infected Rhipicephalus (cattle) ticks feed. The parasites multiply inside red blood cells and burst them. The freed haemoglobin spills into the urine, giving the red-to-brown colour farmers call red water. High-yielding crossbred cows are usually hit harder than indigenous cattle, and cases rise in warm, humid weather — during and just after the monsoon.

Signs to watch for

• High fever (often 40–42°C), dullness and going off feed.
• Red, brown or coffee-coloured urine (haemoglobinuria) — the hallmark sign.
• Pale or yellowish (jaundiced) gums and eyes as anaemia sets in.
• Fast breathing and heartbeat, weakness, and a sharp drop in milk yield.
• Constipation followed by diarrhoea; sometimes abortion in pregnant animals.
• With B. bovis, nervous signs such as staggering or circling can occur.

Red urine has other causes too, such as true blood in the urine from cystitis or stones (haematuria), post-parturient haemoglobinuria from phosphorus deficiency, or bacillary haemoglobinuria. Only a vet can confirm babesiosis, usually with a blood-smear test. Do not inject random medicines on your own.

Treatment: act early

Babesiosis responds well to prompt, specific treatment by a veterinarian (a babesicidal drug such as diminazene or imidocarb), often with supportive care — fluids, and in severe anaemia a blood transfusion. The earlier treatment begins, the better the survival. Because the animal is anaemic and its liver is working hard to clear damaged blood cells, supportive nutrition during recovery matters: good-quality feed, clean water, and help rebuilding appetite and blood. A herbal liver tonic such as Cattle Remedies Heprich and a chelated mineral and vitamin supplement such as Cattle Remedies Verymin can be used as general recovery support alongside — never instead of — veterinary treatment. Our liver tonic buying guide and mineral mixture buying guide explain what to look for.

Prevention: control the ticks

Because the parasite travels inside ticks, tick control is the real defence:

• Use acaricide sprays or dips as advised by your vet, and rotate chemical groups to slow resistance.
• Treat the shed, walls and cracks — most tick life-stages live in the environment, not on the animal.
• Check animals often (udder, inner thigh, ears, tail switch), especially in the monsoon.
• Quarantine and treat newly bought animals before mixing them into the herd.
• Use a fresh needle per animal so blood parasites are not spread during injections or vaccination.
• Ask your vet whether a babesiosis vaccine is available in your area.

Babesiosis rarely travels alone: the same ticks spread theileriosis and other blood parasites. Our broader guide to tick-borne diseases in cattle lays out an integrated tick-control programme for the whole farm.

Frequently asked questions

Is red urine in cattle always babesiosis?

No. After tick exposure, babesiosis (haemoglobin in the urine) is the most common cause, but red urine can also be true blood from stones or cystitis, phosphorus-deficiency haemoglobinuria after calving, or other diseases. A vet’s blood smear and examination confirm the cause.

Can babesiosis spread from one cow to another directly?

Not through normal contact — it spreads through infected ticks, and through unclean needles or instruments that carry blood between animals. Controlling ticks and using one clean needle per animal breaks the chain.

Will my cow recover?

Many animals recover well when treated early, though severe anaemia is dangerous. Recovered cattle can remain long-term carriers, so steady tick control still matters afterwards.

The bottom line

Red water is a signal to move fast: call your veterinarian the same day, confirm the diagnosis, treat early, and hit the ticks hard across the herd. Year-round tick management is far cheaper than losing a high-yielding cow. Always consult your veterinarian for diagnosis and treatment.

References: MSD Veterinary Manual — Babesiosis in Animals; review of bovine babesiosis on NCBI PMC. Consult your local veterinary or animal husbandry service for tick-control and vaccination advice.

This article is for general educational purposes and does not replace professional veterinary advice.