Piroplasmosis in African savanna elephants
Piroplasmosis is a blood disease caused by tiny parasites called piroplasms (closely related to Babesia). These parasites invade the elephant's red blood cells and gradually destroy them. In African savanna elephants, this disease remains...
What is it?
Piroplasmosis is a blood disease caused by tiny parasites called piroplasms (closely related to Babesia). These parasites invade the elephant's red blood cells and gradually destroy them.
In African savanna elephants, this disease remains rare and poorly documented compared to other large African herbivores. It is transmitted by ticks that bite the animal as it moves through vegetation.
The disease affects both wild elephants and those living in captivity or reserves, wherever the tick vectors are present.
Key point
A rare disease but potentially serious if left untreated, due to the anaemia it causes.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
The signs are not always easy to spot in such a large animal, especially when observed from a distance.
Fever, general lethargy, and loss of appetite may be observed in an elephant that is usually alert.
Destruction of red blood cells can lead to pale mucous membranes (visible around the mouth or eyes), sometimes a yellowish discoloration of tissues (jaundice), and darker-than-normal urine.
The animal may appear tired, walk more slowly, or isolate itself from the group, which should alert caretakers or field monitoring teams.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
The disease is caused by protozoan piroplasms that parasitize the interior of red blood cells. Once established, they multiply and eventually rupture these cells, causing anemia (a shortage of red blood cells).
Elephants living in areas with heavy tick infestation are at greatest risk, especially during warm, humid seasons that favour these parasites.
Young animals, individuals weakened by stress, injury, or other disease, and animals newly introduced into an infested environment appear more vulnerable.
Proximity to other wild or domestic large herbivores carrying ticks can increase the risk of exposure.
Transmission
The parasite is transmitted through the bite of infected ticks that live in savanna vegetation and brushy areas. The tick becomes infected when it feeds on an infected animal, then transmits the parasite to a new host during its next blood meal. There is no direct transmission between elephants.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The veterinarian relies on clinical examination of the animal and blood samples analysed in the laboratory. Microscopic examination of a blood smear allows identification of parasites inside red blood cells.
Additional tests (blood count, screening for anaemia) help assess the severity of the condition. With such a large animal, these samples often require suitable restraint or light anaesthesia performed by an experienced team.
Treatment
Treatment relies on specific antiparasitic drugs directed against piroplasms, prescribed and administered only by a veterinarian specialising in wildlife medicine.
General supportive care (fluids, comfort measures) may be needed in addition to help the animal recover, particularly in cases of marked anaemia.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Tick control is the foundation of prevention: vegetation management, pasture management, and when feasible, application of external antiparasitic products suitable for elephants under veterinary supervision.
Regular monitoring of the health status of animals in reserves or captivity allows early detection of any unusual signs.
No vaccine is currently available for this disease in elephants.
Possible complications
Severe anaemia can weaken the animal, make it more vulnerable to other infections, and complicate recovery. In the most severe cases, damage to internal organs is possible if the disease is not treated.
When to see a veterinarian
An elephant shows abnormal lethargy or stays away from the herd.
The mucous membranes (mouth, eyes) appear pale or yellowish.
The animal refuses to eat or shows visible weight loss.
Suspected fever or marked weakness is present.
Urine is abnormally dark.
Prognosis
Prognosis depends greatly on how quickly treatment is started. When detected early and managed by an experienced veterinary team, the outcome is usually favorable. Delayed diagnosis or severe anemia worsen the prognosis.
Frequently asked questions
Is elephant piroplasmosis transmissible to humans?
No, this disease is not known to spread to humans. It circulates among animals through ticks.
How does an elephant catch this disease?
Only through the bite of a tick already carrying the parasite, generally when passing through infested vegetation.
Can an elephant be vaccinated against piroplasmosis?
No, there is no vaccine for this disease in elephants. Prevention is mainly through tick control.
Is this disease common in African savanna elephants?
It remains rare and poorly documented compared to other parasitic diseases in large African herbivores.
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
FAO — Organisation des Nations unies pour l'alimentation et l'agriculture
Content reviewed by the TunisieVet editorial team · Updated 30 August 2026
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