Galago Herpesvirus Infection
Galago herpesvirus infection is a rare but serious viral disease affecting these small nocturnal primates native to Africa, which are increasingly kept in private collections and zoos. It is caused by a virus from the Herpesviridae family....
What is it?
Galago herpesvirus infection is a rare but serious viral disease affecting these small nocturnal primates native to Africa, which are increasingly kept in private collections and zoos. It is caused by a virus from the Herpesviridae family. This infection can remain quiet for a time before developing suddenly into severe disease affecting multiple organs, particularly the nervous system and skin.
The disease is feared in captivity because it can spread quickly among animals living in groups, and the outcome is often unfavorable once clinical signs appear.
Key point
This disease can progress rapidly to severe neurological involvement and death, particularly if early intervention is not provided.
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 clinical signs of galago herpesvirus infection are often nonspecific at first: the animal becomes sluggish, eats less, and shows reduced activity compared to normal.
Skin lesions may appear as small crusts or blisters, particularly on the muzzle, lips, or hairless areas of the body.
When the virus affects the nervous system, more concerning signs may develop: tremors, abnormal movements, seizures, or even partial paralysis. The animal may also drool excessively and hide more than usual.
The progression can be very rapid, with deterioration in just a few days.
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 a specific herpesvirus capable of infecting galagos and sometimes other species of nonhuman primates. The virus replicates in cells of the skin, mucous membranes, and nervous system, which explains the variety of symptoms observed.
Galagos living in groups or in facilities housing multiple individuals (zoos, wildlife rescue centers, private collections) face higher exposure. Stress, weakened immunity, overcrowded environments, or poor hygiene conditions can trigger clinical signs in an animal carrying the virus.
Contact with other primate species, sometimes carriers of different but closely related herpesviruses, may also represent a risk factor.
Transmission
Transmission occurs mainly through direct contact with secretions from an infected animal (saliva, skin lesions), or via contaminated objects (cages, food bowls, bedding). Close contact between individuals, particularly in captivity in shared groups or enclosures, promotes virus transmission.
Some carriers may shed the virus without showing obvious clinical signs, which complicates disease control in collections.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Diagnosis is based on clinical examination by a veterinarian experienced with exotic animals, supported by specialized laboratory testing (viral detection using molecular biology techniques, analysis of skin or blood samples). These tests are typically performed in reference veterinary laboratories.
The veterinarian may also rely on the animal's history, its living environment, and the presence of other cases in the group to guide investigations.
Treatment
There is no validated specific treatment to eliminate the virus once infection is established. Veterinary management focuses mainly on supporting the animal: supportive care, pain management, assisted feeding if necessary, and close monitoring in case of neurological involvement.
In some cases, antivirals may be considered by the veterinarian depending on severity and the animal's response, but their effectiveness remains variable.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Prevention relies mainly on strict biosecurity measures in captive settings: systematic quarantine for any new animal before introduction into a group, regular disinfection of equipment and enclosures, and limiting contact with other primate species.
A low-stress environment, appropriate nutrition, and regular veterinary monitoring help maintain good immunity in galagos, which may limit clinical disease expression in carrier animals.
There is no vaccine currently available against this disease in galagos.
Possible complications
The most serious complications involve central nervous system involvement, which can lead to repeated seizures, progressive paralysis, and rapid death.
Bacterial superinfections of skin lesions may also occur and worsen the animal's overall condition.
When to see a veterinarian
The animal becomes suddenly lethargic or refuses to eat.
Crusts, blisters, or unusual lesions appear on the skin or muzzle.
The animal experiences tremors, convulsions, or paralysis, even if partial.
A sudden change in behavior is observed, such as unusual withdrawal or new aggression.
Multiple animals in the same group show similar signs at the same time.
Prognosis
The prognosis is guarded to poor when neurological signs develop, as the disease often progresses rapidly toward a fatal outcome despite treatment.
When only subtle skin signs are present, some animals may survive with careful monitoring, but they can remain carriers of the virus and pose a transmission risk to other galagos.
Frequently asked questions
Is herpesvirus infection in galagos transmissible to humans?
This virus is specific to non-human primates and is not considered transmissible to humans based on current knowledge. As a precaution, it is nonetheless recommended to wear gloves when handling a sick animal.
Can a galago with the disease be completely cured?
There is no treatment that can completely eliminate the virus. Care aims to support the animal and limit complications, but complete recovery with viral clearance is not guaranteed.
How do you protect other galagos in a group if one animal is affected?
Immediate isolation of the sick animal, disinfection of shared equipment, and close monitoring of other individuals are essential to limit the spread of the virus within the group.
Is this disease common in galagos?
It remains rare but concerning, mainly documented in captive settings such as zoos or private collections, where close contact between animals promotes its spread.
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
Content reviewed by the TunisieVet editorial team · Updated 25 August 2026
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