Mandrill herpesvirus
Mandrill herpesvirus is a viral disease that affects mandrills, primates native to Africa. It is caused by viruses from the herpesvirus family, close to those found in other African monkeys.\n\nThis disease most often causes skin and oral l...
What is it?
Mandrill herpesvirus is a viral disease that affects mandrills, primates native to Africa. It is caused by viruses from the herpesvirus family, close to those found in other African monkeys.\n\nThis disease most often causes skin and oral lesions, sometimes accompanied by more severe signs. It is of particular importance because certain primate herpesviruses can, in rare cases, be transmitted to humans with potentially serious consequences.\n\nIn zoological parks and conservation centers, this disease is the subject of careful monitoring, particularly in Africa where populations of mandrills live in captivity or semi-captivity.
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 most common signs are small lesions or blisters on the skin of the face, lips, or in the mouth. These lesions can develop into scabs.\n\nThe animal may present with fever, decreased appetite and general depression. Excessive salivation and difficulty swallowing are possible if the mouth is affected.\n\nIn more severe forms, particularly in young animals or weakened subjects, neurological signs such as convulsions or changes in behavior may appear. These serious forms remain rare but require urgent treatment.
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 due to a herpesvirus, a virus which has the particularity of remaining latent (hidden) in the body after an initial infection, and being able to reactivate later, particularly during periods of stress or reduced immune defenses.\n\nThe virus is transmitted by direct contact with infected secretions (saliva, skin lesions) between individuals.
Stress, captivity, changes in environment or social group, as well as the weakening of the immune system favor the reactivation of the virus and the appearance of symptoms.\n\nYoung animals, individuals who are already sick or immunocompromised are more likely to develop severe forms.\n\nClose proximity to humans or other species of primates can also play a role in transmission.
Transmission
The virus is transmitted primarily by direct contact with the saliva or lesions of an infected animal. Transmission can also occur through contaminated objects (bowls, toys) shared between animals.\n\nTransmission to humans is possible, although rare, generally during close contact with an infected animal, a bite, or contact with lesions.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The veterinarian performs a complete clinical examination and carefully observes the skin and mouth lesions. Samples of the lesions can be sent to a specialized laboratory to confirm the presence of the virus through molecular biology tests.\n\nBlood tests can complete the assessment to assess the general condition of the animal and look for possible complications.
Treatment
Treatment is based on specific antivirals in severe forms, as well as supportive care: pain management, maintaining hydration and nutrition.\n\nLocal care of skin and oral lesions can be implemented to promote healing and prevent secondary infections.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Prevention is based on limiting stress in animals in captivity, a suitable and enriched environment, and regular health monitoring of groups.\n\nIsolation of animals with suspicious lesions helps limit the spread within a group.\n\nFor keepers and people in contact with mandrills, wearing gloves and respecting strict hygiene rules when handling sick animals are essential.
Possible complications
Possible complications include secondary bacterial infections on skin lesions, dehydration linked to difficulty eating, and in severe cases, neurological damage which can be life-threatening.\n\nIn humans, in the event of zoonotic transmission, the infection can potentially cause severe neurological damage, which warrants extreme caution.
When to see a veterinarian
Appearance of lesions or blisters on the skin of the face or in the mouth\nFever or unusual depression\nDifficulty eating or drinking\nPersistent excessive salivation\nAppearance of convulsions or sudden changes in behavior\nAny suspicious lesion in an animal that has been in contact with a sick individual
Transmission to humans
Certain non-human primate herpesviruses can be transmitted to humans during close contact (bites, scratches, contact with lesions or secretions). Although documented cases in humans remain rare, the infection can potentially be serious.\n\nAnyone in professional contact with mandrills (keepers, veterinarians) must respect strict hygiene measures and seek prompt medical attention in the event of injury or contact with a suspicious animal.
Prognosis
The prognosis is generally favorable for mild cutaneous forms, with spontaneous healing of the lesions within a few weeks.\n\nSevere forms, particularly with neurological involvement, have a more guarded prognosis and require rapid and intensive veterinary care.
Frequently asked questions
Is mandrill herpesvirus dangerous for humans?
Transmission to humans remains rare, but it is possible in the event of close contact with an infected animal. As a precaution, it is recommended to avoid direct contact with a mandrill with suspicious lesions and to seek medical attention in the event of injury or exposure.
Does the mandrill completely recover from this disease?
Mild cutaneous forms generally heal well, but the virus can remain latent in the body and reactivate later, particularly in times of stress.
How do you know if a mandrill has this disease?
Only a veterinarian can confirm the diagnosis, generally through a sample of the lesions analyzed in the laboratory. The appearance of vesicles or crusts on the skin or in the mouth should alert you and lead to a consultation.
Is there a vaccine for mandrill herpesvirus?
No, there is no vaccine currently available against this disease in mandrills.
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
CDC — Centers for Disease Control and Prevention
AVMA — American Veterinary Medical Association
Content reviewed by the TunisieVet editorial team · Updated 22 September 2026
Comments (0)
No comments yet.
AT A GLANCE
Need a veterinarian?
Find a practitioner near you on TunisieVet, with their specialities, hours and contact details.
Find a veterinarianCategories
Affected species
This information is provided for educational purposes only and is not a substitute for a veterinary consultation. If you have any concerns about your animal's health, consult a veterinarian.
Thinking of welcoming a pet? Dogs and cats are waiting for a family in Tunisia, and adoption is completely free.
Adoption listingsTo discover
Related diseases and linked Animalia content.
Simian Mandrill Malaria
Parasitic
Mandrill Metabolic Bone Disease
Other
Gastrointestinal parasitism of mandrill (roundworms)
Parasitic
Mandrill dental malocclusion
Other
TunisieVet in your pocket 📱🐾 Access your veterinary services wherever you are. [ Download the app ]
Learn more