Gastrointestinal roundworm parasitism in aardvarks
Gastrointestinal parasitism caused by roundworms is a common condition in Cape aardvarks, a nocturnal burrowing mammal native to Africa. This disease affects the digestive tract, causing infestation with nematodes that live in the stomach o...
What is it?
Gastrointestinal parasitism caused by roundworms is a common condition in Cape aardvarks, a nocturnal burrowing mammal native to Africa. This disease affects the digestive tract, causing infestation with nematodes that live in the stomach or intestines. It is frequently seen in animals kept in captivity, particularly in zoos, where soil and enclosures can favor the persistence of parasite eggs. Although often subtle at first, a heavy infestation can seriously weaken the animal.
Key point
Untreated massive infestation can cause severe dehydration, anemia, and general weakness potentially fatal, especially in young animals.
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:
Clinical signs are often subtle initially but may include progressive weight loss despite maintained or decreased appetite, soft stools or intermittent diarrhea, sometimes with visible worms in the feces. The coat becomes dull and the animal may appear tired or less active than usual. In severe cases, the aardvark may show dehydration, abdominal distension or tenderness, and signs of anemia such as pale mucous membranes.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
Gastrointestinal parasitism caused by roundworms (nematodes) in aardvarks is due to intestinal parasites that lodge in the stomach or intestine. These worms belong to families similar to those found in other burrowing and insectivorous mammals. Eggs are passed in the feces, develop in soil or on vegetation, then are ingested by the aardvark during its search for food (ants, termites) or when licking its contaminated coat. In zoos, contamination often occurs through the environment (soil, bedding) or contaminated equipment.
Young aardvarks are more vulnerable due to lower immune competence. Captive living in enclosures with contaminated soil favors persistence and reinfection. Stress, unsuitable diet, or concurrent immunosuppression increases the animal's susceptibility. High animal density in the same space and inadequate cleaning are aggravating factors.
Transmission
Transmission occurs by the fecal-oral route: the aardvark ingests worm eggs present in soil, water, or food contaminated by feces containing the parasite. There is no direct transmission between individuals without passage through a contaminated environment.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The exotic animal veterinarian suspects gastrointestinal parasitism when facing a thin animal with dull coat and repeated digestive disturbances. Confirmation comes from fecal analysis (coproscopy) that looks for roundworm eggs under the microscope. Multiple samples may be necessary because egg shedding can be irregular. Complete blood work complements the examination to assess overall impact (anemia, protein levels). In some cases, ultrasound or digestive endoscopy helps visualize parasites or the lesions they cause.
Treatment
Treatment relies on broad-spectrum antiparasitic medication active against nematodes, prescribed and dosed only by the veterinarian according to the animal's weight and condition. Nutritional support and rehydration may be added in cases of weakness. Follow-up with fecal checks after treatment confirms effectiveness and detects possible resistance or reinfection.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Prevention relies on good enclosure hygiene, with regular cleaning and substrate management to limit the buildup of parasite eggs in the soil. Periodic fecal examinations allow detection of infestation before it becomes clinically serious. Rotation of enclosures or soil disinfection when occupants change is recommended in zoological facilities. Stress and unbalanced diet that weaken natural defenses should also be avoided.
Possible complications
Severe and prolonged infestation can cause anemia, significant dehydration, growth delay in young animals, and general weakening of immune function making the animal more vulnerable to other infections. In extreme cases, intestinal obstruction or perforation from massive parasite burden is possible, though rare.
When to see a veterinarian
The animal becomes noticeably thin despite eating normally.
Worms are seen in the faeces.
Diarrhoea persists or gets worse.
The aardvark becomes unusually tired or lethargic.
The mucous membranes appear pale or the animal appears dehydrated.
Prognosis
The outlook is generally good when the infection is detected and treated early. Young, elderly or already weakened animals have a more guarded prognosis, as the infection may then worsen their health status. Without treatment, a heavy parasite burden can lead to severe weight loss and potentially life-threatening complications.
Frequently asked questions
Is parasitism by roundworms frequent in captive aardvarks?
Yes, it is one of the most commonly reported parasitic infections in this species in zoos, particularly in young animals or those recently transferred.
Can an infested aardvark transmit these worms to other animals?
Some digestive nematodes can contaminate other animals sharing the same enclosure if hygiene is inadequate, but the risk to humans is considered very low.
How can I prevent my aardvark from becoming infested again after treatment?
Thorough cleaning of the enclosure, replacement of contaminated bedding, and regular fecal monitoring help prevent reinfestations.
Are the symptoms always visible?
No, a light infestation can remain silent for a long time. It is often routine monitoring that reveals the presence of parasites before clinical signs appear.
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
ESCCAP — European Scientific Counsel Companion Animal Parasites
Content reviewed by the TunisieVet editorial team · Updated 01 September 2026
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