Pangolin Parasites, Diseases and Health Threats

Published 9 June 2026 | 11 min read

Pangolins are best known for the threats posed by poaching and habitat loss. Far less attention is given to the pathogens, parasites and diseases that compromise their health from within. Yet for the veterinarians and rehabilitators working to save confiscated and injured pangolins, understanding these biological threats is every bit as urgent as stopping the illegal trade. Disease is a leading cause of death among rescued pangolins, and the interplay between stress, captivity and infection makes every confiscation a race against time.

This article examines the parasites, infections and health conditions that affect pangolins themselves, distinct from the separate question of zoonotic disease transmission to humans. The focus is on what makes pangolins sick, what we know about treating them, and the substantial gaps in veterinary knowledge that still hinder conservation efforts.

Ectoparasites: Ticks and Mites

All wild pangolins carry external parasites. The overlapping keratinous scales that form their armour create warm, protected microhabitats between the skin and scale margins where ectoparasites thrive. For Temminck's ground pangolin (Smutsia temminckii) in southern Africa, ticks are the most commonly documented ectoparasites, with species from the Amblyomma and Ixodes genera recorded during veterinary examinations of wild-caught and confiscated individuals.

Tick burdens and their consequences

Moderate tick loads appear to be a normal part of wild pangolin ecology. However, heavy infestations can cause anaemia, skin irritation and secondary bacterial infections at attachment sites. Ticks also serve as vectors for tick-borne pathogens including Ehrlichia and Babesia species, both of which have been detected in blood samples from African pangolins. In immunocompromised animals, particularly those weakened by the stress of capture or trafficking, tick-borne infections can become life-threatening.

Mites and mange

Mite infestations have been reported in both captive and wild pangolins, though documentation remains sparse. Sarcoptic mange, caused by Sarcoptes scabiei, has been recorded in Temminck's ground pangolin and can cause intense irritation, scale damage and hair loss in the soft-skinned ventral areas. Because pangolins cannot scratch effectively, mite infestations tend to worsen progressively until veterinary intervention is provided. Demodex mites have also been identified in skin scrapings, though their clinical significance in pangolins is not yet well understood.

Endoparasites: Worms and Protozoa

The gastrointestinal tract of pangolins hosts a community of internal parasites that has only recently begun to receive systematic study. Faecal analyses and post-mortem examinations have identified several categories of endoparasites across pangolin species.

Nematodes

Roundworms are the most frequently identified intestinal parasites in pangolins. Species from the families Ascarididae and Strongylidae have been recovered from the gut contents of both African and Asian pangolins. In healthy wild animals, nematode burdens are typically sub-clinical. In stressed or malnourished individuals, however, worm loads can escalate rapidly, contributing to weight loss, diarrhoea and intestinal obstruction. Heavy nematode infections are a common finding at post-mortem examination of pangolins that die in captivity.

Cestodes and trematodes

Tapeworms and flukes have been documented in pangolins, though less frequently than nematodes. The life cycles of these parasites typically require intermediate hosts, and the details of transmission in pangolins remain poorly mapped. Given that pangolins consume vast quantities of ants and termites, it is likely that certain invertebrate prey species serve as intermediate hosts, but this has not been confirmed through controlled studies.

Protozoa

Protozoan organisms including Eimeria species (coccidia) and flagellated protozoa have been identified in pangolin faecal samples. Coccidiosis can cause severe enteritis in pangolins under stress, with clinical signs including bloody diarrhoea, dehydration and rapid weight loss. In rehabilitation settings, coccidial infections are among the most urgent gastrointestinal conditions requiring immediate treatment with anti-protozoal medications.

Bacterial and Viral Infections

Bacterial infections represent a significant cause of morbidity and mortality in pangolins, particularly in captive and recently rescued individuals whose immune systems are suppressed by chronic stress.

Bacterial pneumonia

Pneumonia is one of the most commonly reported causes of death in captive pangolins worldwide. Bacterial cultures from affected animals have yielded Klebsiella pneumoniae, Pseudomonas aeruginosa and Escherichia coli, among other opportunistic pathogens. The progression from upper respiratory symptoms to fatal pneumonia can be rapid, sometimes occurring within 48 to 72 hours in severely stressed animals. Early detection through auscultation, radiography and blood work is critical, but pangolins' tendency to curl into a defensive ball makes thorough physical examination inherently difficult.

Septicaemia and wound infections

Pangolins confiscated from traffickers frequently present with wounds from snares, wire traps and rough handling. These wounds serve as entry points for bacterial infections that can progress to systemic septicaemia if not treated promptly. In South African rehabilitation contexts, wound management follows strict aseptic protocols, with culture-guided antibiotic therapy preferred over empirical treatment wherever laboratory turnaround times permit.

Viral infections

Viral disease in pangolins remains an area of active investigation. Paramyxoviruses and pestiviruses have been detected in pangolin tissue samples through molecular screening, though the clinical significance of many viral findings is unclear. Sendai virus-like paramyxoviruses have been identified in Asian pangolin species, and coronaviruses closely related to SARS-CoV-2 were famously detected in Sunda pangolins confiscated in China, though their pathogenic effect on the pangolins themselves is debated. For African species, viral surveillance data remain extremely limited, representing one of the most significant knowledge gaps in pangolin health research.

Fungal Infections and Skin Conditions

The warm, humid microenvironment beneath pangolin scales can foster fungal growth, particularly in animals housed in suboptimal captive conditions. Dermatophyte infections have been reported in rehabilitated pangolins, presenting as discolouration and deterioration of the keratin scales, sometimes accompanied by lesions on the softer skin of the belly and limbs.

Systemic fungal infections, while less commonly documented, have been identified at post-mortem examination in pangolins that died in captivity. Aspergillus species, which cause aspergillosis in a range of wildlife species, have been detected in the respiratory tracts of deceased captive pangolins. Maintaining appropriate humidity, ventilation and hygiene in captive enclosures is essential for preventing fungal disease, a challenge that rehabilitation centres in South Africa address through careful facility design and environmental monitoring.

Stress-Related Health Issues in Captive and Rescued Pangolins

Stress is arguably the single greatest health threat facing pangolins in human care. Pangolins are solitary, secretive animals with extremely low tolerance for confinement, handling and environmental disruption. The physiological consequences of chronic stress cascade through multiple organ systems, creating conditions that allow opportunistic infections to take hold.

Immune suppression

Elevated cortisol levels, a hallmark of chronic stress, suppress both innate and adaptive immune responses in mammals. In pangolins, this immunosuppression manifests as increased susceptibility to bacterial pneumonia, parasitic infections and wound healing failure. Animals confiscated after prolonged periods in traffickers' custody often present with multiple concurrent infections, a pattern directly attributable to stress-induced immune collapse.

Gastric ulceration

Gastric ulcers are a well-documented consequence of stress in captive pangolins. Post-mortem studies have revealed gastric and duodenal ulceration in a significant proportion of pangolins that die in captivity, sometimes with evidence of perforation and peritonitis as the proximate cause of death. Managing stress through environmental enrichment, minimal handling and quiet, dark housing is considered as important as any pharmacological intervention in preventing this condition.

Anorexia and nutritional decline

Stressed pangolins frequently refuse food, compounding the difficulty of maintaining body condition in an animal with highly specialised dietary requirements. In the wild, Temminck's ground pangolin feeds exclusively on ants and termites, consuming tens of thousands of insects per night. Replicating this diet in captivity is logistically challenging, and stressed animals that reject even well-prepared substitute diets deteriorate rapidly. South African rehabilitation programmes have developed species-specific feeding protocols using locally sourced ant and termite colonies supplemented with carefully formulated alternatives, but acceptance remains inconsistent.

Impact of Habitat Degradation on Disease Prevalence

The health of wild pangolin populations is inseparable from the condition of their habitat. As land conversion, mining and agricultural expansion fragment and degrade pangolin habitat across South Africa and the broader subcontinent, several disease-related consequences follow.

Habitat fragmentation concentrates pangolins into smaller areas, increasing contact rates between individuals and elevating the potential for parasite and pathogen transmission. Fragmented populations also experience reduced genetic diversity over time, which can diminish immune competence at the population level. Contact with domestic livestock and companion animals in degraded edge habitats exposes pangolins to novel pathogens, including canine distemper virus and bovine tuberculosis, against which they may have no evolved resistance.

Additionally, degraded habitats often support altered invertebrate communities, potentially forcing pangolins to feed on suboptimal prey species with different parasite loads. Changes in vegetation cover and microclimate can also affect tick density and distribution, altering the ectoparasite pressure on resident pangolin populations.

Veterinary Diagnostics and Treatment Protocols

Treating a sick pangolin requires specialised knowledge that few veterinary professionals possess. The field of pangolin veterinary medicine has advanced considerably in the past decade, driven largely by the increasing volume of confiscated animals requiring urgent care, but significant challenges remain.

Diagnostic approaches

Standard diagnostic protocols at intake in South African facilities typically include haematology and serum biochemistry panels, faecal flotation and direct smear for parasite identification, thoracic and abdominal radiography, and external examination for wounds and ectoparasites. Advanced diagnostics such as ultrasonography, endoscopy and CT imaging are employed at specialist facilities like the Johannesburg Wildlife Veterinary Hospital when indicated. Blood reference ranges for Temminck's ground pangolin have been established through collaborative research efforts, enabling clinicians to identify abnormal values with greater confidence than was possible even five years ago.

Treatment challenges

Drug dosing for pangolins is extrapolated from protocols developed for other species, with adjustments based on accumulating clinical experience. Pharmacokinetic studies specific to pangolins are virtually nonexistent, meaning that drug absorption, metabolism and excretion rates are largely unknown. Anaesthesia presents particular difficulties: pangolins' powerful curling reflex makes intravenous access challenging, and their unusual body composition, with heavy keratinous scales covering much of the body, complicates both injection site selection and patient monitoring.

Rehabilitation centres in South Africa and Zimbabwe, including those following protocols influenced by the Tikki Hywood Foundation's pioneering work, have developed structured treatment frameworks through years of clinical trial and documentation. These protocols cover antiparasitic treatment schedules, antibiotic selection for common infections, fluid therapy for dehydration, and nutritional rehabilitation. The sharing of clinical data between facilities, still largely informal, is gradually building the evidence base needed to standardise pangolin veterinary care.

Research Gaps and Challenges

Despite recent progress, pangolin health science remains in its early stages. Among the most pressing research gaps are the following.

Baseline health data for wild populations are scarce. Most clinical knowledge derives from confiscated animals that are already sick or stressed, making it difficult to define what constitutes normal health parameters for a free-ranging pangolin. Non-invasive sampling methods, such as faecal hormone analysis and environmental DNA collection from burrow sites, offer promising avenues for gathering health data from undisturbed wild populations.

Viral ecology in African pangolins is almost entirely unexplored. While Asian pangolin species have received significant virological attention following the COVID-19 pandemic, systematic viral surveillance of Temminck's ground pangolin and the three other African species has barely begun. Understanding the natural virome of African pangolins is essential both for their conservation and for broader One Health preparedness.

Pharmacological research specific to pangolins is urgently needed. Without species-specific pharmacokinetic data, every drug administration carries uncertainty about efficacy and safety. Collaborative studies between veterinary schools, rehabilitation centres and pharmaceutical researchers could address this gap, but funding remains limited.

How Disease Monitoring Supports Conservation Strategy

Health monitoring is not a peripheral concern in pangolin conservation; it is a core strategic component. Disease surveillance in rehabilitated and wild pangolins generates data that informs population viability assessments, identifies emerging health threats before they become crises, and guides habitat management decisions.

In South Africa, the integration of veterinary data into broader conservation planning is gaining traction. Post-release health monitoring of rehabilitated Temminck's ground pangolins, using GPS tracking combined with periodic recapture for health assessments, provides information on rehabilitation and release success rates while simultaneously building the wild health baseline that is so urgently needed. Collaborative databases that pool clinical records from multiple rehabilitation facilities are beginning to reveal patterns in disease prevalence, seasonal variation in parasite loads, and the relationship between pre-release health status and post-release survival.

As pangolin populations continue to face pressure from poaching and habitat loss, maintaining healthy, disease-resilient populations becomes ever more important. Every pangolin that survives rehabilitation and returns to the wild strengthens the species' long-term prospects, but only if that animal is genuinely healthy at the point of release. The work of pangolin veterinarians and health researchers is therefore not a secondary support function; it is conservation at its most direct and consequential.