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Leishmaniasis in Dogs on Mallorca: Prevention, Testing and Treatment

Responsible for this content: Frank Menze

Leishmaniasis in dogs is not a niche topic on Mallorca, but one of the first questions anyone should ask themselves if they're moving to the island with a four-legged friend, adopting a dog from a rescue shelter, or bringing their own dog along to the holiday home. Contrary to what many believe, the disease is not transmitted from dog to dog, but almost exclusively through the bite of a tiny, usually unnoticed sandfly. That's exactly what makes it so insidious: a dog can become infected in a single warm summer night without you noticing anything – and symptoms sometimes only appear years later, occasionally only after returning to Germany. In this guide you'll learn how the pathogen is transmitted, which protective measures actually help, how a diagnosis is carried out, and what a positive titre in an adopted dog specifically means. This doesn't replace a visit to the vet – but it does provide a solid foundation for asking the right questions once you're there.

Leishmaniasis in dogs: protection, testing & treatment

Is your dog already reliably protected against sandflies – or is an adoption dog with an unclear titre about to arrive at your door?

What is leishmaniasis in dogs? Pathogen and spread

Canine leishmaniasis is caused by Leishmania infantum, a single-celled parasite that multiplies in the dog's body, among other places in white blood cells, thereby attacking the immune system. The disease belongs to the so-called Mediterranean diseases and is widespread across large parts of the Mediterranean region – Spain is considered one of the most affected countries in Europe, and Mallorca is explicitly classified as an endemic area by several specialist portals.

How high the actual proportion of infected dogs really is cannot be answered with a single reliable figure – the data varies greatly depending on the region, survey method, and timing of the study. Nevertheless, rough reference points can help with orientation:

Region Finding Interpretation
Spain nationwide Individual surveys report double-digit percentages of dogs with antibodies against Leishmania Values vary greatly depending on the part of the country, with a clear south-north gradient
Mallorca Classified by animal welfare and specialist portals as an endemic area for canine leishmaniasis No official prevalence figure specifically for the island available
Northern Central Europe So far no established infection risk in everyday life Sandflies are gradually spreading northward due to climate change

Note: A reliable, official prevalence statistic specifically for Mallorca is not publicly available. When making concrete decisions, always rely on the assessment of your local vet, not on generic figures from the internet.

The sandfly: vector number one

No sandfly, no leishmaniasis – this rule of thumb is essentially accurate. The sandfly (Spanish flebotomo) is neither a classic fly nor a mosquito in the strict sense, but a distinct, very small insect that can transmit the parasite through its bite.

Characteristic Details
Size approx. 2–3 mm, sand-coloured
Activity period active at dusk and at night, roughly from one hour after sunset until one hour before sunrise
Flight height usually only up to around 3 metres, sensitive to wind
Season generally spring to autumn, peaking in the hot months of July and August
Distinctive feature almost silent, can slip through coarse-meshed standard mosquito nets

Note: A normal fly screen is often not sufficient because of the sandfly's small size. Anyone who really wants to make their home mosquito-proof needs a finer-meshed net.

Transmission routes: what's true, what's a myth

The main route of transmission is the bite of the female sandfly. According to current knowledge, transmission via saliva, shared bowls, mutual sniffing or normal contact between dogs is not the usual route of infection. This is an important reassurance for anyone wondering whether their own, unaffected dog is at risk through contact with an affected dog in the park – the answer is: in everyday life, practically not. The actual risk arises solely from spending time in sandfly habitats during the insect's active periods.

Symptoms: when should you see a vet?

Leishmaniasis can present very differently and is therefore often recognised only at a late stage. Commonly reported signs include, among others, skin changes and ulcers, cracked or scaly ear edges, weight loss despite normal food intake, and general lethargy. This list is not exhaustive and does not replace a diagnosis – many of these symptoms can also have other causes. What matters is this: if your dog comes from an endemic area like Mallorca or has spent a lot of time there, leishmaniasis belongs on the list of possibilities that a vet should investigate.

Diagnosis: antibody titre and its limits

Diagnosis relies primarily on a serological antibody test (titre), which can be supplemented and confirmed by further methods such as a PCR test. Important for expats and adopters: the incubation period can range from months to several years. This means a negative test shortly after possible exposure does not reliably rule out infection – the body may not yet have produced detectable antibodies. A single negative result is therefore not a definitive all-clear, but merely a snapshot in time.

Timing Recommendation Approximate cost range
6–8 weeks after arrival/adoption "Mediterranean check" including leishmaniasis antibody test Costs vary considerably depending on the practice and scope of testing – ask for a cost estimate in advance
If symptoms are suspected Antibody titre, possibly supplemented with PCR and organ values individual, depending on scope
In cases of known exposure without symptoms regular follow-up tests in consultation with the vet individual

Note: From the outset, plan a second follow-up appointment for a newly adopted or brought-along dog, rather than relying on a single early test.

Treatment: what's possible today – and what isn't

Canine leishmaniasis is now considered treatable, but generally not curable. The goal of treatment is to reduce the parasite load, control symptoms and maintain the dog's quality of life – not to completely eliminate the pathogen from the body. Treated dogs therefore usually remain carriers of the parasite for life and need regular veterinary check-ups, including kidney function tests, since the disease can put a strain on the kidneys.

The specific therapy is generally based on a combination of prescription medications, which the vet tailors individually to weight, kidney function and disease stage – questions of dosage are exclusively a matter for veterinary professionals and are deliberately not covered here. There are also preventive vaccines against canine leishmaniasis; whether a vaccination makes sense and is available for your dog is best clarified directly on site with your vet.

Important: This guide does not replace veterinary advice. If leishmaniasis is suspected, or for any treatment decision, your dog needs to be seen by a vet.

Protection: the most effective everyday measures

Since there is no vaccine offering one hundred percent protection, avoiding sandfly bites remains the most important pillar of prevention.

  1. Use repellent: Collars or spot-on products based on active ingredients such as deltamethrin or permethrin significantly reduce the risk of being bitten. Discuss with your vet which product and application are suitable for your dog.
  2. Avoid dusk and night: Keep your dog indoors as much as possible during the sandfly's main activity period – roughly from one hour after sunset to one hour before sunrise.
  3. Fine-mesh nets: Ordinary mosquito nets often don't keep sandflies out; finer-mesh nets on windows and doors offer better protection.
  4. Check light sources: Some light colours attract sandflies more than others; reducing unnecessary outdoor lighting in the evening hours lessens their attraction.
Measure Effect Practical note
Repellent collar/spot-on (deltamethrin, permethrin) significantly reduces the risk of bites discuss choice and application with your vet
keep the dog indoors in the evening/at night avoids the main activity period approx. 1 hour after sunset to 1 hour before sunrise
fine-mesh netting on windows/doors prevents them from getting in standard fly screens are often not enough
vaccination (depending on availability) an additional element in overall protection availability and suitability need to be clarified individually

If you're bringing your dog to Spain for the first time, it's worth taking a look at our guide Bringing your dog to Spain – there you'll find the organisational steps around entry, chip and paperwork that come up alongside health protection.

Adopted dog with a positive titre: what now?

Many adopted dogs from Mallorca arrive with their new families in Germany or Austria carrying a positive leishmaniasis titre. This is not initially a reason to panic: a positive titre shows that the dog has had contact with the pathogen and has formed antibodies – it does not automatically mean the dog is acutely ill or will develop symptoms. What matters is further clarification: the clinical picture, additional tests such as PCR, and monitoring relevant organ values give a much clearer picture than the titre alone.

Many dogs live symptom-free for years with regular veterinary check-ups, while some need ongoing medication. The decision about treatment and its intensity lies with the treating vet – and should never lead to a dog being given up prematurely, which would be professionally unjustified and distressing for the animal.

Returning to Germany: what you need to know

The long incubation period, ranging from months to years, is probably the most important point for anyone moving back to Germany with their dog from Mallorca. A dog that leaves the island healthy can show symptoms years later – far away from any sandfly. So let your German vet know from the outset that your dog comes from, or has lived in, an endemic area, so that leishmaniasis is considered early on in the case of unclear symptoms – many practices in Germany don't immediately think of a Mediterranean disease when faced with atypical symptoms.

Note: According to reports from trade media, canine leishmaniasis has been a notifiable disease in Germany since March 2026. For details on the exact implementation and responsibilities, the safest approach is to check with your German vet practice.

Zoonosis: assessing the risk to humans

Leishmania infantum can in principle also infect humans, with those affected mainly being people with weakened immune systems. What's crucial for the correct assessment: in humans too, transmission occurs via the bite of the sandfly – not through direct contact with an infected dog. The risk of transmission from dog to human is considered very low by experts. Anyone who is chronically ill themselves or has a weakened immune system and lives on Mallorca can discuss the topic, if needed, with a German-speaking vet locally – there's no need for alarmism, but a factual question is always appropriate.

Interesting for anyone curious about the local fauna: Leishmania parasites have also been found in wild geckos on Mallorca – although these are different Leishmania species from the ones affecting dogs, and they don't infect dogs in the same way. What it does show, above all, is that the genus Leishmania is more ecologically widespread on the island than many people assume.

Most common mistakes

  • Relying on a standard mosquito net, even though it often doesn't keep out the tiny sand fly.
  • Assuming that contact with other dogs in the park is risky – the real risk lies in the insect bite, not in contact with other dogs.
  • Doing only a single test shortly after arrival and taking it as final all-clear.
  • Neglecting the dusk hours in everyday life, even though that's exactly when the greatest risk lies.
  • Not informing the new vet about the dog's origin from an endemic area when returning to Germany.
  • Giving up a dog too hastily because of a positive titre, without waiting for the vet's assessment of the actual disease.

Checklist: Leishmaniasis protection for your dog

  • Repellent (collar or spot-on) with a suitable active ingredient chosen in consultation with the vet
  • Dog kept mainly indoors during dusk and night hours
  • Fine-mesh nets on windows/doors checked during the summer half-year
  • First follow-up test scheduled 6–8 weeks after arrival/adoption
  • Second follow-up test scheduled due to the long incubation period
  • Local vet found for regular check-ups
  • When returning to Germany: new vet practice informed about the dog's origin

What comes next?

Leishmaniasis protection isn't a one-off project but a habit to maintain throughout your entire time on Mallorca. It makes sense to sync the rhythm of follow-up tests with the appointments you already have for vaccinations and worming treatments, so nothing gets forgotten. If you've just registered your dog on the island, you'll find further information in our guide Registering a dog Mallorca. And if you're still looking for a reliable practice, you'll find one in the Directory of vets on Mallorca.

Conclusion

Leishmaniasis in dogs is a real issue on Mallorca, but it's no reason to give up on life with a dog on the island. Anyone who understands that the sand fly – not contact with other dogs – is the real risk, who takes the dusk hours seriously, consistently uses a suitable repellent, and schedules regular follow-up tests, significantly reduces the risk. For adopted dogs with a positive titre, the rule is: stay calm, have it thoroughly checked, and work out a plan with the vet for monitoring and, if necessary, treatment – a positive result is a cause for attention, not a death sentence.

Official sources

For this specific animal health topic there is no central official source as there is for tax or registration obligations – the following specialist portals and editorial teams were reviewed for this guide:

For individual diagnosis and treatment decisions, only your treating vet on site is authoritative.

Can my dog catch leishmaniasis from other dogs?
In normal contact – such as playing, sniffing each other or sharing bowls – this is not, according to current knowledge, the usual route of transmission. The disease is overwhelmingly transmitted by the bite of the female sandfly.
How quickly does leishmaniasis show up after infection?
The incubation period can vary greatly and range from months to several years. So a dog can still fall ill years after leaving an endemic area.
What does a positive titre in my adopted dog actually mean?
A positive titre shows that the dog has been in contact with the pathogen and has produced antibodies – not automatically that it is acutely ill. Further diagnostics and a vet's assessment are needed to clarify the actual picture.
Is leishmaniasis curable in dogs?
No, the disease is considered treatable, but generally not curable. Treated dogs usually remain carriers of the parasite for life and need regular check-ups.
Do I have to have my dog tested before returning to Germany?
A test before the return journey makes sense, but because of the long incubation period it doesn't replace a later check-up. In any case, inform your new vet in Germany about the stay in an endemic area.
Can I, as a human, catch leishmaniasis from my dog?
Direct transmission from dog to human is considered very low. In humans too, infection occurs via the bite of the sandfly, with people with weakened immune systems being particularly affected.
Is a normal window fly screen enough protection?
Often not: sandflies, at around 2–3 millimetres, are so small that they can slip through standard coarse-mesh screens. Finer-mesh screens offer significantly better protection.
When is sandfly season on Mallorca?
Generally from May to October, peaking in the hot months of July and August. During this time, consistent protection is especially important.