Diseases transmitted by cats and their symptoms


Did you know that responsible pet ownership is also related to your health? Of course, because the care you give your little animal will depend on whether or not he can transmit certain diseases that do not affect them, but only human beings.

An example of these diseases is toxoplasmosis, an infectious disease caused by the Toxoplasma gondii protozoan, an intracellular parasite that is transmitted from animals †“especially, felines — to humans through different routes of infection. It mostly affects the fetus (if you are pregnant) and also children, the elderly and people with immunological deficits, causing asymptomatic infections. To prevent, you must take care of the hygiene of your little animal, try not to directly touch its feces and ensure that it does not eat raw meat.

Approximately one in three people in the world are believed to be infected with Toxoplasma gondii, which has been linked to schizophrenia and behavioral changes, but often does not cause symptoms, since it hides in the brain and c Muscle cells, reported a study published this year in the United States.

"Scratch of the Cat"

Another of the ailments that can be transmitted by a pet †“and especially, felines- is the so-called" Spider's cat "disease, which usually occurs with greater force in hot weather, due to the increase in fleas and Ticks

Experts estimate that an adult female flea can lay up to 46 eggs daily, causing pets such as anemia, fever, decay, weight loss, apathy, allergies and changes in the coat.

And in humans, they can cause Cat's scratch: "The cat's flea acts as a vector for the bacterium Bartonella henselae, the cause of this disease," explains Patricio Moreno, veterinarian at Drag Pharma Laboratory. В Evil is contracted by contact with a cat that has fleas infected by this bacterium.

In Chile, 13.3% prevalences in healthy children and 10.3% in adults with occupational risk (Veterinarians and Veterinary Technicians). 90% of infected people have localized symptoms with persistent inflammation in the wound caused by the cat and inflammation of the regional lymph nodes near the wound. This picture can be prolonged for a maximum of 4 weeks, however, 10% of the cases present general commitment, with persistent fever, abdominal pain and even neurological involvement.

"The eggs and larvae of these parasites can be found in sofas, carpets, pet's house and particularly in the land," says Patricio Moreno. Therefore, when deworming the animal, a product must be applied together in the environment, using products specially formulated for it, such as Sinpul in solution or powder.

For the treatment in pets it is recommended to use an external antiparasitic product either in powder or spray, such as Fiprokill В Spray, which allows the control and prevention of fleas and ticks effectively and safely in dogs and cats.

In addition, it is recommended to check our pets when they return from walks, especially in the neck, behind the ears and between the fingers, places where ticks are most frequently housed.


The toxocariasis is a infection caused by a parasite that affects the cat, the Toxocaracati, a worm that lodges in the intestine. When the earthworm affects the human being, the disease is called visceral larva migrans.

The contagion is given by ingestion of infected feces for eggs This can occur due to improper cleaning of the cat's litter box and even manipulating the land where the pet defecates, so it mostly affects children. It is a dangerous disease, because the earthworm is able to migrate to different organs of the body, causing blindness when installed in the eye.

Your symptoms are:

  • Swelling of the liver
  • Fever
  • Swelling of the lymph nodes
  • Cough


Is a diseaseinfectious caused by the bacteria Campylobacter jejuni. It is transmitted to humans by various animals, including the cat, when the cat becomes a carrier of the bacteria.

Among its symptoms are:

  • Abdominal pain
  • Diarrhea
  • High fever
  • Cramps
  • Sickness


Much has been said about the toxoplasmosis as a disease that cats transmit to pregnant women. The truth is that, although the cat is not the only source of infection, it is also possible to acquire it by eating raw meat (which seems to be the reason in most cases), it is also possible that the cat infects it when their feces are handled without protection and the person does not wash their hands after cleaning the litter box.

The disease is caused by the parasite Toxoplasma gondii, which is distributed throughout the world. The presence of the parasite can be asymptomatic in cats and humans, although when it shows symptoms it is possible to appreciate:

  • Fever
  • Unjustified fatigue
  • Swollen glands
  • Muscle pain
  • Acne

Pregnant women who have been infected are at risk of having an abortion, while the presence of the parasite can cause blindness and deformations in the fetus. It is recommended to visit the veterinarian to perform the relevant tests and rule out or confirm the presence of this parasite.


The bites and the scratches of cats can cause infections if the wound is left open and unattended, as it becomes a focus for the penetration of bacteria. When this occurs, it presents:

  • Swelling of the area
  • Redness
  • Pain

Before a bite or scratch, the area should be washed immediately and remain alert. Without inflammation increases or does not give way, you should go to an emergency center for antibiotics.


The giardiasis is a infection produced by the parasite Giardia intestinalis. It is transmitted from cats to humans by contact with infected feces, in turn, the cat can contract the parasite by consuming contaminated food or water.

Although the presence of the parasite may be asymptomatic, it is also possible for the infected person to present:

  • Pestilent diarrhea
  • Sickness
  • Fatigue
  • Abdominal pain

Some people develop allergies when they are in the presence of cats, this happens because felines generate a protein called glycoprotein, to which many people are sensitive. When this occurs, it is appreciated:

  • Mucus
  • Sneezing
  • Swelling of the eyes
  • Cough

Although it is not a disease "transmitted" by felines, it is triggered by them.

Lyme's desease

Although the Lyme's desease is caused by the bite of tickIn some cases, infection between cats and humans is possible. The tick that transmits Lyme disease carries a bacterium belonging to the genus Borrelia, responsible for this medical condition.

Symptoms include:

  • Acne
  • Fever
  • Shaking chills
  • Fatigue
  • Headache

These are the symptoms that appear in the first stage of the disease. However, it continues to develop in the body of the human being for months or years, after which heart problems, meningitis, facial paralysis, hallucinations, arthritis, among many others begin to appear, as it is a chronic disease.


The ankylostomiasis is a bowel infection caused by the presence of the parasite Ancylostomaduodenale or for him Necatoramericanus. Cats are spread to humans due to contact with infested feces and penetration through the skin.

Your symptoms are:

  • Diarrhea
  • Fatigue
  • Inapetence
  • Anemia
  • Hemorrhages of the liver
  • Abdominal pain
  • Pharyngitis

When it comes to all these diseases, it is necessary to keep in mind that only a cat that does not receive adequate veterinary care will be able to transmit them. In addition, children under 5 years of age and people suffering from other diseases, especially those conditions that compromise the immune system, are more likely to contract them.

Diseases that transmit cats to dogs

Although cats and dogs belong to different species, there are some diseases that they share and that can be transmitted to each other. Next, we tell you what they are.

The internal and external parasites, guilty of many diseases, is the main thing that cats can spread to dogs. Although there are some species of fleas who prefer to parasitize dogs or cats, they can also jump to an animal of the other species when pets live together.

In addition to this, you should not forget internal parasites, worms and bacteria, such as nematodes, the hookworms and the tricocephalus, which are transmitted through feces, so that contagion occurs between dogs and cats that share the same spaces. This occurs mainly because dogs tend to ingest the feces of other animals, so if the cat is infected with any of these parasites, the infection is simple.

Similarly, it is also possible for dogs to become infected with toxoplasmosis, Rage (through open wounds or cat bites) and some types of scabies.

Diseases transmitted by stray cats

Stray cats are exposed to multiple diseases, as they are vulnerable to all types of bacteria, viruses and parasites and do not receive the necessary veterinary care. These are some of the diseases that can be transmitted.

The Rage It is caused by the virus Rhabdovirus and can be deadly to cats. A rabid cat bite is spread to humans and dogs, since the wound allows the virus to pass into the blood, is transmitted by Cats that have not been vaccinated.

Symptoms include:

  • Fever
  • Headache
  • Fatigue
  • Confusion
  • Muscle spasms
  • Aggressiveness
  • Hallucinations

If it is not treated on time, it can cause the death of the person.

The tub is a skin infection caused by parasites called dermatophytes. It is transmitted through contact with infected animals or with objects and places that the animal frequently frequent, as the fungus survives in those spaces.

It manifests as:

  • Scaly skin
  • Redness
  • Inflammation
  • Baldness in the affected area

Cat scratch disease

Did you know that there are diseases that transmit cats by scratches? One of them is scratch disease, which occurs when the cat is infected with the bacteria Bartonella henselae.

This disease produces:

  • Swelling in the affected area
  • Swelling of the lymph nodes
  • Redness of the skin
  • Fever
  • Decay
  • Headache

The scabies is a Skin illness produced by different ectoparasites, different subspecies of mites that affect felines and other species.

Because the disease is caused by different mites, some are transmissible from the cat to other species, while other types of scabies are not. The types of mange that can be transmitted are:

  • Ear scabies: It affects the ears of the cat and can be transmitted to dogs.
  • Demodectic mange: It affects the entire body and occurs in dogs and cats, so it can be transmitted from one species to another on some occasions.
  • Keiletielosis: also called walking dandruff, it is a type of scabies in which it is possible to observe the mites moving through the fur, which causes its name. Cats can transmit it to the dog and the human being.

In addition to these diseases, stray cats can also transmit parasites Y toxoplasmosis. However, although the aforementioned diseases are common in stray cats, a pet cat that does not receive the necessary veterinary care and leaves home frequently can also get them.


Any feline without veterinary care is able to be a carrier of these diseases and suffer the consequences of these, so we recommend you follow the following recommendations:

  • Vaccinate your cat against the main diseases and follow the recommendations of your veterinarian about the schedule of reinforcements.
  • Take your cat to a general medical checkup twice a year.
  • Check the fur of the cat in search of fleas, ticks or other unusual signs to attack diseases in time.
  • Prevent your cat from having contact with stray animals.
  • Wash your hands with soap and water after handling your pet and after cleaning his litter box and his bed.
  • Prevent small children from touching the cat's feces or cleaning the litter box.
  • Do not share foods with your cat or kiss it on the mouth.
  • Keep the spaces clean Where your cat sleeps and plays.

With these simple recommendations, you will be preventing many diseases.

This article is purely informative, at we have no power to prescribe veterinary treatments or make any kind of diagnosis. We invite you to take your pet to the veterinarian in case he presents any type of condition or discomfort.

If you want to read more articles similar to Diseases transmitted by cats and their symptoms, we recommend that you enter our section on bacterial diseases.


As you can see our feline friends can transmit more diseases than we think, so it is recommended:

  • Vaccinate our cat, even if it doesn't leave our home.
  • Check it sporadically to prevent any skin disease.
  • Always be attentive to any strange behavior.
  • If we have children be very cautious> I hope this article is very helpful, remember to leave your comment and / or suggestion below and we will gladly answer any questions, until a next post!

1. Parasites

As you know, Parasites are insects that live in the body of other animals because they need them to survive. The most common parasites in cats are intestinal worms, amoebas, solitary or tapeworm, pinworms, ister and giardia.

What is giardia? Giardia is a parasite that produces a disease called giardiasis, as it feeds on the intestine of the animal. It causes diarrhea, vomiting ... If left untreated, it can destroy the intestinal flora. It can affect many animals, such as dogs, cats and humans..

A very dangerous parasite that affects cats is the Echinococcus, a worm, when it affects humans, causes it to be called hydatid cyst and usually occur in organs such as the lungs or liver. It is transmitted when cats eat infected viscera.

7. “Cat scratch”

This disease is very common and cats spread it very easily.. It is a consequence of fleas and ticks, and as you could imagine, it is transmitted through scratches. Your symptoms are:

  • Blisters
  • Fatigue
  • Fever
  • Swollen lymph nodes near the scratch
  • General discomfort
  • Sore throat
  • Excessive weight loss
  • Lack of appetite

The diseases transmitted by cats

Cats, despite being great life partners, bring dangerous diseases that affect our health. Many of them they are transmitted by direct means, such as touching them or being scratched by them. But the truth is that there are different means of transmission of such diseases.

Among the forms of transmission is mishandling of your urine and feces. They house a high degree of bacteria and parasites that bring serious consequences to the human body. Other forms of transmission of diseases transmitted by cats include the airways.

The latter is fundamental, because this is where the great pandemics such as bird flu and even H1N1 circulate from person to person. Next, we will talk a little about three different diseases that cats transmit.