Chronic Diseases in Kittens

Kitten and junior Cats, despite their apparent robustness and overflowing energy, can be vulnerable to various diseases. As an attentive owner, it is essential to recognize warning signs and act quickly. Discover the 11 most common diseases in kittens, their causes, symptoms, and treatments to effectively protect your little companion.

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1. Feline Coryza

Causes :

Coryza, often called cat flu, is a highly contagious disease mainly caused by two viruses: feline herpesvirus and feline calicivirus. Transmission occurs through direct contact between cats or via contaminated objects.

Symptoms :

  • Fever;
  • Frequent sneezing;
  • Nasal and ocular discharge;
  • Conjunctivitis;
  • Oral ulcers;
  • Loss of appetite;
  • General lethargy.

Treatment :

  • Antibiotics in case of bacterial superinfection;
  • Cleaning the eyes and nose with an appropriate solution;
  • Rehydration if necessary;
  • Appetizing and easy-to-eat food.

Prevention :

Vaccination is the best means of protection. A kitten carrying the virus will remain contagious for life, with risks of recurrence.

2. Feline Typhus (Panleucopenia)

Causes :

Typhus is caused by a very resistant parvovirus in the environment. This extremely contagious disease primarily affects unvaccinated kittens.

Symptoms :

  • High fever;
  • Violent vomiting;
  • Hemorrhagic diarrhea;
  • Rapid dehydration;
  • Deep lethargy;
  • Anorexia.

Treatment :

  • Hospitalization with infusion to combat dehydration;
  • Symptomatic treatment (anti-emetics, antibiotics);
  • Assisted feeding.

Prevention :

Vaccination is 100% effective and remains essential, even for indoor cats.

3. Feline Leukemia (FeLV)

Causes :

Leukemia is caused by the feline leukemia virus (FeLV), transmitted through saliva, blood, and maternal milk.

Symptoms :

  • Swollen lymph nodes;
  • Loss of appetite and weight loss;
  • Persistent fever;
  • Recurrent respiratory infections;
  • Anemia;
  • Tumors.

Treatment :

No treatment can completely eliminate the virus. Management aims to:

  • Treat the symptoms;
  • Strengthen the immune system;
  • Ensure a good quality of life.

Prevention :

A very effective vaccine exists and should be administered from 2 months old.

4. Feline Immunodeficiency (FIV)

Causes :

Feline AIDS is caused by a feline-specific retrovirus, transmitted primarily through bites during fights.

Symptoms :

  • Persistent fever;
  • Progressive weight loss;
  • Enlarged lymph nodes;
  • Recurrent infections (skin, mouth, eyes);
  • Chronic diarrhea;
  • Anemia.

Treatment :

As with FeLV, there is no curative treatment. Management consists of:

  • Treating secondary infections;
  • Maintaining good hygiene;
  • Adapting the diet.

Prevention :

Limit outings or create a secure space to avoid contacts with stray cats.

5. Calicivirus

Causes :

Viral infection due to feline calicivirus, highly contagious and primarily affecting the respiratory tract.

Symptoms :

  • Painful oral ulcers;
  • Purulent nasal discharge;
  • Sneezing;
  • Conjunctivitis;
  • Excessive salivation;
  • Limping in some forms.

Treatment :

  • Antibiotics to prevent secondary infections;
  • Painkillers;
  • Local care of ulcers;
  • Liquid food if necessary.

Prevention :

The calicivirus vaccination is included in the basic protocol for kittens.

6. Feline Chlamydiosis

Causes :

Bacterial disease caused by Chlamydophila felis, transmitted by direct contact between cats.

Symptoms :

  • Severe conjunctivitis;
  • Eye discharge;
  • Swollen eyelids;
  • Sneezing;
  • Nasal discharge;
  • Cough.

Treatment :

  • Specific antibiotics (tetracyclines);
  • Daily eye cleaning;
  • Prolonged treatment (3-4 weeks).

Prevention :

A vaccine exists and may be recommended for kittens living in groups.

7. Feline Infectious Peritonitis (FIP)

Causes :

Disease due to a mutation of feline coronavirus, primarily affecting young cats living in groups.

Symptoms :

  • Wet form: fluid accumulation in the abdomen;
  • Dry form: granulomatous lesions on various organs;
  • Persistent fever;
  • Loss of appetite and weight loss;
  • Jaundice;
  • Neurological disorders.

Treatment :

Until recently considered incurable, experimental treatments with antivirals (GS-441524) show promising results.

Prevention :

Limit stress factors and maintain good hygiene in multi-cat environments.

8. Ringworm

Causes :

Fungal skin infection
mainly caused by the fungi Microsporum canis or Trichophyton mentagrophytes.

Symptoms :

  • Circular hairless patches;
  • Red and scaly skin;
  • Itching;
  • Crusts and dandruff;
  • Broken hair.

Treatment :

  • Local and systemic antifungals;
  • Medicated shampoos;
  • Environmental treatment;
  • Long treatment (4-8 weeks).

Prevention :

Avoid contact with infected animals and maintain good hygiene.

9. Giardiasis

Causes :

Intestinal parasitic infection caused by Giardia, a protozoan transmitted by ingesting contaminated water or food.

Symptoms :

  • Recurrent diarrhea;
  • Soft and foul-smelling stools;
  • Weight loss;
  • Bloated belly;
  • Dull coat.

Treatment :

  • Specific antiparasitics (metronidazole, fenbendazole);
  • Disinfection of the environment;
  • Adapted diet.

Prevention :

Maintain good hygiene, especially of the litter box, and avoid stagnant water.

10. Pancreatitis

Causes :

Inflammation of the pancreas whose origin often remains unknown, but may be related to viral or bacterial infections.

Symptoms :

  • Severe abdominal pain;
  • Sudden loss of appetite;
  • Vomiting;
  • Lethargy;
  • Jaundice (in severe cases);
  • Fever.

Treatment :

  • Fluid therapy;
  • Analgesics;
  • Antiemetics;
  • Initial fasting then gradual reintroduction of food.

Prevention :

Avoid obesity and sudden dietary changes.

11. Feline Lyme Disease (Lyme Disease)

Causes :

Disease transmitted by ticks infected with the bacterium Borrelia burgdorferi.

Symptoms :

  • Fever;
  • Apathy;
  • Loss of appetite;
  • Joint stiffness;
  • Lameness;
  • Swollen lymph nodes.

Treatment :

  • Antibiotics (doxycycline) for 3-4 weeks;
  • Symptomatic pain treatment.

Prevention :

  • Regular coat inspections after outings;
  • Quick removal of ticks with a tick remover;
  • Preventive external parasite treatments.

How to Protect Your Kitten?

Prevention remains the best weapon against these diseases. Here are some essential tips:

  • Complete vaccination from 2 months old, with boosters according to the protocol recommended by your veterinarian;
  • Regular deworming, about every 3 months;
  • External parasite treatments adapted to the kitten's age and weight;
  • Preventive veterinary visits at least once a year;
  • Balanced diet adapted to the kitten's age;
  • Rigorous hygiene of the environment and accessories;
  • Limiting contact with stray or unvaccinated cats.

When to Seek Emergency Care?

Certain signs should alert you and require a quick veterinary consultation:

  • Refusal to eat for more than 24 hours;
  • Persistent vomiting or diarrhea;
  • Unusual lethargy or weakness;
  • Difficulty breathing;
  • Fever;
  • Dehydration (skin remains pinched when pinched);
  • Sudden behavioral changes.


Don't wait for your kitten's condition to worsen! The sooner a disease is managed, the better the chances of recovery. Your veterinarian remains your best ally to ensure the health and well-being of your little companion. By following these tips and staying attentive to warning signs, you will offer your kitten the best chances to grow up healthy and become a happy cat.

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