Canine giardiasis: symptoms, transmission and treatment

The canine giardia is a parasitic disease of occurrence worldwide that deserves attention for causing gastrointestinal changes in dogs, mainly diarrhea. In addition to circulating between animals and remaining in the environment, some types of the disease-causing protozoan have the potential to transmit to humans. Another challenge of giardiasis in dogs is the possibility of reinfection, especially when the treatment is not accompanied by the necessary care with the environment.

The infection is caused by the protozoan Giardia duodenalis, also known as Giardia intestinalis or Giardia lamblia. The parasite multiplies in the small intestine and attaches to the surface of the intestinal cells, compromising digestion and absorption of nutrients. This process can lead to gastrointestinal changes, such as diarrhea, and lead to weight loss when the picture prolongs.

What is giárdia canina?

The canine giardia is an intestinal infection caused by the protozoan Giardia duodenalis, which can impair the digestion and absorption of nutrients. The protozoan is a microscopic organism that multiplies in the intestine and attaches to the surface of intestinal cells. This action can compromise the digestion and absorption of nutrients, causing gastrointestinal changes such as diarrhea.

Diarrhea is the most common symptom, but infected dogs can also remain symptomless and contaminate the environment by stool. Therefore, even seemingly healthy animals can be sources of infection for other dogs and for humans.

Symptoms of Giardia in Dogs

Diarrhea is the most common sign of giardia in dogs, which can arise suddenly, persist or improve for a while, and then return. The stool can become soft or liquid, with mucus and strong smell. In more intense cases, apathy and dehydration may occur.

The appearance of the stool does not allow to identify the giardia with the naked eye. Mucus, bad smell and even blood can occur from other causes, which also need to be investigated, such as gastroenteritis in dogs. If your dog has persistent or recurrent diarrhea, seek veterinary evaluation to investigate the cause before starting any treatment.

Weakened puppies and dogs require special attention. In the presence of repeated vomiting, prostration or signs of dehydration, seek care without delay.

How does transmission occur?

The dog becomes infected by ingesting parasite cysts, present in water, food, soil or objects contaminated by feces. Cysts are a resistant form of the protozoan, eliminated in the feces of infected animals and able to remain in the environment. This can happen during a walk, by drinking water from a contaminated source or by licking paws and dirty hair. Eating stool is a possibility, but it is not necessary for infection to occur.

Transmission of the dog to humans is possible, but considered rare. Washing hands after contact with contaminated stools and objects helps reduce exposure.

Diagnosis and treatment

The diagnosis depends on veterinary evaluation and tests, which may require samples collected on different days. The appearance of stool does not confirm giardia, so only a professional can safely identify the infection.

Treatment may include prescription medications and hydration care, accompanied by hygiene of the coat and the environment to reduce the risk of reinfection. Vermifugation in the day does not prevent the dog from contracting giardia. Offering água segura, collecting stools quickly and sanitizing pet objects are fundamental care.

Prevention and care

To prevent canine giardy, it is essential to keep the environment clean and adopt hygiene measures. Collecting stools quickly, washing pet objects and offering água segura are practices that reduce exposure to the parasite. In addition, washing hands after contact with contaminated stools and objects helps decrease the risk of transmission to humans.

If your dog has persistent or recurrent diarrhea, seek a veterinarian for proper assessment and diagnosis. Proper treatment, combined with environmental hygiene, is the best way to control infection and prevent reinfection.

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