Contagion and symptoms of canine neosporosis

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Canine neosporosis is a parasitic disease that gets its name from the protozoan Neospora caninum that causes it. Among dogs, it will affect especially puppies.

It is characterized by neuromuscular symptoms that usually cause paralysis that begins in the hind legs and can progress. It is a pathology that even becomes fatal, hence the importance of going to the vet and starting treatment soon.

Index of contents

  • 1 What is neosporosis?
  • 2 The Neospora caninum cycle
  • 3 Neosporosis symptoms in dogs
  • 4 How is neosporosis transmitted?
  • 5 Which dogs get neosporosis?
  • 6 How is neosporosis diagnosed?
  • 7 What is the treatment of neosporosis?
  • 8 Neosporosis prognosis

What is neosporosis?

Neosporosis is a pathology that causes a parasite, specifically a protozoan called Neospora caninum. In order to survive, it must lodge inside the cells of the animals it parasites, which are mainly dogs, but also cattle. This is important to keep in mind for prevention.

At first it was treated as a new genus of coccide, which was also found in dogs, hence its name. The discovery occurred specifically in puppies that manifested paralysis and finally death.

But soon it was also discovered in cattle. The neospore has a preference for attacking the central nervous system, hence the typically neurological and muscular symptoms.

The Neospora caninum cycle

Today, it has been established that the definitive host animals of the neospore are dogs, coyotes, dingoes, and gray wolves. But it is also known that, in order for this protozoan to complete its life cycle, it needs the presence of the so-called intermediate hosts.

They are ruminants, wild ungulates, rodents, and birds. When a dog is infected by the neospore it eliminates the parasite in its feces. In this way, contamination reaches the waters, pastures or the beds that are put on livestock.

This is how contagion occurs. In turn, if a dog consumes any contaminated product from livestock or any other intermediate host, such as a placenta, it will become infested.

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Neosporosis symptoms in dogs

Neosporosis is not a very common disease. The sign that can make us suspect its presence is the hind legs paralysis. Although this symptom is common to other diseases, if these are ruled out and we are dealing with a young dog, neosporosis must be evaluated. Other symptoms such as the following may be detected:

  • Neuromuscular disorders that, in general, show a rapid progression.
  • In this area, the most common sign is paralysis of the hind legs, which will follow an ascending pattern.
  • Difficulty to swallow.
  • Paralysis of the jaw.
  • Flaccidity and muscular atrophy.
  • Heart failure.
  • Myocarditis or inflammation of the heart muscle.
  • Pneumonia.
  • Polymyositis or inflammation of muscle fibers and skin.
  • Increased liver size.
  • Seizures
  • Behavioral modifications.
  • Decay.
  • Anorexy.
  • Dermatitis, which is related to the immunosuppression suffered by the sick dog, although it is an infrequent symptom.
  • Sometimes neospore-bearing dogs will remain asymptomatic. These specimens could show the clinical picture described if, by any circumstance, their immune system is weakened.

How is neosporosis transmitted?

In addition to contact with water or contaminated remains, females can directly infect their puppies. It is not known exactly how this transmission occurs. The disease in dogs thus infected manifests itself more severely.

Which dogs get neosporosis?

All dogs are susceptible to contracting a neospore, but a higher incidence has been seen in children under one year of age. Those specimens in contact with livestock or with any of the other intermediate hosts will also present more risk.

How is neosporosis diagnosed?

Being a rare disease, other pathologies are usually considered before. Only when these are ruled out is the possibility of neosporosis considered. Other times, especially if the dog is considered to belong to a risk group or an ascending paralysis occurs, neosporosis can be directly suspected.

There is a quick test to confirm or rule out this parasite.. It is also common to perform a blood test to have general information on the state of the animal. Liver parameters may be altered.

What is the treatment of neosporosis?

To treat this disease, the veterinaryn will prescribe antiprotozoal drugs to eliminate the parasite. Antibiotics are also prescribed, especially to avoid opportunistic secondary infections.

There is no vaccine that can help in its prevention. To minimize risks, we can prevent the dog’s contact with intermediate hosts or potentially contaminated remains as much as possible.

Neosporosis prognosis

It is a treatable disease, but we must bear in mind that, despite the treatment, not all affected dogs manage to overcome it. Death occurs from respiratory, cardiac, or liver complications.

The prognosis will depend, to a large extent, on the moment in which the treatment is started. The characteristics of the damage that the neospore has already caused also influence. In general we can say that this is reserved.