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Infectious Diseases

  • Babesiosis is a tick-borne infection due to Babesia protozoal parasites. The disease primarily spreads through an infected tick's bite, but direct animal-to-animal transmission may also occur. Dogs typically present with the acute and severe form of babesiosis, characterized by abnormal dark urine, fever, weakness, pale mucous membranes, depression, swollen lymph nodes, and an enlarged spleen. The disease can be transmitted to humans through a tick bite.

  • Bacterial pneumonia is an inflammation of the lung, usually caused by a bacterial or viral infection, but can be caused by inhalation of an irritant. Typical signs of bacterial pneumonia include fever, difficulty breathing, lethargy, and coughing. As these can also be caused by other diseases, diagnostics include a full physical exam, blood work, and radiographs, and may also require bronchoscopy or tracheal lavage to collect samples for cytology and bacterial culture and sensitivity. Treatment includes the use of one or more antibiotics that ideally would be selected using the results of a culture. Affected dogs may also require hospitalization and supportive care including intravenous fluids. The prognosis depends on the severity of the disease and whether there are any predisposing factors.

  • Dogs appear to be more susceptible to blastomycosis than many other species. The blastomycosis fungus seems to target the respiratory tract, although it may spread throughout the entire body. Cytology and/or histopathology are required to diagnose blastomycosis conclusively. Itraconazole is the preferred drug of treatment for most dogs. Prognosis is good for many cases of blastomycosis infection with recovery rates between 50-75%.

  • Cats are exposed to botulism by eating raw meat or dead animals containing botulinum toxin produced by Clostridium botulinum. Botulism causes ascending paralysis of the nervous system. Clinical signs are reviewed as well as diagnostic tests and treatment. Prognosis is guarded depending on the amount of toxin ingested and the degree of supportive care available. There is no vaccine.

  • Dogs are exposed to botulism by eating raw meat or dead animals containing botulinum toxin produced by Clostridium botulinum. Botulism causes ascending paralysis of the nervous system. Clinical signs are reviewed as well as diagnostic tests and treatment. Prognosis is guarded depending on the amount of toxin ingested and the degree of supportive care available. There is no vaccine.

  • Brucellosis is a contagious bacterial infection that can cause a number of reproductive problems, including infertility and abortion in breeding dogs. Male dogs infected with brucellosis develop epididymitis, an infection of the testicle. Female dogs infected with brucellosis develop an infection of the uterus. The infection is usually diagnosed by a blood test (rapid slide agglutination test). Treatment with antibiotics is not significantly effective and infected dogs should be removed from the breeding population. In the United States, brucellosis is a reportable disease.

  • Campylobacteriosis is a bacterial intestinal infection usually acquired by exposure to raw meat, poultry, or infected water, but can be spread between pets and humans. Signs of infection are watery or mucoid diarrhea with straining, possible cramping, lethargy, and fever. Testing, treatment and prevention are discussed.

  • Canine coronavirus (CCoV) is not the same virus as SARS-CoV-2, which causes COVID-19. Canine coronavirus disease, known as CCoV, is a highly infectious intestinal infection in dogs, especially puppies. CCoV does not affect people, and causes gastrointestinal problems as opposed to respiratory disease. Crowding and unsanitary conditions lead to coronavirus transmission. This article discusses signs, treatment, and vaccines for this disease.

  • Kennel cough is the common name for an infectious respiratory disease that affects the trachea and lower airways in dogs. Viral or bacterial pathogens may cause it. Treatment may or may not be necessary with antibiotics and, in some cases, anti-inflammatory medication. There are no long-term effects from this infection.

  • Canine influenza is a relatively new, highly contagious virus that causes respiratory disease in dogs. It has been reported in all US states and some Canadian provinces. Clinical signs include coughing, runny nose, and fever. Definitive testing can be performed in the early stages of the disease. Vaccination is recommended for dogs at a higher risk of infection or morbidity. The virus is not spread to humans, but cats can become infected.