- Rickettsia Tick Borne Disease in Dogs Rocky Mountain spotted fever is one of the most commonly known tick-borne diseases to affect dogs and humans. It belongs to a class of diseases known as Rickettsia; rod-shaped microorganisms that resemble bacteria, but which behave like viruses, reproducing only inside living cells.
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Rocky Mountain Spotted Fever is a disease caused by an infectious bacterium called Rickettsia rickettsii. It can only survive when it is within its host’s cells. Rocky Mountain Spotted Fever occurs in North, South, and Central America and is widespread throughout the Midwest, the Pacific Northwest and eastern United States, as well as east of Saskatchewan in Canada.
Rocky Mountain spotted fever (RMSF) is a disease of people and dogs caused by Rickettsia rickettsii. R rickettsii and closely related members of the spotted fever group of rickettsiae are in parts of North, South, and Central America. These pathogens are transmitted primarily through the bites of infected ticks.
- Symptoms and Types
- Living and Management
Certain breeds are more likely to develop a severe reaction to the R. rickettsii organism than others; these include purebred dogs and German shepherds. The signs and symptoms of Rocky Mountain spotted fever vary according to the type of disease the dog has. Most dogs will develop a fever within five days of contracting Rickettsia rickettsii. Other symptoms include: 1. Depression 2. Lethargy 3. Anorexia 4. Blood in the urine 5. Irregular heart beat (arrhythmia) 6. Discolored spots along the skin, often bruised or purplish in color 7. Inability to walk normally, loss of coordination (ataxia) 8. Swelling or edema (fluid retention) in the limbs 9. Bleeding that occurs suddenly, most often from the nose, or in the stools 10. Difficulty with blood clotting, which can lead to shock or death 11. Swollen lymph nodes 12. Pain in the eyes 13. Inflammation, hemorrhage, or conjunctivitis in the mucosal membranes, most commonly in the eyes
Tick-borne rickettsial disease is caused by the R. rickettsiimicroorganism. The organism is carried by ticks and transmitted through bite to a host animal. Most infections occur in the months from March through October.
You will need to give a thorough history of your pet's health, including a background history of symptoms, recent activities, and possible incidents that might have precipitated this condition. The history you provide may give your veterinarian clues as to which organs are being affected (e.g., heart, kidney). Your veterinarian will make the diagnosis based on blood tests and skin biopsies from the affected areas, along with the symptoms that are presented. A heightened antibody count will show that an infection is present. Special stains can be used in a laboratory setting to confirm a diagnosis.
Rocky Mountain spotted fever is a serious ailment that may result in fatality if your dog is not cared for properly. Treatment usually involves admitting your pet to an in-patient health facility where a health care team can monitor your dog until it shows signs of improvement. Your pet will be given antibiotics, the type will be based on your pet’s age, and proper hydration and fluid balancing will be checked. If your dog is found to have low red-blood cell counts, a condition known as anemia, or if there is a threat of developing a condition known as thrombocytopenia, where the platelets or substances in the blood become too low, a blood transfusion may be necessary to prevent these conditions from becoming life threatening. Your veterinarian will also monitor the amount of fluid in the dog's brain to prevent edema, or excessive swelling of tissues in the brain, body, and lungs. Along with the prescribed antibiotics, your dog may also require corticosteroid anti-inflammatory medic...
If you know your dog will be in an area that is tick infested, you will want to screen your pet for ticks and take precautions to prevent your pet from overexposure to ticks. Tick repellents and tick collars can be used, but checking your dog’s skin and hair for the presence of ticks is the most accurate way of preventing infection. Infection typically occurs after five hours. You will need to wear latex gloves and removeany ticks you find on your pet by hand, taking extra care to remove the mouth part of the tick. Your veterinarian may recommend the use of dips and sprays to help prevent further tick infestation. The type of repellent you use will be based on your dog’s age and health status. The prognosis for pets is usually good, provided you seek prompt and early care and treatment. If you seek help within the first few hours of infection, your pet will likely survive with no long-term consequences. If you do not take prompt action, however, it is likely that your pet may suffer...
Feb 16, 2017 · Rocky Mountain Spotted Fever is one particularly nasty tick-borne disease that affects both dogs and humans. Rocky Mountain Spotted Fever (RMSF) is caused the bacterium Rickettsia rickettsii. RMSF is transmitted through the bite of an infected tick. In North America, the types of tick usually associated with the disease are Dermacentor an d Rhipicephalus species; common names include Rocky Mountain wood tick, American dog tick and the brown dog tick.
- Jessica Vogelsang, DVM
Rocky Mountain Spotted Fever in Dogs. Rocky Mountain spotted fever is an illness caused by the bacteria Rickettsia rickettsii. The bite of infected ticks spreads it. Depending on the geographic area, several tick types can transmit the bacteria, including the American dog tick, the wood tick, and the brown dog tick.