Prompt treatment is important for preventing the most serious side effects of this disease, including both long-term effects and death. Unfortunately, early symptoms can be easily misdiagnosed as flu (especially in patients who don’t have a rash), delaying proper treatment and significantly increasing the risk of mortality. In fact, death can occur within the first eight days after symptom onset, even in otherwise healthy people. This makes early and accurate diagnosis critical; however, this is not without problems.
Because Rocky Mountain spotted fever is closely associated with the “spotted” rash that occurs in about 90% of patients, it is rarely suspected in those 10% who never develop a rash. And since many patients never realize they’ve been bitten by a tick, treating physicians fail to consider tick-borne illnesses as a possible cause of symptoms. Symptoms can also vary significantly from one patient to the next, making it difficult to zero in on RMSF as a specific and distinctly identifiable cause of symptoms. Finally, many physicians only consider the diagnosis of tick-borne illnesses during peak months of the year or in specific geographic regions where ticks are far more prevalent.
Diagnostic tests for RMSF often fail to produce positive results within the first week to 10 days of an infection – the period when treatment is most critical for reducing the risk of serious and long-term side effects and death.
As a result, doctors must rely on their own best judgment to ensure that treatment is initiated as early as possible – ideally within the first five days of symptom onset. If you develop symptoms, it’s also very important to make sure you let your doctor know about any contact you’ve had with wooded or grassy areas, even if you don’t recall being bitten by a tick. Also mention if you have been around dogs that may, in turn, have picked up ticks. Sometimes a blood test can yield clues like a low platelet count or unusual levels of liver enzymes that can help in determining a diagnosis. But if this disease is even suspected, treatment with doxycycline should begin right away to reduce the risk of serious and even fatal side effects. Once treatment is underway, additional comprehensive testing can be performed once the disease has progressed a bit to confirm the diagnosis of RMSF.
After antibiotic treatment begins, fever typically resolves within one to three days. However, people with severe infections may require much longer courses of antibiotics, including intravenous antibiotics to help the medication reach and maintain levels necessary for reducing fever and preventing more serious and long-term damage. In most patients, antibiotic treatment lasts for about two weeks.
Although it may seem like a good idea to have a preventive course of antibiotics if you’ve been bitten by a tick, the Centers for Disease Control and Prevention (CDC) has found no evidence that “pretreatment” with antibiotics can effectively prevent an RMSF infection. In fact, this could actually delay the disease’s onset and interfere with proper treatment. If you have been in areas with a large tick population, be on the lookout for symptoms that could indicate an infection and seek care right away.