A tick-borne fever! Let's learn about Rocky Mountain Spotted Fever

Have you ever been out walking in the woods, in tall grass, or playing with your pet and come across a tiny tick-like creature? Sometimes these little creatures can be a real nuisance. Today we are going to talk about a disease that can be transmitted by ticks, and it can be a bit dangerous. It is called Rocky Mountain Spotted Fever. The name may not seem relevant to Sri Lanka, but it is very important to be aware of tick-borne diseases like this.

What is Rocky Mountain Spotted Fever?

Simply put, Rocky Mountain Spotted Fever (RMSF) is a disease caused by a bacteria called Rickettsia rickettsii. It is spread through tick bites. The initial symptoms – such as fever, headache, and skin rashes – can be similar to other common illnesses. But if not treated promptly, RMSF can be life-threatening.

This disease, RMSF, belongs to a larger group of diseases called `Spotted Fever Rickettsiosis (SFR)`.

Are Rocky Mountain Spotted Fever (RMSF) and Lyme disease the same thing?

Yes, although both are tick-borne infections, Rocky Mountain Spotted Fever and Lyme disease are two different diseases. Lyme disease is caused by a different bacteria than RMSF, and the symptoms are different. Someone who has RMSF will not develop Lyme disease.

Who can get Rocky Mountain Spotted Fever (RMSF)?

Anyone who is in an environment where ticks are present – ​​such as tall grass, forested areas, or outdoor pets – can get the disease. RMSF cases have been reported in the United States, Canada, Mexico, and South and Central America. Although cases can occur any time of year, the highest number of cases are seen during the warmer months.

Who is most at risk?

Anyone can get RMSF at any age. However, it is reported to be more common in men and people over the age of 40. You are at higher risk of developing severe RMSF if you:

• If you are under 10 years old or over 70 years old.
• If you have `Glucose-6-phosphate dehydrogenase (G6PD) deficiency`.
• If you have a compromised immune system.

How common is Rocky Mountain Spotted Fever (RMSF)?

In the United States, about 6,000 cases of RMSF are reported each year. Despite the name "Rocky Mountain," it is actually most common in states like North Carolina, Tennessee, Missouri, Arkansas, and Oklahoma. RMSF is more likely to occur during the summer, when ticks are more abundant and people are more outdoors.

How does Rocky Mountain Spotted Fever (RMSF) affect my body?

The bacteria that causes RMSF, `R. rickettsii`, enters your bloodstream through a tick bite. The bacteria then attacks your blood vessels, muscle cells, and tissues. This can cause blood to leak from your blood vessels, fluid to accumulate in your tissues, and damage your muscles, nerves, and organs.

What are the symptoms of Rocky Mountain Spotted Fever (RMSF)?

If you are bitten by an infected tick, you may start to develop symptoms of RMSF within two days to two weeks. Symptoms usually develop gradually over several days. They may initially include fever, headache, nausea, vomiting, and muscle aches .

Most importantly: Some people will develop a rash within three days (about 50%). However, it is important to seek treatment without waiting for the rash to appear.

The main symptoms of RMSF are:

• High fever
• Headache
• Appetite
• Muscle pain or soreness
• A skin rash – usually starts on the wrists and ankles and spreads to other parts of the body.
• Nausea and vomiting
• Stomach ache
• Sensitivity to light (photophobia)

Severe symptoms that may occur later:

• Confusion
• Difficulty breathing (dyspnea)
• Anxiety, restlessness, or agitation
• Seizures
• Numbness or weakness in the limbs

How is Rocky Mountain Spotted Fever (RMSF) spread?

Ticks carry and spread RMSF. In the United States, the American dog tick and the Rocky Mountain wood tick are the main vectors. In some areas, other tick species, such as the brown dog tick, can also spread RMSF.

Is RMSF contagious from person to person?

No, Rocky Mountain Spotted Fever is not contagious (that is, it is not a contagious disease).

How do you know if a tick is bitten?

If you don't see a tick on your body, it can sometimes be difficult to tell if you've been bitten by a tick. A tick may leave a mark where it was bitten, it may leave a rash, or it may go away without any symptoms at all.

How is Rocky Mountain Spotted Fever (RMSF) diagnosed?

Your doctor will diagnose RMSF based on a physical exam, your symptoms, and whether you've been bitten by a tick. Although blood tests and skin tests can help diagnose RMSF, the results of these tests are not available quickly enough to start treatment.

If you have traveled to an area where ticks are likely to be present in the past two weeks, even if you don't remember being bitten by a tick or having a tick on your body, be sure to tell your doctor. This is very important for them to decide whether to treat RMSF.

What tests are used to diagnose RMSF?

Your doctor can diagnose RMSF with blood tests and skin tests, but the results may take a while to come back. Your doctor will likely have to decide whether to treat RMSF before your test results come back.

• Blood tests: A sample of your blood is taken to check for the bacteria that causes RMSF. Your blood usually doesn't test positive for RMSF until 7-10 days after you get sick. You may need to have another blood test if your illness gets worse or after you've recovered.
• Skin tests: A special tool called a punch is used to take a small piece of skin from a sore on your skin (this may feel like a prick or a slight tingling sensation). The skin sample is then tested for signs of the R. rickettsii bacteria.

How is Rocky Mountain Spotted Fever (RMSF) treated?

RMSF is treated with antibiotics , which are usually taken for 7 to 10 days.

Treatment is most effective if you start treatment within five days of your symptoms starting. If you start antibiotics too late, RMSF can damage your body and cause life-threatening complications.

If you develop complications, you may need additional treatment. This may include a blood transfusion, mechanical ventilation, or other treatments.

What medications are used for RMSF?

Doxycycline is the only antibiotic recommended for treating RMSF. If you are allergic to doxycycline , your doctor may give you chloramphenicol as an alternative. However, chloramphenicol is hard to find in some countries, and it is not as effective for RMSF as doxycycline .

How to manage RMSF symptoms?

If your symptoms are not severe, you may be able to manage them at home with over-the-counter medications. However, it is important to ask your doctor which medications are safe to use.

How quickly will I recover after treatment for RMSF?

If you start antibiotics as soon as your RMSF symptoms start, you should feel better within 48 hours. However, you will need to take antibiotics for a few more days. Even if you feel better, continue to take all medications as prescribed. If your symptoms do not improve, see your doctor right away.

How can I reduce the risk of Rocky Mountain Spotted Fever (RMSF)?

Avoiding tick bites is the best way to reduce the risk of RMSF.

• Mow your yard regularly. Grass taller than 5 inches attracts ticks.
• When walking in forested areas, only use cleared paths.
• Use bug sprays that contain tick-repellent ingredients (for example, those containing DEET).
• When going into the woods or areas with tall grass, wear clothing that covers as much of your body as possible. Some clothing comes pre-treated to protect against ticks.
• Check your body for ticks after you come back from the outdoors. If possible, have someone else check areas you can't see (like your back or scalp).
• Protect your pets from ticks with treatments recommended by your veterinarian. Always check for ticks after they have been outside.

What can you expect if you develop Rocky Mountain Spotted Fever (RMSF)?

Most people recover from RMSF without any long-term problems if they receive treatment early after symptoms begin. Some people may develop complications that are severe enough to require hospitalization for treatment.

Even if you are healthy, sometimes long-term health problems can occur.

Complications of Rocky Mountain Spotted Fever (RMSF)

Even with antibiotic treatment, some people with RMSF can develop serious or life-threatening complications, including:

• Acute respiratory distress syndrome (ARDS)
• Acute kidney injury
• Pulmonary edema
• Anemia
• Heart disease
• Internal bleeding
• Sepsis (a condition similar to blood poisoning)
• Partial paralysis
• Inability to control the flow of stool (`fecal incontinence`) or urine (`urinary incontinence`)
• Gangrene requiring amputation
• Brain infection/inflammation (encephalitis)
• Organ failure

Outlook for RMSFs

The chances of recovery from RMSF are good if it is treated early. In the United States, the mortality rate from RMSF, even with treatment, is between 5% and 10%. In some countries, such as Mexico and Brazil, this percentage is much higher.

If you are severely ill with RMSF, you may have long-term effects even after you recover. For example:

• Nerve damage or paralysis
• Hearing loss
• Difficulty speaking
• Loss of vision
• Nervous system problems, such as balance problems or dizziness (vertigo)

Is Rocky Mountain Spotted Fever (RMSF) completely curable?

RMSF usually resolves with treatment. However, some people may continue to have symptoms even after the infection is gone, due to damage to nerves and tissues.

If left untreated, the chance of death from RMSF is between 20% and 30%.

Can RMSF occur more than once?

It is very unlikely that you will get RMSF more than once. Experts think that once you have had RMSF, you develop `immunity` to it. This means that your body knows how to fight it off, so it won't happen again.

How do I take care of myself if I have RMSF?

If your doctor is treating you for RMSF, make sure to take all of your medications as prescribed. If you stop taking antibiotics early, you may get sick again.

Your doctor will tell you how to best manage your symptoms at home. RMSF can get worse quickly. If you develop new symptoms or if your symptoms get worse, call your doctor right away.

When should you see a doctor about Rocky Mountain Spotted Fever (RMSF)?

If you have been bitten by a tick, or if you have been in an area where ticks are present and have symptoms of RMSF, see a doctor immediately.

Even if you've been bitten by a tick but don't have any symptoms, you don't need to see a doctor yet - taking antibiotics without being sick won't help prevent RMSF.

When should I go to an Emergency Treatment Unit (ETU) ?

If you have any of these symptoms, go to the nearest emergency room:

• If the fever is higher than 39.4 Celsius (103 Fahrenheit)
• If you cough up blood
• If your hands or feet are swollen
• If you have a severe stomach ache
• If you have confusion or other mental changes
• If seizures occur
• If you have numbness or weakness in your limbs
• If you are vomiting heavily

What questions should I ask my doctor?

• How should I take my medicine?
• What new or worsening symptoms should I watch for?
• How quickly will I get better?
• When should I come see you again?

Things to Remember (Take-Home Message)

Ticks aren't just annoying - their tiny bite can make you very sick. The best way to prevent Rocky Mountain Spotted Fever (RMSF) is to avoid being bitten by ticks. However, if you've been bitten by a tick and you have symptoms, see your doctor right away. Early treatment is the best way to get well soon. Take care of your health and stay safe!

` Ticks, Rocky Mountain Spotted Fever, Fever, Skin Rashes, Bacterial Infection, Tick Protection, Antibiotics