The symptoms of sepsis in elderly

What Is Septic Shock?

Septic shock is the most severe level of sepsis, a life-threatening medical emergency that occurs when the immune system has an extreme response to an existing infection.

When this happens, the immune system releases chemicals into the bloodstream that attack the body’s own tissues. Blood pressure drops dangerously low, potentially causing organ failure.

close-up of surgeons hands making an incision in a patient

Steps Leading to Septic Shock

Typically, the body responds to an infection by keeping it where it started. But if an infection cannot be contained to that original site, it can spread to other areas of the body via the bloodstream.

Most infections that lead to sepsis and septic shock are caused by bacteria.

When bacteria from one area of the body enters the bloodstream, it is known as bacteremia or septicemia. Unless treated quickly, this can progress into sepsis.

In a typical infection, your immune system releases cytokines to dilate blood vessels at the infection site. This response allows more blood to bring infection-fighting white blood cells to the area.

Causes of Septic Shock

Sepsis can start with almost any type of infection, ranging from minor infections like an abscessed tooth or athlete’s foot, to serious infections like meningitis, which affects the membranes of the brain and spinal cord.

The infection most commonly begins with one of the following:

  • Pneumonia, an infection of the air sacs in the lungs
  • Urinary tract infection
  • Bacterial infection in a cut or wound
  • Gastrointestinal tract infection, such appendicitis or E. coli

Septic shock can also be a complication of fungal infections, such as yeast infection, or viral infections, such as the flu or COVID-19.

You can’t pass sepsis along to someone else, but you can spread infections that may lead to sepsis and septic shock.

In sepsis, however, cytokines go into overdrive, creating an overwhelming amount of inflammation throughout the body. This “cytokine storm” damages the heart and its ability to pump blood throughout the body.

Sepsis worsens into septic shock when blood pressure plummets as a result. Blood then stops reaching organs, potentially leading to multiple organ failure.

Infection After Surgery

Sepsis and septic shock are more common after surgery for several reasons. First, urinary tract infections are more common after surgery, and these infections can lead to sepsis.

Second, while an incision made during surgery is obviously needed to allow the surgeon to work, it can also serve as an open door for bacteria or other microorganisms.

Surgery also takes a toll on the body and weakens the immune system. Even if the procedure is minor, there is a risk of infection.

Risk Factors

Infection is the primary risk factor for septic shock, and anyone can get one. That said, the following people are at greater risk:

  • Adults ages 65 or older
  • Children under age 1
  • People who have had sepsis before
  • People with weakened immune systems. They are more likely to contract an infection, which increases their risk of sepsis.

Chronic medical conditions that weaken the immune system, and thus increase your risk of sepsis, include:

  • Diabetes
  • Cancer
  • Lung disease
  • Kidney disease


As much as 70% of people who go into septic shock do not survive. Given how quickly sepsis can worsen, approximately 40% of patients with septic shock die even with treatment.

Your chances of survival improve significantly when you get medical attention within the first six hours after you notice symptoms of sepsis, which is why knowing what they are is so important.

Symptoms of sepsis and septic shock can include:1

  • Confusion or disorientation
  • Intense pain or discomfort
  • Fever, shivering, or feeling very cold
  • Shortness of breath
  • Clammy or sweaty skin
  • Fast heart rate

If you have any signs or symptoms of sepsis or septic shock, especially if you have a known infection, seek immediate medical attention.

Likewise, if you recently had surgery, closely monitor your incision for signs of infection including pus, redness, or swelling. Go directly to the hospital if you develop a fever or painful urination.

While rare, it is worth noting that septic shock can attack the young and the healthy. It is not uncommon for someone to seem completely well and normal one day and be incredibly sick with septic shock 48 hours later.


There are physical changes that a healthcare provider can check for to help diagnose septic shock. These include:

  • Fever, a body temperature above 100.4 degrees F
  • Hypothermia, a body temperature below 96.8 degrees F
  • Low blood pressure
  • High heart rate
  • Difficulty breathing

In addition, your healthcare provider may run blood and urine tests to check for signs of infection and determine the type. Certain tests can reveal whether or not your organs are functioning as they should.6

A critical tool for diagnosing sepsis in its earliest stages is the procalcitonin (PCT) blood test. PCT is a protein that rapidly increases in the blood as a bacterial infection spreads. Doctors can use the PCT test to see how widespread an infection is.

The PCT test is also important because it shows doctors whether or not antibacterial drugs are an appropriate treatment. While bacterial infections cause high PCT results, viral and fungal infections cause a very low PCT count.

You may also need imaging tests, such as X-rays or computed tomography (CT scans), especially if the source of infection is unclear.


Treatment takes place in a hospital. You may be admitted to the intensive care unit (ICU).

Antibiotics should be given within one hour of your arrival at the hospital. Diagnostic tests will be ordered to confirm an infection and its type, but results can take at least 48 hours to come back. The pros of immediate treatment far outweigh any risks.

Antibiotic medications are administered directly into the vein (intravenously) so that they enter the bloodstream immediately. A 2019 survey on antibiotic use in sepsis found that intravenous antibiotics are most commonly given for a duration of seven to 10 days.

If diagnostic tests come back showing a different kind of infection, however, you may be switched from an antibiotics to antifungals, antivirals, or other targeted treatments as appropriate.

Regardless of infection type, you will be given IV fluids to prevent blood pressure from dropping. You may also be given vasopressor medications, which tighten blood vessels to help raise blood pressure.

Should you have difficulty breathing, you may be placed on a ventilator, also known as a respirator or breathing machine.

When Surgery May Be Needed

Surgery may also be recommended after initial antibiotic treatment to remove tissue or amputate a limb damaged by sepsis. Surgery ensures any damaged tissues are gone and you are infection-free. It also helps you maintain as much mobility as possible.

The thought of even potentially losing a limb is startling. It may help to know that only an estimated 1% of sepsis survivors need to have one or more surgical amputations. These typically happen within the first 36 hours to 90 days after sepsis begins.

The symptoms of sepsis in elderly

Bottom Line

Sepsis is a very serious condition. Elderly people, especially those with other health problems, are at additional risk for harmful complications of sepsis.

Again, if any of the symptoms listed are present and the person also has an infection, see a doctor right away. The faster that the person with sepsis is treated, the better the chances are for recovery.

The symptoms of sepsis in elderly

Septic Shock

If sepsis has become worse, the person may develop “septic shock,” which is defined as low blood pressure that does not respond to treatment.

The symptoms of sepsis in elderly

Additional Symptoms

The above symptoms guide the doctors when trying to determine if the person has sepsis. However, depending on what caused the infection and how long it has progressed, the following symptoms can also be present:

  • Weakness
  • Chills, which may even cause shaking
  • Confusion
  • A blue, mottled or “dusky” color to the skin
The symptoms of sepsis in elderly

What Are the Symptoms of Sepsis?

The first clue that someone might have sepsis is if they have a known or suspected infection. If the infection is present (even if it is being treated) and the following symptoms occur, it is time to take action and see a doctor immediately.

If you are at home, the following symptoms are easily measured.

According to diagnostic criteria, person needs to have at least two of the following symptoms for sepsis to be strongly suspected. However, in elderly people, the presence of one of these symptoms warrants a call to the doctor:

  • Tachycardia: This means the heart is beating faster than normal. A heart rate over 90 beats per minute is considered “tachycardia” in the elderly. To measure heart rate, have the person sit still for a couple of minutes before starting to count beats, using a stopwatch or watch with a second hand.
  • Abnormal Body Temperature: This means that the person either has a fever (above 100.4 degrees Fahrenheit) or low body temperature, called “hypothermia” (lower than 96.8 degrees Fahrenheit).
  • Rapid Breathing: This is defined as more than 20 breaths per minute while the person is sitting still.

In addition to the above symptoms, a healthcare provider will also suspect sepsis if they find that the patient has:

  • Reduced PaCO2 Level: This means partial pressure of carbon dioxide in arterial blood.
  • Abnormal White Blood Cell Count: This is a white blood cell count that is either high, low, or composed of greater than 10 percent band cells.
The symptoms of sepsis in elderly

Sepsis of Symptoms in the Elderly

Sepsis is a serious systemic response to an infection. Basically, the entire body is experiencing an inflammation response.

“Blood poisoning” or “septicemia” are terms that are also used by some to refer to sepsis, although they really mean that is an infection in the bloodstream, while “sepsis” describes the response to that infection.

Sepsis is an extremely dangerous condition, requiring urgent medical attention.

Each year, about 90,000 people in the US die from septic shock. Elderly people account for 65 percent of sepsis cases –- people over 65 are 13 times more likely to have sepsis than younger people.