Septic arthritis, also known as
infectious arthritis, is joint inflammation that is
caused by a bacterium, a virus or a fungus. It mainly
affects large joints such as the joints of the hips,
knees and shoulders but sometimes smaller joints may be
affected. Septic arthritis develops as a result of a
previous infection. It usually begins as an infection
which travels through the body and ends up in the joints
which causes an inflammation symptom. Septic arthritis
usually strikes only one joint but may strike more than
one. The duration of septic arthritis is short with
prompt treatment.
What are the symptoms of septic
arthritis?
A symptom of septic arthritis depends
largely on what germ is causing it. When septic
arthritis is caused by a bacterium, the inflammation
symptom normally comes on suddenly, is localized in one
area and causes fever and chills. In contrast, when
septic arthritis is caused by a virus, there is usually
no fever symptom but a general all-over achy feeling.
When the septic arthritis is caused by a fungus, there
may or may not be a fever symptom, the pain and
inflammation symptom can occur in one area or throughout
the entire body and appears slowly over several weeks or
months.
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How is septic arthritis diagnosed for
treatment?
Septic arthritis is diagnosed by a
physical exam, questions by your doctor about recent
illnesses, travel or contact with those who have
infections as well as symptoms. In addition, septic
arthritis can be diagnosed with x-rays and testing fluid
retrieved from the joint in order to determine which
germ is causing the infection. When a virus is the
suspected cause of septic arthritis, a blood test can be
done to find out if the patient has created antibodies
to the virus. If a fungus is the suspected cause of the
septic arthritis, the doctor will remove a piece of the
tissue and examine it for fungal infection. Other
disorders such as gout, rheumatic fever, Lyme disease,
and other forms of arthritis can mimic the symptoms of
infectious arthritis so you may need to see a specialist
in order to determine if you have septic arthritis.
What is the treatment for septic
arthritis?
The treatment for septic arthritis
involves draining the fluid in the joint to remove the
infection, anti-inflammatory medication, non-steroidal
anti-inflammatory drugs (NSAID’s), antibiotics,
anti-fungal medications, surgery, rest, taking in
fluids, and strength training exercises. When septic
arthritis is caused by a bacterium, antibiotics can be
given, when it is caused by a virus, only pain relievers
and anti-inflammatory drugs are given. When the septic
arthritis is caused by a fungus, anti-fungal drugs are
given over several months and these types of infections
are the most resistant to treatment and are most likely
to reoccur. Sometimes surgery is a necessary treatment
in order to remove the infection when other treatments
do not work. As the infection clears, movement can be
restored through regular strength training exercises.
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Who can get septic arthritis?
Anyone can get septic arthritis if they
get infected with a bacterium, a virus or a fungus. Both
men and women of any age can get septic arthritis.
People who work in the soil or with wild animals are
also more likely to get septic arthritis. People, who
have difficulty fighting infections such as people with
diabetes, AIDS, kidney disease, cancer, alcoholism,
sickle cell anemia, or IV drug users, are more likely to
get septic arthritis. People who have arthritis are also
more likely to get septic arthritis due to the greater
chance that joints weakened by arthritis can be infected
with a bacterium, virus or fungus. In addition, people
with arthritis often take medications which lower the
immune system and make the patient more susceptible to
septic arthritis. Septic arthritis is also more likely
in patients that have recently had surgery to replace a
joint because there is a chance that the joint can be
infected with germs when opened to the air.
What causes septic arthritis?
The most common cause of septic arthritis
is infection by a bacterium. The types of bacteria most
likely to cause septic arthritis are pneumococcus,
gonococcus, streptococcus, staphylococcus, hemophilus,
spirochetes or tuberculosis. Viruses such as mumps,
infectious mononucleosis and infectious hepatitis, can
also be the cause of septic arthritis. Bacteria and
viruses may be introduced into the body through the
nose, ears, eyes, or other openings as well as through
traumatic injury or tiny puncture wounds such as from a
nail or staple. These germs may also enter the blood
stream during routine dental procedures. The least
common cause of septic arthritis is fungal infections.
These infections often come from the soil, certain
plants like roses, and bird droppings. Septic arthritis
is not contagious but the initial infection which caused
the septic arthritis can be contagious. However, not
everyone who gets an infection will develop septic
arthritis.
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