Sepsis is a form of blood poisoning that is usually characterized by advanced illness resulting from uncontrolled infection, where there is systemic manifestation of the body's various inflammatory responses. It occurs when harmful microorganisms, usually bacteria, enter the blood and stimulate an intense immune response that ultimately causes widespread damage to body tissues. It may involve multiple organs and systems, potentially leading to organ failure and death if timely intervention is not performed. The disease can result from infection in many organs of the body, such as the lungs, urinary tract, abdomen, and skin. As a rule, sepsis is the body's overwhelming response to a potentially fatal infection; it is a series of biochemical and physiological events that, if not controlled, can lead to severe consequences.
Blood poisoning, or sepsis, begins with an infection that crosses the bloodstream barrier. The immune system must fight the invasion of dangerous pathogens into the body. Upon realizing it has been infected, the immune system goes into war mode and sets bodily processes in motion against the threat. But this regulation goes out of control in sepsis, in which there is no longer any balance between the host response and the infectious agent. Rather, it is now an over-, excessive-response by the immune system throughout the body. The result can be a complete abnormal inflammatory response over the entire body, which partly damages tissues, partly causes blood vessels to leak into body tissues, and partly reduces blood pressure to very low levels in a process defined as septic shock.
Most of the time, sepsis is caused by bacteria, but other pathogens can also be involved - including fungi, viruses and parasites. As a result, the infection initially occurs in a specific part of the body, but within the next few minutes, severe sepsis develops as a result of activation of the blood or bloodstream; this creates a systemic response that is the sepsis response. Sometimes, this overactive immune response can cause the body's most agile systems to mistakenly turn inward and tear apart its tissues. The result is that the functioning of vital organs such as the heart, kidneys, liver and lungs is impaired. Sepsis can independently progress to one or more organ failures, making the clinical concept more complex.
Also, sepsis occurs when individuals such as the elderly and the very young become infected with the organism, as at other times in chronic diseases associated with diabetes, cancer or liver disease. Medical conditions that warrant hospital admission for surgical intervention or other illnesses will also predispose a person to sepsis, such as other factors that predispose a person to sepsis, such as recent infections, particularly in already vulnerable areas such as the lungs (pneumonia), urinary tract (urinary tract infection), or abdomen (appendicitis or peritonitis), as well as open wounds or injuries that allow bacteria to enter the body.
Depending on the strength of the infection involved and the specific organ affected it varies how the symptoms of blood poisoning may manifest. However, the most common symptoms include fever, chills, rapid heart rate, rapid breathing, a confused or disorientated state and low blood pressure. In extreme cases, organ failure and difficulty breathing, decreased urine output and a change in mental status occur. This can lead to septic shock, in which there is a sudden drop in blood pressure resulting in multiple organ failure. Death occurs if not treated in time.
Blood poisoning can be caused by various infections. The most common causative agents are bacteria, which can be either gram-positive or gram-negative. Staphylococcus aureus, Streptococcus pneumoniae and Escherichia coli are among the bacteria most often associated with infections that cause sepsis. Sepsis can also be caused by mycoses such as the genus Candida and certain viral infections such as viral infection influenza. The treatment and severity of the condition is dependent on the organism involved.
Diagnosing sepsis is not straightforward, and involves a thorough assessment of the history and present symptoms as well as a physical examination. Blood tests have to be done to confirm the diagnosis, and again help identify the underlying cause of the infection. One of the most important markers in measuring the severity of sepsis is the lactate level in the blood, which indicates that there is tissue hypoxia. Other blood tests may include analysis of a complete blood count (CBC), blood cultures, and liver and kidney function tests that can help determine the source of infection for possible treatment.
Since sepsis is a critical component, its immediate identification and treatment is required for the best possible outcome. Management of blood poisoning is intravenous antibiotics that are specifically used against the organism. The type of antibiotic depends on the suspected specific organism infecting the host; most broad-spectrum antibiotics are also given initially before specific identification. The most severe cases may sometimes require ICU care, including mechanical ventilation for respiratory failure, dialysis for kidney failure, and drugs to stabilize blood pressure.
In addition, other treatments may also be needed depending on the patient's condition. Fluid resuscitation is an essential part of the management of sepsis, as the body loses fluids due to leakage in blood vessels in sepsis. Vasopressors, which are drugs that constrict blood vessels and increase blood pressure, may also be given to counteract the drop in blood pressure that occurs as a result of septic shock. Surgery may be necessary to drain abscesses or remove tissue infected with bacteria if sepsis has caused infection at a specific site.
Most prevention of sepsis involves preventing the infections that cause it. Proper hygiene is observed in hygiene, for example, regular washing of hands. Vaccination from certain infections, for example, pneumonia, influenza, and meningitis, will reduce the risk of pathogen entry and therefore reduce the likelihood of sepsis. Individuals with chronic illness or low immunity should take extra care to avoid infection. In a health care facility, stringent infection control measures such as using sterile techniques during medical procedures will reduce the likelihood of sepsis in high-risk patients.
Sepsis is a medical emergency, and the best thing anyone can do is to seek medical care immediately if they notice any symptoms. The prognosis for a patient with sepsis depends on factors such as promptness in reporting for treatment, the patient's health status prior to the illness, and the extent of organ dysfunction. Most people recover from sepsis if it is caught early and treated properly. People who go into septic shock or whose organs fail have a very low chance of survival, and may continue to have long-term deficits in the form of organ damage or chronic health problems.
Blood poisoning (sepsis) is a serious and often fatal condition caused by the body's excessive and widespread response to infection. The condition results in widespread inflammation, organ failure, and often septic shock. Early diagnosis and treatment are the keys to better survival chances; prevention practices, including vaccinations and infection control, will also play an important role in preventing sepsis. A friend of mine recently underwent lung surgery. He was carefully monitored and cared for by his family members, and their support proved crucial to his recovery. Unfortunately, sepsis can happen to anyone, but certain groups are at higher risk. Those people include those with weakened immunity and those with chronic illnesses, which make them more likely to develop infections. As research efforts in medical science increase, the opportunities to understand and better treat sepsis increase, leading to better outcomes for individuals suffering from it.
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