bacteria are by far the most common infection-causing microorganisms several hundred species can cause disease in humans and can live and be transported through air, water, food, soil, body tissues and fluids, and inanimate objects. Sepsis is the condition in which acute organ dysfunction occurs secondary to infection.įour major categories of microorganisms cause infection in humans: bacteria, viruses, fungi, and parasites. Surgical asepsis, or sterile technique, refers to those practices that keep an area or an object free of all microorganisms it includes practices that destroys microorganisms and spores. Medical asepsis includes all practices intended to confine a specific microorganism to a specific area, limiting the number, growth, and transmission of microorganisms. Asepsis is the freedom from disease causing microorganism aseptic technique is used to decrease the possibility of transferring microorganisms from one place to another. Pathogenicity is the ability to produce disease thus, a pathogen is a microorganism that causes disease. Microorganisms vary in their virulence or their ability to produce disease, the severity of the diseases they produce, and their degree of communicability. A detectable alteration in normal tissue function is called disease. If the microorganism produces no clinical evidence of disease, the infection is called asymptomatic or subclinical. such a microorganism is called an infectious agent, or the source, a germ, a virus or other microbes. Infection is the growth of microorganisms in body tissue where they are not usually found. Learn about infection control in this guide for nurses. ![]() As such, the ones directly involved in providing a biologically safe environment are none other than the nurses. ![]() ![]() many organisms are harmless, others are lethal, some are a normal part of our body. Microorganisms exist everywhere: in water, in soil, and on body surfaces such as the skin, intestinal tract, and other areas open to the outside such as our mouth, upper respiratory tract, vagina, and lower urinary tract.
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