Examples of Opportunistic pathogen in the following topics:
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- Host-pathogen interactions are the interactions taking place between a pathogen (e.g. virus, bacteria) and their host (e.g. humans, plants).
- Clinicians therefore classify infectious microorganisms or microbes according to the status of host defenses - either as primary pathogens or as opportunistic pathogens.
- Organisms which cause an infectious disease in a host with depressed resistance are classified as opportunistic pathogens.
- Opportunistic diseases may be caused by microbes that are ordinarily in contact with the host, such as pathogenic bacteria or fungi in the gastrointestinal or the upper respiratory tract, and they may also result from (otherwise innocuous) microbes acquired from other hosts or from the environment as a result of traumatic introduction.
- Differentiate between primary and opportunistic pathogens in regards to host involvement
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- HIV is an opportunistic infections that feeds on the fact the the immune system is suppressed.
- Opportunistic microorganisms are typically non-pathogenic microorganisms that act as a pathogen in certain circumstances.
- Patients with Human Immunodeficiency Virus (HIV) are particularly susceptible to opportunistic infections.
- These opportunistic pathogens thrive while the human body slowly deteriorates.
- An example of an opportunistic microorganism is Haemophilus ducreyi.
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- Infectious disease results from the interplay between those few pathogens and the defenses of the hosts they infect.
- The appearance and severity of disease resulting from any pathogen depends upon the ability of that pathogen to damage the host as well as the ability of the host to resist the pathogen.
- Clinicians therefore classify infectious microorganisms or microbes according to the status of host defenses - either as primary pathogens or as opportunistic pathogens.
- Culture allows identification of infectious organisms by examining their microscopic features, by detecting the presence of substances produced by pathogens, and by directly identifying an organism by its genotype.
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- Skin flora are usually non-pathogenic and either commensal or mutualistic.
- Primary pathogens cause disease as a result of their presence or activity within the normal, healthy host.
- Organisms which cause an infectious disease in a host with depressed resistance are classified as opportunistic pathogens.
- Opportunistic disease may be caused by microbes that are ordinarily in contact with the host, such as pathogenic bacteria or fungi in the gastrointestinal tract.
- The success of any pathogen depends on its ability to elude host immune responses.
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- Normal flora bacteria can act as opportunistic pathogens at times of lowered immunity.
- It is important to keep in mind that although the immune system has evolved to be able to control many pathogens, pathogens themselves have evolved ways to evade the immune response.
- This section briefly summarizes other ways in which pathogens can "outwit" immune responses.
- But keep in mind, although it seems as if pathogens have a will of their own, they do not.
- Recognize the ways a host can be infected by, and resist, pathogens
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- In the lungs, coughing and sneezing mechanically eject pathogens and other irritants from the respiratory tract.
- In the stomach, gastric acid and proteases serve as powerful chemical defenses against ingested pathogens.
- This reduces the probability that pathogens will reach sufficient numbers to cause illness.
- Normal flora bacteria can act as opportunistic pathogens at times of lowered immunity.
- This is because of their ability to become pathogenic in immune compromised hosts.
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- The achievements of medical care in industrialized societies are markedly impaired due to chronic opportunistic infections that have become increasingly apparent in immunocompromised patients and the aging population.
- Pseudomonas aeruginosa is not only an important opportunistic pathogen and causative agent of emerging nosocomial infections but can also be considered a model organism for the study of diverse bacterial mechanisms that contribute to bacterial persistence.
- It should help researchers learn about the pathogenicity of P. aeruginosa, contribute to a better clinical management of chronically infected patients, and lead to the identification of new drug targets for the development of alternative anti-infective treatment strategies.
- Neisseria gonorrhoeae is an exclusive human pathogen.
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- Individuals who have a suppressed immune system or who are on immunosuppressive drugs are particularly susceptible to opportunistic infections.
- Risk of infection is a nursing diagnosis which is defined as "the state in which an individual is at risk to be invaded by an opportunistic or pathogenic agent (virus, fungus, bacteria, protozoa, or other parasite) from endogenous or exogenous sources. " The risk of infection depends on a number of endogenous sources.
- One should not take antibiotics for longer than needed or when they are not needed—long term use of antibiotics leads to resistance and increased the chance of developing opportunistic infections like clostridium difficile colitis .
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- A fungus is a member of a large group of eukaryotic organisms that includes microorganisms that exhibit pathogenicity.
- Candida species are commonly known to cause opportunist infections in immunocompromised hosts.
- The study of pathogenic fungi is referred to as a medical mycology.
- Candida species are commonly known to cause opportunist infections in immunocompromised hosts .
- One of the most commons fungal pathogenic species includes Aspergillus strains, specifically Aspergillus fumigatus and Aspergillus flavus.
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- Some colonizing bacteria, such as Corynebacteria sp. and viridans streptococci, prevent the adhesion and colonization of pathogenic bacteria.
- Individuals who have a suppressed immune system are particularly susceptible to opportunistic infections.
- Some pathogens grow within the host cells (intracellular) whereas others grow freely in bodily fluids.
- Non-pathogenic organisms can become pathogenic given specific conditions and even the most virulent organism requires certain circumstances to cause a compromising infection.
- Some colonizing bacteria, such as Corynebacteria sp. and viridans streptococci, prevent the adhesion and colonization of pathogenic bacteria.