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One reason for such a discrepancy is that normal, healthy lungs have bacteria, and sputum cultures collect both normal and pathogenic bacteria. However, pure cultures of common respiratory pathogens in the absence of upper respiratory flora combined with symptoms of respiratory distress provides strong evidence of the infectious agent, and its ...
[4] [5] Fusobacterium was discovered in 1900 by Courmont and Cade and is common in the flora of humans. [ 6 ] [ 7 ] Strains of Fusobacterium can cause several human diseases and infections, including periodontal diseases , Lemierre's syndrome , [ 8 ] oral, head, and neck infections, as well as colorectal cancer and topical skin ulcers .
Rothia mucilaginosa is a Gram-positive, coagulase-negative, encapsulated, non-spore-forming and non-motile coccus, present in clusters, tetrads or pairs that is a part of the normal oropharyngeal flora. [3] Belonging to the family Micrococcaceae, it was first isolated from the mucous membrane of the cheek and gingiva. [4]
Prevotella melaninogenica is a species of bacterium in the normal microbiota of the upper respiratory tract. It is an important human pathogen in various anaerobic infections, often mixed with other aerobic and anaerobic bacteria. [2] P. melaninogenica is an anaerobic, Gram-negative rod, named for its black colonies, and black pigment.
A throat culture is a laboratory diagnostic test that evaluates for the presence of a bacterial or fungal infection in the throat. A sample from the throat is collected by swabbing the throat and placing the sample into a special cup that allows infections to grow. If an organism grows, the culture is positive and the presence of an infection ...
F. necrophorum infection (also called F-throat [12]) usually responds to treatment with augmentin or metronidazole, but penicillin treatment for persistent pharyngitis appears anecdotally to have a higher relapse rate, although the reasons are unclear. [citation needed]
In this respect, H. influenzae cultured from the nasopharyngeal cavity or throat would not indicate H. influenzae disease, because these sites are colonized in disease-free individuals. [37] However, H. influenzae isolated from cerebrospinal fluid or blood or joint fluid would indicate invasive H. influenzae infection.
Graphic depicting the human skin microbiota, with relative prevalences of various classes of bacteria. The human microbiome is the aggregate of all microbiota that reside on or within human tissues and biofluids along with the corresponding anatomical sites in which they reside, [1] [2] including the gastrointestinal tract, skin, mammary glands, seminal fluid, uterus, ovarian follicles, lung ...