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Moraxella catarrhalis is a fastidious, nonmotile, Gram-negative, aerobic, oxidase-positive diplococcus that can cause infections of the respiratory system, middle ear, eye, central nervous system, and joints of humans. It causes the infection of the host cell by sticking to the host cell using trimeric autotransporter adhesins.
It causes similar symptoms to Haemophilus influenzae, although it is much less virulent. Unlike Neisseria meningitidis, which is a morphological relative of M. catarrhalis, it hardly ever causes bacteremia or meningitis. Moraxella lacunata is one of the causes of blepharoconjunctivitis in human. [2]
Moraxella spp Nasopharynx Moraxella catarrhalis: Nasopharynx Mycoplasma orale: Oropharynx Mycoplasma pneumoniae: Respiratory epithelium Neisseria spp Nasopharynx Neisseria cinerea: Nasopharynx Neisseria elongata: Pharynx Neisseria gonorrhoeae: Pharynx [citation needed] Neisseria lactamica: Nasopharynx Neisseria meningitidis: Nasopharynx ...
It is commonly known as "walking pneumonia" because its symptoms are often mild enough that one can still be up and about. [18] [19] "Atypical pneumonia" is atypical in that it is caused by atypical organisms (other than Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis). [20]
The harmful or potentially harmful bacteria are also detected routinely in respiratory specimens. The most significant are Moraxella catarrhalis, Haemophilus influenzae, and Streptococcus pneumoniae. They are known to cause respiratory disorders under particular conditions namely if the human immune system is impaired.
CAP is common, affecting people of all ages, and its symptoms occur as a result of oxygen-absorbing areas of the lung filling with fluid. This inhibits lung function, causing dyspnea, fever, chest pains and cough. CAP, the most common type of pneumonia, is a leading cause of illness and death worldwide [citation needed].
The most common organisms which cause lobar pneumonia are Streptococcus pneumoniae, also called pneumococcus, Haemophilus influenzae and Moraxella catarrhalis. Mycobacterium tuberculosis, the tubercle bacillus, may also cause lobar pneumonia if pulmonary tuberculosis is not treated promptly.
Moraxella catarrhalis and Acinetobacter baumannii are human pathogens, and Moraxella bovis is the cause of "pinkeye" of cattle ...