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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]
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.
Causes a severe form of pneumonia with a relatively high mortality rate, known as legionellosis or Legionnaires' disease. Mycoplasma pneumoniae Usually occurs in younger age groups and may be associated with neurological and systemic (e.g. rashes) symptoms. See Mycoplasma pneumonia. Atypical pneumonia can also have a fungal, protozoan, or viral ...
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 ...
The pathophysiology of mastoiditis is straightforward: bacteria spread from the middle ear to the mastoid air cells, where the inflammation causes damage to the bony structures. Streptococcus pneumoniae , Streptococcus pyogenes , Staphylococcus aureus , Haemophilus influenzae , and Moraxella catarrhalis are the most common organisms recovered ...
Moraxella catarrhalis and Acinetobacter baumannii are human pathogens, and Moraxella bovis is the cause of "pinkeye" of cattle ...
CAP in older infants reflects increased exposure to microorganisms, with common bacterial causes including Streptococcus pneumoniae, Escherichia coli, Klebsiella pneumoniae, Moraxella catarrhalis and Staphylococcus aureus. Maternally-derived syphilis is also a cause of CAP in infants.