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Moraxella catarrhalis is a fastidious, nonmotile, ... Additionally, it causes bacterial pneumonia, especially in adults with a compromised immune system. [13]
Gram-negative bacteria are seen less frequently: Haemophilus influenzae , Klebsiella pneumoniae , Escherichia coli , Pseudomonas aeruginosa , Bordetella pertussis, and Moraxella catarrhalis are the most common. These bacteria often live in the gut and enter the lungs when contents of the gut (such as vomit or faeces) are inhaled.
Moraxella is a genus of gram-negative bacteria in the family Moraxellaceae. It is named after the Swiss ophthalmologist Victor Morax . The organisms are short rods , coccobacilli , or as in the case of Moraxella catarrhalis , diplococci in morphology, with asaccharolytic, oxidase -positive, and catalase -positive properties. [ 2 ]
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.
"Atypical pneumonia" is atypical in that it is caused by atypical organisms (other than Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis). [20] These atypical organisms include special bacteria, viruses, fungi, and protozoa.
In patients with "simple" COPD, therapy should be targeted towards Haemophilus influenzae, Moraxella catarrhalis, Streptococcus pneumoniae, and possibly pathogens of atypical pneumonia. [7] The first-line treatment is a beta-lactam antibiotic such as amoxicillin. The choice will depend on resistance patterns. [7]
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50% of patients are colonised with Haemophilus influenzae, Streptococcus pneumoniae, or Moraxella catarrhalis. [8] Antibiotics have only been shown to be effective if all three of the following symptoms are present: increased dyspnea , increased sputum volume, and purulence .