This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Pseudomonal infection not cleaned by \nSelect and explain. \nA. Dettol, B. Hypochlorite, C. Chlorine, D. Betadine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pseudomonas species grow comparatively well in Dettol.\n\nCetrimide & dettol have been incorporated in the media for the selective isolation of pseudomonas.\nGram negative bacilli.\nMotile by polar flagellum.\nNon capsulated but many stains have mucoid slime layer especially the organisms which are isolated from cystic fibrosis patient.\nObligate aerobe.\nColonies emit a distinctive, musty, mawkish, earthy or sweet grape-like odor or corn tocolike odor.\nCetrimide agar is a selective media.\nPseudomonas aeruginosa produces a numbers of pigments. The production of these pigments accounts for the colour of colonies.\n\nVarious pigments are:\n\nPyocyanin (most important): - It is produced only by Pseudomonas aeruginosa and gives bluish green color. It inhibits the growth of many other bacteria.\nPyoverdin (fluorescein):- gives greenish yellow color.\nPyorubin:- Produces red color.\nPyomelanin: - Produces black color.\n\n\nPseudomonas is an important cause of life threatening bacteremia in immunocompromised patients. Ecthyma gangrenosum is the pathognomic skin lesion of P.aeruginosa bacteremia.\nP.aeruginosa is the most common and most serious cause of infection in burns.\nMC infection outside hospital is suppurative otitis.\nP.aeruginosa causes shanghai fever.\nIt produces blue pus with characteristic fruity odor.', 'role': 'assistant'}]