WebMar 12, 2024 · Two Haemophilus -like isolates with similar biochemical characteristics, designated strains SZY H1T and SZY H2, were isolated from human semen specimens. Cells were Gram-negative, non-motile, non-acid-fast, pleomorphic rods or coccobacilli. The major fatty acids (>10 %) were C16 : 0, C14 : 0, iso-C16 : 0 and/or C14 : 0 3-OH and C16 : 1 ω6c … WebHaemophilus spp. require one or both of two accessory growth factors (X and V). X factor can be provided by hemin, protoporphyrin IX or other iron-containing porphyrins. X-dependent Haemophilus spp. cannot synthesize protoporphyrin from δ-aminolevulinic acid, a process involving several enzyme-mediated steps, some or all of which may be defective.
Porphyrin the Speciation ofHaemophilus,with Rapid Test … - 豆丁网
WebHaemophilus: Haemophilus bacteria are G- coccobacilli that are frequently distinguished by their X and V factor requirements. X factor is hemin, an iron containing porphyrin … WebPorphyrin Test Used to differentiate Haemophilus sp. on the basis of their ability to synthesize heme (factor X) based on the ability to produce enzymes that convert ALA (δ-aminolevulinic acid) into prophyrins H. influenzae + Kovac's reagent = no red color (-) H. parainfluenze + Kovac's reagent = red color (+) fnf split ex midi
Biochemical Test of Haemophilus parainfluenzae - Microbe Notes
WebOnly six of the 42 strains were able to grow on horse-blood agar. All strains gave a positive oxidase test with tetramethyl-p-phenylenediamine and a negative result with dimethyl-p-phenylenediamine. All of 15 test strains were negative in the porphyrin test. WebPorphyrin Test Agar is a solid medium that is used for speciation of Haemophilus based on the ability to convert delta-aminolevulinic acid (ALA) to porphyrin. Porphyrin Test Agar … WebNov 1, 1993 · Abstract and Figures Porphyrin production by the haemin-independent Haemophilus parainfluenzae in the diagnostic porphyrin test, which determines the X-factor requirement in Haemophilus... greenville nc to morehead nc