V-Factor Disks

V-Factor Discs are used for the presumptive identification of Haemophilus species and find their application in various sectors such as the food and dairy industry, water industry, pharmaceutical laboratory testing, cosmetic industry, environmental and sanitary testing, clinical diagnostic, etc.

V-Factor Discs are used for the presumptive identification of Haemophilus species based on their requirements for X or V growth factors or both. Members of the genus Haemophilus require accessory growth factors for in vitro growth. Some Haemophilus spp. require X factor (hemin) alone, V factor (nicotinamide adenine dinucleotide [NAD]) alone, or a combination of the two. Consequently, this significant difference in growth factor requirements of Haemophilus spp. allows for their differentiation. V factor comprises nicotinamide adenine dinucleotide (NAD) or nicotinamide adenine dinucleotide phosphate (NADP). The organisms will grow only around the disk that provides the appropriate factor for the growth of the organism. Differentiation is hence based on the presence or absence of growth around the discs impregnated with V-factor.

one package contains 50 test discs (sterile filter paper impregnated with coenzyme-diphosphopyridine nucleotide)