Last updated on May 30th, 2021Bordetella pertussis is a small Gram-negative coccobacillus. It is the causative agent of whooping cough (pertussis), an acute respiratory infection most common in children. Two species, B. pertussis and B. parapertussis cause […]
Last updated on May 30th, 2021Acinetobacter is a group of bacteria commonly found in soil, water, and dry environments. Acinetobacter poses very little risk to immune-competent people and the infections are mainly confined in healthcare settings […]
Last updated on May 30th, 2021X factor (hemin) and V factor (nicotinamide-adenine-dinucleotide, NAD) requirement tests are done for the identification and differentiation of Haemophilus spp. especially identification of Haemophilus influenzae, which causes deadly diseases like meningitis, […]
Last updated on May 28th, 2021The most common gram-negative cocci of medical importance belong to the family Neisseriaceae which includes the genera Neisseria, Moraxella, Kingella, Acinetobacter etc. Gram Negative Cocci Neisseria species The genus Neisseria contains 12 […]
Last updated on May 30th, 2021Brucellosis is one of the world’s most widespread zoonoses which is highly infective for humans. Human brucellosis usually presents as an acute febrile illness, but the disease may persist as […]
Last updated on June 9th, 2021Q fever is a zoonotic disease with worldwide distribution having both acute and chronic stages. Q fever is caused by the intracellular bacterium Coxiella burnetii and is endemic in nearly […]
Last updated on June 4th, 2021Most strains of Haemophilus spp do not grow on 5% sheep blood agar, which contains hemin (factor X) but lacks NAD (factor V). Staphylococcus aureus produces NAD as a metabolic […]
Last updated on June 4th, 2021Bacterial cells have a wide variety of sizes, shapes, and arrangements. They are too small to see through the naked eye. The unit of measurement used for microorganisms is the […]
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