Neisseria, Moraxella, Haemophilus and related gram-negative coccal organisms
Neisseria gonorrhoeae, Neisseria meningitides, Moraxella catarrhalis, and other Neisseria spp. are clinically relevant gram-negative cocci.
N. gonorrhoeae is the leading cause of sexually transmitted disease whereas N. meningitides is a leading cause of fatal bacterial meningitis.
Neisseria meningitidis causes life-threatening bacterial meningitis and meningococcaemia. Learn its serogroups (A, B, C, W, X, Y), virulence factors (capsule, LOS, fimbriae, IgA pr...
Neisseria gonorrhoeae and N. meningitidis look identical under the microscope, but one uses glucose only and the other uses glucose and maltose. RCUT reads that sugar panel in 4 ho...
Modified Thayer-Martin (MTM) agar is the standard selective medium for isolating Neisseria gonorrhoeae from genital specimens. Learn its VCNT antibiotic selectivity, GC agar base c...
The medically important Gram-negative cocci include Neisseria gonorrhoeae (gonorrhoea, ophthalmia neonatorum), N. meningitidis (meningitis), and Moraxella catarrhalis (otitis media...
N. gonorrhoeae and N. meningitidis are both Gram-negative diplococci but differ fundamentally in capsule, diseases, transmission, maltose fermentation, serogroups, vaccine availabi...
New York City (NYC) medium is a selective medium for Neisseria gonorrhoeae that uniquely supports genital Mycoplasma and Ureaplasma alongside Neisseria. Learn its principle, horse...
Neisseria gonorrhoeae causes gonorrhoea — the second most common STI globally. Learn its Gram-negative diplococcus properties, virulence factors (pili, Opa proteins, IgA protease,...
How to interpret an FTA-ABS result: what reactive-plus-reactive-RPR confirms, why FTA-ABS stays positive for life, why it cannot monitor treatment, and how it now compares to TPPA...
A complete guide to biochemical tests used in bacterial identification — 40+ tests organised by category with principle, positive result, and organisms identified. Includes IMViC,...
