PMID: 2826546Nov 1, 1987

Characterisation of Branhamella catarrhalis and differentiation from Neisseria species in a diagnostic laboratory

Journal of Clinical Pathology
F AhmadM A Calder


To distinguish Branhamella catarrhalis from Neisseria species a study of 140 strains was made on simple laboratory media, with particular reference to deoxyribonuclease (DNase) production, superoxol reaction, and growth characteristics. All 97 clinical isolates of B catarrhalis (58 of which were beta-lactamase positive) and eight strains of B catarrhalis from the National Collection of Type Cultures were DNase positive and superoxol positive. None grew on modified New York City medium, modified Thayer Martin medium, MacConkey agar, crystal violet blood agar, nor under anaerobic conditions. Of the 16 different non-pathogenic Neisseria species tested, all were DNase negative, eight (50%) were superoxol reaction negative, and 13 (81%) grew on crystal violet blood agar. Using simple laboratory media, DNase, and superoxol tests, it was possible to identify B catarrhalis and to distingish it from pathogenic and non-pathogenic Neisseria species.


Feb 1, 1978·The British Journal of Venereal Diseases·H Young
Jun 1, 1976·The British Journal of Venereal Diseases·H YoungD R McDonald
Jan 1, 1976·Scandinavian Journal of Infectious Diseases·J E BrorsonS E Holm
Mar 1, 1986·Diagnostic Microbiology and Infectious Disease·G V Doern
Apr 1, 1972·Antimicrobial Agents and Chemotherapy·C H O'CallaghanA H Shingler
Nov 12, 1983·British Medical Journal·D T McLeodA Seaton
Apr 1, 1984·The British Journal of Venereal Diseases·H YoungJ W Tapsall
Sep 1, 1984·Antimicrobial Agents and Chemotherapy·F AhmadM A Calder
Mar 1, 1982·Journal of Clinical Microbiology·R J ArkoG Reising
Feb 1, 1980·Journal of Clinical Microbiology·G V Doern, S A Morse
Jun 1, 1981·Journal of Clinical Microbiology·M A JohnsonM Roberts


May 1, 1990·Diagnostic Microbiology and Infectious Disease·M LouieK R Forward
Oct 1, 1990·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·I JönssonA Krook
Sep 2, 2009·Microbiology and Molecular Biology Reviews : MMBR·Stefan P W de VriesPeter W M Hermans
Aug 1, 1988·Journal of Clinical Pathology·R P Cooke
Jan 1, 1989·Journal of Clinical Pathology·P T Mannion
Aug 1, 1988·Journal of Clinical Pathology·B SeitanidesA Karabelis
Aug 1, 1988·Journal of Clinical Pathology·E Larson, A Welch
Jan 1, 1989·Journal of Clinical Pathology·V V Damiano

Related Concepts

Moraxella (Branhamella) catarrhalis
Alkaline DNase

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

The Tendon Seed Network

Tendons are rich in the extracellular matrix and are abundant throughout the body providing essential roles including structure and mobility. The transcriptome of tendons is being compiled to understand the micro-anatomical functioning of tendons. Discover the latest research pertaining to the Tendon Seed Network here.

Myocardial Stunning

Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.


Incretins are metabolic hormones that stimulate a decrease in glucose levels in the blood and they have been implicated in glycemic regulation in the remission phase of type 1 diabetes. Here is the latest research.

Chromatin Regulation and Circadian Clocks

The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.

Long COVID-19

“Long Covid-19” describes illness in patients who are reporting long-lasting effects of the SARS-CoV-19 infection, often long after they have recovered from acute Covid-19. Ongoing health issues often reported include low exercise tolerance and breathing difficulties, chronic tiredness, and mental health problems such as post-traumatic stress disorder and depression. This feed follows the latest research into Long Covid.

Spatio-Temporal Regulation of DNA Repair

DNA repair is a complex process regulated by several different classes of enzymes, including ligases, endonucleases, and polymerases. This feed focuses on the spatial and temporal regulation that accompanies DNA damage signaling and repair enzymes and processes.