Category: H

Organism associated with non-specific urethritis, but much confusion exists over the taxonomy of Haemophilus-like bacteria in the vagina.  

Pig-infecting species associated with a virus infection but (unlike H. influenzae) it ferments no carbohydrates.  

‘Haemophilus’pertussis and ‘Haemophilus’parapertussis do not require X or V factors, and are now placed in the genera Borde- tella and Acinetobacter.  

Non-haemolytic species requiring only V factor. Performs both commensal and pathogenic roles in respiratory tract, and has been the infecting agent in meningitis.  

The organism in this species is larger than others in the genus, and does not require X factor on cultivation. Associated with pharyngitis and endocarditis.  

Species similar to H. influenzae, but showing haemolysis around the colonies on blood agar.  

Species causing chancroid (soft sore) requiring X factor, and difficult in primary culture, which is best effected on rabbit blood clot. Cultivated strains are agglutinable by specific antisera. The causative organism of chancroid or soft chancre.  

Species similar to H. influenzae, but not requiring V factor in cultivation. Found in preputial secretions of dogs.  

Intracellular species associated with conjunctivitis, having characteristics similar to those of H. influenzae. A species that can cause bacterial conjunctivitis and a potentially life-threatening pediatric infection called Brazilian purpuric fever.  

Anti-species serum (known also as haemolytic amboceptor) pre¬ pared, for example, by injecting sheep red cells into rabbits, the harvested rabbit serum plus complement being haemolytic to sheep erythrocytes. It is used as an indicator in complement fixation tests.