These tiny, pleomorphic gram-negative bacteria range in shape from round (cocci) to short, thin rods (bacilli); hence the bacteria are called “coccobacilli.” Infections most commonly associated with encapsulated strains of Haemophilus influenzae include meningitis, epiglottitis, cellulitis with bacteremia, septic arthritis, ad pneumonia.

Haemophilus species are Gram-negative coccobacilli that share common ultrastructural features with other Gram-negative bacilli. Their cell walls contain lipooligosaccharide, which resembles the lipopolysaccharide of Gram-negative bacilli but has shorter side chains (hence the designation oligosaccharide rather than polysaccharide).

Haemophilus is a genus of Gram-negative, pleomorphic, coccobacilli bacteria belonging to the family Pasteurellaceae. [2][3] While Haemophilus bacteria are typically small coccobacilli, they are categorized as pleomorphic bacteria because of the wide range of …

Gram-negative cocciin pairs Pathogenic species: M. catarrhalis Commonly colonizes URT of children Endogenous infections: Otitis media, sinusitis, bronchitis, pneumonia Risk group: patients with underlying chronic lung disease Immunosupressed: meningitis, bacteremia Genus: Moraxella Normal pharyngeal and conjunctiva flora

Haemophilus somnus is a pleomorphic, nonencapsulated, gram-negative bacterium. Diseases caused by this organism include thromboembolic meningoencephalitis (TEME), septicemia, arthritis, and reproductive failures due to genital tract infections in males and females.

The gram-negative coccobacillus bacteria Haemophilus species cause numerous mild and serious infections, including bacteremia, meningitis, pneumonia, sinusitis, otitis media, cellulitis, and epiglottitis. Diagnosis is by culture, nucleic acid amplification tests, and serotyping. Treatment is with antibiotics.

2016年9月15日 · They are small gram–negative coccobacilli, which neither produce nor have the genetic material to code for a polysaccharide capsule. They grow aerobically or as facultative anaerobes; require protoporphyrin IX or iron–containing protoheme, NAD, or NAD phosphate; and grow optimally between 35 and 37°C.

All members of the genus Haemophilus are small, pleomorphic, Gram-negative coccobacilli. The genus consists of diverse species, including some that are pathogens in humans and others that are pathogens in animals. Additional species are commensal organisms and …

Haemophilus influenzae is a gram-negative coccobacillus associated with meningitis, epiglottis, cellulitis pneumoniae, and otitis media. Before vaccine introduction , H. influenzae type B (Hib) accounted for all 200,000 cases of H. influenzae in children with a particular predilection for meningitis and high morbidity ( Committee on Infectious ...

On Gram stain, Haemophilus spp. appear as small, pleomorphic, Gram‐negative coccobacilli with coccoid, coccobacillary, rod‐shaped, or filamentous forms (Fig. 3). Because of the pleomorphism of Haemophilus spp., careful… Optimum recovery of Haemophilus spp. in culture requires enriched media that support the growth of these fastidious bacteria.