Actinobacillus


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Actinobacillus

A genus of gram-negative, immotile and nonspore-forming, oval to rod-shaped, often pleomorphic bacteria which occur as parasites or pathogens in mammals (including humans), birds, and reptiles. They are facultatively aerobic, capable of fermenting carbohydrates (without production of gas) and of reducing nitrates. The genomic DNA contains between 40 and 47 mol % guanine plus cytosine. The actinobacillus group shares many biological properties with the genus Pasteurella. See Pasteurella

Actinobacillus (Pasteurella) ureae and A. hominis occur in the respiratory tract of healthy humans and may be involved in the pathogenesis of sinusitis, bronchopneumonia, pleural empyema, and meningitis. Actinobacillus actinomycetemcomitans occurs in the human oral microflora, and together with anaerobic or capnophilic organisms may cause endocarditis and suppurative lesions in the upper alimentary tract. Actinobacilli are susceptible to most antibiotics of the β-lactam family, aminoglycosides, tetracyclines, chloramphenicol, and many other antibacterial chemotherapeutics. See Antibiotic, Medical bacteriology

Actinobacillus

[‚ak·tə·nō·bə′sil·əs]
(microbiology)
A species of gram-negative, oval, spherical, or rod-shaped bacteria that are of uncertain affiliation; coccal and bacillary cells are often interspersed, giving a “Morse code” form; species are pathogens of animals, occasionally of humans.
References in periodicals archive ?
The bone-resorbing activities in tissue culture of lipopolysaccharides from the bacteria Actinobacillus actinomycetemcomitans, Bacteroides gingivalis and Capnocytophaga ochracea isolated from human mouths.
Previously grouped as [Pasteurella haemolytica]-" Actinobacillus salpingitidis" complex, a new genus was established following genetic and morphologic descriptions 4 It has been proposed that G anatis has a role in peritonitis and salpingitis in chickens concurrently infected with avian pathogenic E coli.
Actinobacillus, Capnocytophaga, Eikenefla, Kingelta, Pasteurella, and other fastidious or rarely encountered gram-negative rods.
Detachment of Actinobacillus Actinomycetemcomitans Biofilm Cells by an Endogenous Beta--Hexosaminidase Activity.
This incidence rate exceeds rates of infections caused by Bartonella quintana; Coxiella burnetii; and members of the Haemophilus, Actinobacillus, Cardiobacterium, Eikenella, Kingella spp.
aureus olgularin %90'indan sorumlu iken, bu siklik mantar ve HACEK grubu (Haemophilus parainfluenzae, Haemophilus aphrophilus, Haemophilus paraphrophilus, Haemophilus influenzae, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, Kingella kingae ve Kingella denithficans) ile meydana gelen olgulardaki artisla birlikte %50-60'a dusmustur.
Evidence for the role of highly leukotoxic Actinobacillus actinomycetem-comitans in the pathogenesis of localised and other forms of early-onset periodontitis.
Length of incubation: Studies have shown that incubating blood-culture bottles past the accepted five days does not improve recovery of even the most fastidious microorganisms, most notably the rarely isolated HACEK group--Haemophilus, Actinobacillus, Cardiobacterium, Eikenella, and Kingella.
11) The gram-negative bacteria Porphyromonas gingivalis, Aggregatibacter actinomycetemcomitans (formerly Actinobacillus actinomycetemcomitans), Tannerella forsythia and Treponema denticola are strongly implicated in the etiology of periodontal disease.
Caulobacter crescentus (2), Photobacterium leiognathi (3), Brucella abortus (4) Haemophilus species (5) Legionella species (6) Actinobacillus and Pasteurella species (7), Escherichia coli (8,9), Salmonella Typhimurium, S.
Phenotypic variation in Actinobacillus actinomycetemcomitans during laboratory growth; implication for virulence.

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