When infection is caused by this bacterium, the infection is typically chronic and granulomatous in nature and is most often caused by
Actinomyces israelii [1, 2].
The commonest specie is
actinomyces Israelii.5 This was also the causative agent in our case.
The number of the following bacteria declined in the control group: Blautia producta, Clostridium clostridiforme, Lactobacillus acidophilus, Capnocytophaga ochracea, and Streptococcus sanguinis, and the number of the following bacteria increased:
Actinomyces israelii, Actinomyces naeslundii, Campylobacter gracilis, Streptococcus mitis, Streptococcus salivarium, Escherichia coli, and Neisseria subflava, as well as fungi Candida albicans (Table 5).
Evans, "
Actinomyces israelii in the female genital tract: a review," Genitourinary Medicine, vol.
(iii)
Actinomyces israelii usually causes localized cervicofacial disease where as Actinomyces meyeri is noted to cause pulmonary infection with propensity to cause systemic disseminated disease involving skin, long bones, muscle, liver, and brain.
Actinomycosis is a bacterial infection due to
Actinomyces israelii, a gram-positive anaerobic organism.
Qureshi et al., "Antimicrobial activity of varying concentrations of sodium hypochlorite on the endodontic microorganisms
Actinomyces israelii, A.
Coinfection of Fusobacterium nucleatum and
Actinomyces israelii in mastoiditis diagnosed by next-generation DNA sequencing.
Culture results showed heavy growth of
Actinomyces israelii and Gram positive rods, moderate growth of Gram positive cocci, and numerous WBC.
The bacteria that were used in this study were Salmonella typhi (PTCC 1319), Escherichia coli (PTCC 1533), Haemophilus influenzae (PTCC 1484), Pseudomonas aeruginosa (PTCC 1310), Klebsiella oxytoca (PTCC 1609), Antro bacter (PTCC 1298), Staphylococcus aureus, Listeria monocytogenes, Staphylococcus epidermidi, Staphylococcus haemolyticus, Streptococcus suis, Treptococcus dysgalactiae, Clostridium Perfringens,
Actinomyces israelii, Clostridium botulinum, Actinomyces europaeus.
3: histopathologic specimen shows filamentous branching bacteria (arrows) positive to silver impregnation, characteristic of grains of
Actinomyces israelii.
In man, it is usually caused by
Actinomyces israelii and less often by Arachnia (Actinomyces) propionica, Actinomyces naeslundii, Actinomyces viscosus, and Actinomyces odontolyticus.
