<unk>  is a genus in the phylum Proteobacteria (Bacteria), which contains three species, namely:
A. actinomycetemcomitans ( (Klinger 1912) Nørskov-Lauritsen and Kilian 2006,  (type species of the genus); Greek noun aktis, aktinos (ἀκτίς, ἀκτῖνος), a beam; Greek mukēs -ētos, mushroom or other fungus; New Latin actinomyces -etis, an actinomycete; Latin comitans, accompanying; New Latin actinomycetemcomitans, accompanying an actinomycete)
A. aphrophilus (Khairat 1940) Nørskov-Lauritsen and Kilian 2006, Ancient Greek aphros, foam; New Latin philus from Greek philos (φίλος) meaning friend, loving; New Latin aphrophilus, foam-loving)
A. segnis (Kilian 1977) Nørskov-Lauritsen and Kilian 2006,Latin segnis, slow, sluggish, inactive)
1. Endocarditis
1.1 Adults
Preferred regimen (1): Ceftriaxone 2 g/day TV/IM q24h for 4 weeks
Preferred regimen (2): Ampicillin-sulbactam 12 g/day TV q6h for 4 weeks
Preferred regimen (3): Ciprofloxacin 1000 mg PO q24h OR 800 mg/day IV q12h for 4 weeks
1.2 Pediatrics
Preferred regimen (1): Ceftriaxone 100 mg/kg/day TV/IM q24h for 4 weeks
Preferred regimen (2): Ampicillin-sulbactam 300 mg/kg/day TV q6h/q4h for 4 weeks
Preferred regimen (3): Ciprofloxacin 20-30 mg/kg/day IV/PO bid for 4 weeks
Note (1): Floroquinolone therapy recommended for patients unable to tolerate Cephalosporin and ampicillin thearpy
Note (2): For patients < 18 years, Flourouinolones are generally not recommended
Note (3): For patients with endocarditis involving the prosthetic cardiac valve or other prosthetic cardiac material should be treated for 6 weeks
2. Abscess 
Note: The small number of patients reported and the variety of antibiotics used, do not permit identification of the optimal therapeutic regimen for this organism.
Aggregatibacter
Bacteroides
Arcobacter
Lactobacillus
Pseudomonas
Clostridium
Actinomyces
Staphylococcus saprophyticus