Category:Actinomyces
- Usually long filamentous branching Gram positive rods
- Anaerobic or facultativlyy anaerobic and capnophilic
- Live in nasopharyngeal and oral mucosa
- Cause pyogranulomatous lesions
- Actinomyces bovis
- Found naturally in oral cavity of cattle
- Prefers anaerobic conditions but not strict anaerobe
- Entry of organism into tissues following trauma to the mucosa from rough feed or tooth eruption
- Causes granulomatous inflammation of soft tissues and bone, causing lumpy jaw
- Usually invades mandible to cause osteomyelitis and may extend to surrounding muscles
- The lesions begins as a painless swelling of the affected bone
- Swelling becomes more painful and enlarges over a number of weeks, gaining fistulous tracts which discharge pus
- Organisms found in yellow sulphur granules
- Club colony formation
- Colonies adhere to agar media and are non-haemolytic
- Surgical treatment possible when lesions are small
- Prolonged parenteral penicillin treatment may be beneficial early in the disease
- Actinomyces viscosus
- Commensal of oral cavity of dogs and humans
- Canine actinomycosis
- Causes localised subcutaneous pyogranulomatous lesions and fibrovascular proliferation of peritoneal (peritonitis) and pleural surfaces in dogs
- Leads to pyothorax
- Respiratory distress
- Cutaneous pustules in horses
- Abortion in cattle
- Rods contained in soft grey granules which release the organism when squashed
- Two types of colonies: large and smooth colonies with V, Y and T configurations or small and rough colonies with short branching filaments
- Grow in 10% carbon dioxide
- Usually responds to penicillin
- Actinomyces hordeovulneris
- Organism found in seed heads of certain grasses
- Colonies adhere to agar and are non-haemolytic
- Filamentous, branching organisms
- Cause cutaneous and visceral abscessation, pleuritis, peritonitis and arthritis in dogs
- Actinomyces bovis
Pages in category "Actinomyces"
The following 3 pages are in this category, out of 3 total.