Actinomycosis

Question 1

Causative organism of Actinomycosis

Answer 1

Actinomyces Israeli
(anaerobic gram +ve commensal Bacteria)

Question 2

normal site of Actinomyces Israeli

Answer 2

Oral cavity

Question 3

Mode of infection of Actinomycosis

Answer 3

Endogenous (from inside the body), when immunity is lowered

Question 4

Gross Pathological features of Actinomycosis

Answer 4

Gross:
* Multiply Interconnected subcutaneous abcesses
* opening to surface by multiple sinuses
* Discharges Sulphur granules: pus & yellow bacterial colonies

Question 5

Microscopic Pathological features of Actinomycosis

Answer 5

• Central zone: pus containing bacterial colonies, thin filaments & club like swellings
• Mid zone: Inflammatory cells (polymorph cells & pus cells)
• Outer zone: Fibrosis

Question 6

Most common type of Actinomycosis

Answer 6

Cervicofascial Actinomycosis (60%): affects angle of mandible, parts of neck and face

Question 7

Enumerate types of Actinomycosis

Answer 7

• Cervicofascial Actinomycosis
• Blood spread (may occur)
• Intestinal Actinomycosis
• Pulmonary Actiomycosis
• Skin Actinomycosis

Question 8

True or false, Actinomycosis doesn’t spread by lymphatics, reason ?

Answer 8

True
large size filaments –> can’t spread by lympahtics