MindMap Gallery Actinomycetes mind map
This is a mind map about Actinomycetes, medical microorganisms, including common characteristics, Actinomyces, Nocardia, etc.
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Actinomycetes
common characteristics
Filamentous or chain-like, growing in branches and arranged radially
About 70% of widely used antibiotics are produced by actinomycetes
Normal human flora—endogenous infection
Actinomycetes chlamydophila, which is highly pathogenic to humans
Biological traits
G, non-acid-fast filamentous bacteria
No spores, no flagella, no capsule
Reproduction by fission
Cultivation characteristics
Anaerobic or microaerophilic, slow growth, add 5% CO2 for initial separation
Difficulties in cultivating
Glucose broth culture medium for 3 to 6 days—small gray-white spherical particles
Blood agar culture medium for 4 to 6 days—gray white or light yellow rough tiny round colonies, not hemolytic
Brain heart infusion agar medium for 4 to 6 days—white tooth-shaped colonies
Patient's pus - sulfur-like particles (colonies), chrysanthemum-like under the microscope
Pathogenicity
Found in the oral cavity, respiratory tract, and reproductive tract
Decreased body resistance and poor oral hygiene → opportunity to cause disease
Disease caused
Actinomycosis (common in face and neck)
Soft tissue purulent inflammation
chronic granuloma
Multiple fistulas, sulfur-like particles in pus
include
Actinomycetes of the face and neck
lung infection
abdominal infection
pelvic infection
Immunity
cellular immunity
microbiological examination
Look for sulfur-like particles in pus and sputum, and observe chrysanthemum-like hyphae after tableting.
Prevention and control principles
Pay attention to oral hygiene
Penicillin of first choice
Nocardia
Saprophytic parasites—exogenous infections
Causes include
Nocardia stariformis
Nocardia brasiliensis
G
Some are weakly acid-resistant (nocardiac acid)—distinguishable from actinomycetes
obligate aerobic
Low nutritional requirements and slow growth
exogenous infection
Star shape - respiratory tract, wound invades the body
purulent infection
Pulmonary manifestations similar to tuberculosis (common)
meningitis
Chronic granuloma of subcutaneous tissue
Brazil—Trauma invades subcutaneous tissue
chronic suppurative granuloma
Mycomycosis
Look for yellow or black granular Nocardia colonies in the pus
Surgical debridement
antibiotics, sulfonamides