When a bacterial infection occurs in the lungs or bronchus of the human body, the amount of sputum is significantly increased, and the sputum bacteria are cultured to isolate the pathogenic bacteria, which is helpful for the diagnosis and treatment of infectious diseases of the lower respiratory tract. Gram-positive bacteria include Streptococcus pneumoniae, Staphylococcus aureus, Mycobacterium tuberculosis, Actinomycetes, Nocardia, Anaerococci, Corynebacterium diphtheriae and the like.

Basic Information

Specialist classification: Respiratory examination classification: sputum examination

Applicable gender: whether men and women apply fasting: fasting

Analysis results:

Below normal:

Normal value:
no

Above normal:

negative:
Normal people's lower respiratory tract is sterile, and pathogens, fungi, and tubercle bacilli should not be detected.

Positive:
Gram-positive bacteria include Streptococcus pneumoniae, Staphylococcus aureus, Mycobacterium tuberculosis, Actinomycetes, Nocardia, Anaerococci, Corynebacterium diphtheriae and the like. Gram-negative bacteria include B. catarrhalis, Neisseria meningitidis, Haemophilus influenzae, Klebsiella pneumoniae, Enterobacter, Pseudomonas, Legionella, and the like.

Tips: When coughing, try to prevent saliva and nasopharynx secretions from mixing in order to reduce pollution. Normal value

Normal people's lower respiratory tract is sterile, and pathogens, fungi, and tubercle bacilli should not be detected.

Clinical significance

Common pathogens in sputum culture:

Gram-positive bacteria include Streptococcus pneumoniae, Staphylococcus aureus, Mycobacterium tuberculosis, Actinomycetes, Nocardia, Anaerococci, Corynebacterium diphtheriae and the like.

Gram-negative bacteria B. catarrhalis, Neisseria meningitidis, Haemophilus influenzae, Klebsiella pneumoniae, Enterobacter, Pseudomonas, Legionella, and the like.

Positive results may be diseases: chest wall tuberculosis, anaerobic pneumonia in the elderly, mycoplasma pneumonia, Yersinia enteritis, pediatric tuberculosis, pediatric Staphylococcus aureus pneumonia, pediatric septic shock, Staphylococcus epidermidis pneumonia, nasal discharge Pseudomonas pneumonia, pulmonary faecal nematode disease considerations

1. The collection of sputum specimens is better in the morning, so the patient has more sputum and more bacteria.

2, cough should try to prevent saliva and nasopharyngeal secretions mixed in to reduce pollution.

3. Specimen collection should be sent in time for inspection. If the sputum cultured as Mycobacterium tuberculosis or fungus is not immediately available for inspection, it should be stored in the refrigerator to prevent the growth of bacteria.

4. Bacterial culture and drug susceptibility testing were performed together.

Inspection process

Immediately after the collection of the sputum specimen, the test is carried out, and the common culture method is detected.

Not suitable for the crowd

Inappropriate people: Generally there are no people who are not suitable.

Adverse reactions and risks

No adverse reactions.