Bacteriological examination of sputum and lower respiratory tract secretions

The bacteriological test for sputum and lower respiratory tract secretion specimens is a test for identifying the bacterial or fungal type of sputum and lower respiratory tract secretions, and determining the pathogen's genus for targeted treatment of the patient. The transbronchial material is preferably an anti-pollution sampling brush. Bronchoalveolar lavage should be carried out by protective bronchoalveolar lavage. Basic Information Specialist classification: Respiratory examination classification: pathogenic microbiological examination Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: A negative test result indicates no infection in the lungs. Positive: Positive results suggest that the lungs may have bacterial or fungal infections. Tips: Pay attention to normal eating habits and pay attention to personal hygiene. Normal value The pathogen was not detected, and the undetected fungus was negative. Clinical significance Abnormal result Positive test results for common bacteria: 1. Gram-positive bacteria Streptococcus pneumoniae, Streptococcus pyogenes, MRSA and MssA, MRCNS, Enterococcus, Corynebacterium diphtheriae, Actinomycetes. 2. Gram-negative bacteria meningococcus, catarrhalis, Haemophilus influenzae, Enterobacteriaceae, Acinetobacter, Pseudomonas aeruginosa, Legionella, B. pertussis. 3. Mycoplasma pneumoniae. 4. Fungi. 5. If the mycobacterial infection is suspected, it should be checked for tuberculosis. Patients in need of examination, such as Streptococcus pneumoniae, Streptococcus pyogenes, Corynebacterium diphtheriae, actinomycetes, meningococcus, Bordetella, Mycoplasma pneumoniae, or some other fungal infections. Positive results may be diseases: cytomegalovirus pneumonia, pregnancy with pneumonia, acute pneumonia The transbronchial material is preferably an anti-pollution sampling brush. Bronchoalveolar lavage should be carried out by protective bronchoalveolar lavage. Forbidden before examination: Pay attention to normal eating habits and pay attention to personal hygiene. Requirements for inspection: Actively cooperate with the doctor. Inspection process The inspection method usually uses direct smear examination, general bacterial culture (quantitative culture), and fungal culture. (1) Sputum specimens should be smear microscopy before culture. If squamous epithelial cells ≤10/low power field, white blood cells ≥25/low power field, it is a qualified sputum specimen, and the culture results are usually meaningful. (2) When the result of three consecutive sputum cultures is the same bacterium, the patient may be a bronchial-lung infection of the bacterium. (3) When the results of sputum culture are consistent with the results of pleural effusion or blood culture, it is confirmed that the patient is infected with the bacterium. (4) If the specimen is cultured in bacteria, the colony count in any medium is ≥108 CFU/ml (anaerobic bacteria ≥109 CFU/ml), or the colony count is ≥107 CFU/ml pure culture, or the dominant colony count>saliva homologous A hundred times of bacteria can be considered as the infection of the bacteria. Not suitable for the crowd The test is a non-invasive test with no specific contraindications. Adverse reactions and risks This test is a non-invasive test and generally does not cause serious complications or other hazards.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.