The bacteria in the ear, nose and throat are all from the outside world and do not cause disease under normal circumstances. However, infection may occur due to a decrease in body or local body resistance and other external factors. Therefore, bacterial culture of ear, nose and throat swabs can isolate pathogenic bacteria and contribute to the diagnosis of otitis media, rhinitis, sinusitis, diphtheria, suppurative tonsillitis and acute pharyngitis. The specimen is taken by a doctor using a sterile cotton swab and the secretion of the patient's lesion is taken for examination.

Basic Information

Specialist classification: otolaryngology 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:
Normal people have no bacteria in the middle ear and sinus, that is, no bacteria can be cultured; the pharyngeal isthmus culture should have normal oral flora, and no pathogenic bacteria grow.

Positive:
Prompt pathogen infection, can clearly diagnose the pathogens of ear, nose and throat infection.

Tips: When collecting specimens, try to avoid contamination of bacteria that are normally settled. You can use a sterile cotton swab to wipe the surface before taking the specimen. Normal value

Normal people have no bacteria in the middle ear and sinus, that is, no bacteria can be cultured; the pharyngeal isthmus culture should have normal oral flora, and no pathogenic bacteria grow.

Clinical significance

It is used to clearly diagnose pathogens of ear, nose and throat infections. Common pathogens are:

1. Gram-positive bacteria include Staphylococcus aureus, Streptococcus pneumoniae, Streptococcus hemolyticus, Corynebacterium diphtheriae, Candida, and the like.

2. Gram-negative bacteria include Neisseria meningitidis, Neisseria gonorrhoeae, Haemophilus, Moraxella, Kashibhami, B. pertussis, Enterobacter, Pseudomonas aeruginosa and Alcaligenes.

3. The corresponding bacteria can be isolated from the pharynx of patients with whooping cough and diphtheria.

4. Acute pharyngitis, nasal abscess, and sinusitis are caused by Staphylococcus aureus, hemolytic streptococcus, and Pseudomonas aeruginosa.

5. Many infections of the ear, nose and throat are caused by anaerobic bacteria.

Precautions

(1) When collecting specimens, try to avoid contamination of bacteria that are normally settled. You can use a sterile cotton swab to wipe the surface in the affected area before taking the specimen. If there is a pseudo-membrane, use a sterile tweezers to peel off the pseudo-membrane for examination. If there is an abscess, pus should be taken for examination.

(2) According to the requirements of aseptic operation, the test tube mouth is placed on the flame of alcohol lamp for disinfection, then the swab is inserted into the test tube, and the cotton plug is sent for inspection.

Inspection process

The sterile colonies are routinely used to collect specimens from clinical care, and the cultured colonies are separated, purified and chemically identified.

Not suitable for the crowd

Those who do not have an indication for examination should not do this check.

Adverse reactions and risks

It may cause some irritation to the throat, but it is generally not a problem.