Bacitracin Bacteriostatic Test

The bacitracin bacteriostatic test is based on the principle that group A streptococci are almost 100% sensitive to bacitracin, while other group streptococci are generally resistant to bacitracin. Therefore, the test can identify streptococcus. Inappropriate crowd: Those who are severely allergic to penicillin. Contraindications before examination: Penicillin skin test should be done before administration. Basic Information Specialist classification: Infectious disease inspection and classification: biochemical examination Applicable gender: whether men and women apply fasting: not fasting Tips: Inappropriate people: those who are allergic to penicillin. Normal value The type and proportion of the flora in the body are normal, and the human body is in a dynamic balance. Clinical significance Mainly used for the identification of group A and non-group A streptococci. Abnormal results: Disease caused by group A streptococcus 1. Suppurative inflammation is invaded by skin wounds, causing suppurative inflammation of the skin and subcutaneous tissues, such as sputum, cellulitis, erysipelas, and the like. Dilation along the lymphatic vessels, causing lymphangitis, lymphadenitis, sepsis, etc., through the respiratory tract invasion, often have acute tonsillitis, angina, and spread around causing abscess, otitis media, mastoiditis, bronchitis, pneumonia. Unhygienic delivery, infection through the birth canal, resulting in "calorie fever." 2. Scarlet fever An acute respiratory infection caused by a group A streptococci that produces a pyrogenic exotoxin. The clinical features are fever, angina, diffuse skin rash, and obvious desquamation after rash. 3, rheumatic fever caused by various types of Streptococcus group A, clinical manifestations of arthritis, myositis. Precautions Inappropriate crowd: severely allergic to penicillin Contraindications before examination: Penicillin skin test should be done before administration. Requirements for inspection: 1, local stimulating reaction is strong, and the solubility is small, it is not suitable for intramuscular injection; the concentration of intravenous injection or the rapid infusion rate will also cause local pain, should use dilute liquid or slow down. 2, side effects of digestive tract reactions (including nausea, vomiting, anorexia, occasionally burning and stomach pain in the upper abdomen); numbness in the mouth, face and limbs; severe muscle tremors. Inspection process METHODS: The broth culture of the test bacteria was evenly spread on a blood agar plate with a cotton swab. After drying, a 0.04 U bacitracin paper was attached and incubated at 35 ° C for 18-24 hours. The results were observed. Results: The diameter of the inhibition zone was more than 10mm, which was sensitive, and less than 10mm was resistant. Not suitable for the crowd no. Adverse reactions and risks no.