Exudado faríngeo paso a paso 🔬 (estreptococos en agar sangre)

This video demonstrates the complete procedure for throat swab analysis in the clinical laboratory, including primary inoculation on blood agar and microbiological identification of the cultures. It's important to clarify that this test and the bacteria considered pathogenic are indicated in cases of suspected bacterial pharyngitis, as other pathologies are not included in its scope (Vincent's angina, abscess, etc.). Real cases are presented in which characteristics compatible with beta-hemolytic streptococci are observed, along with the tests used for their identification: • Observation of hemolysis on blood agar • Catalase test • Bacitracin susceptibility • Trimethoprim susceptibility In addition, microorganisms that may present similar characteristics or be part of the differential diagnosis, such as Arcanobacterium haemolyticum, are discussed, as well as the limitations of throat swab analysis in detecting other pathogens such as Corynebacterium, Neisseria gonorrhoeae, and Chlamydophila pneumoniae. This content is intended for students, chemists, clinical laboratory personnel, and healthcare professionals interested in diagnostic microbiology. 📌 Educational material based on laboratory practice. #microbiology #clinicallaboratory #pharyngealswab #streptococcus #bloodagar #quimicovalencia #quimicovalencia Video Chapters: 00:00 Usefulness and limitations of pharyngeal swabs 01:36 Pharyngeal swab inoculation technique 04:59 Examples of negative pharyngeal swabs 05:51 Examples of positive pharyngeal swabs 06:48 Gram and catalase staining in positive pharyngeal cultures 08:08 Methodologies for identifying beta-hemolytic streptococci 09:29 Bacitracin and trimethoprim sensitivity testing for streptococci 14:45 Identification tests for Arcanobacterium haemolyticum 15:16 Pathogens not detectable by routine pharyngeal swab