Exercise 2 Cover Exercise1 EXERCISE #2 GRAM-POSITIVE COCCI AND ANTIBIOTICS Exercise2 FIRST SESSION Exercise3 FOCI 1.Identification Streptococcus by Macroscopic,Microscopic and Metabolic Exercise4 Characteristics Exercise5 2.Antibiotic susceptibility test Exercise6 Exercise7 Identification of Bacterial Genera Clinical Lactose case studies Suggestions Lactose+ Lactose Indole Glucose+ Escherichia Enebacter Mofile Non-motie,HS- Pseudomoras Urea+ Urea Shigella Protus Salmonella alm ost always bes gins as a m rphological study of the unknown sand the clincin nta requrea detot organism is a gram-positive,nonspore forming rod,then one needs to know whether or not it is acid-fast. Motility determinations are also significant especially with the gram-negative rods.These facts along with the cultural characteristics will enable the investigator to ultimately arrive at one of the nine groups of genera.A presumptive identification of the genus may also be possible at this time especially if symptoms of the clinical infection are known.Physiological tests and/or serologies are subsequently performed to confirm the genus as well as to determine the species of the etiologic agent. A.STREPTOCOCCI file://CINDOWS/Desktop/clown/Microb Lab Web 2001/Exercise2/exercise2.htm(1 of10)[/3/0:0:02 PM] Cover Exercise1 Exercise2 Exercise3 Exercise4 Exercise5 Exercise6 Exercise7 Clinical case studies Suggestions Hit Counter EXERCISE #2 GRAM-POSITIVE COCCI AND ANTIBIOTICS FIRST SESSION : FOCI Identification Streptococcus by Macroscopic, Microscopic and Metabolic Characteristics. 1. 2. Antibiotic susceptibility test Identification of Bacterial Genera The identification procedure almost always begins as a morphological study of the unknown clinical isolate. The microbiologist and the clinician initially require a determination so as to whether the organism is gram-positive or gram-negative, whether it is a rod or coccus, the predominant type of arrangement, and whether or not spores are formed. If the organism is a gram-positive, nonspore forming rod, then one needs to know whether or not it is acid- fast. Motility determinations are also significant especially with the gram-negative rods. These facts along with the cultural characteristics will enable the investigator to ultimately arrive at one of the nine groups of genera. A presumptive identification of the genus may also be possible at this time especially if symptoms of the clinical infection are known. Physiological tests and/or serologies are subsequently performed to confirm the genus as well as to determine the species of the etiologic agent. A. STREPTOCOCCI Exercise 2 file:///C|/WINDOWS/Desktop/clown/Microb Lab Web 2001/Exercise2/exercise2.htm (1 of 10) [8/31/2002 4:30:02 PM]