Transcription of PURE CULTURE TECHNIQUES I. OBJECTIVES
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PURE CULTURE TECHNIQUES I. OBJECTIVES
Microbiology BIOL 275 Dr. Eby Bassiri 1 pure CULTURE TECHNIQUES I. OBJECTIVES To demonstrate good aseptic technique in CULTURE transfer or inoculation and in handling sterile materials. To demonstrate skill in isolation of organisms from a mixed CULTURE using selective and differential media. To isolate microorganisms from a wide variety of sources and describe their colonial morphology. II. INTRODUCTION Most environments carry a mixed microbial population. To fully appreciate the contribution of each group of organisms to the ecology of the mass, one must first dissect this mixed CULTURE to obtain single colonies. The single colony is transferred (picked) to a fresh medium to obtain a larger, homogeneous CULTURE that may be studied and characterized by a variety of TECHNIQUES . One such technique is called aseptic technique . Microbiologists and health workers use this technique to prevent contamination of cultures from outside sources and to prevent the introduction of potential disease agents into the human body (infection can occur through contamination of your hands and clothing with material from your bacterial cultures).
related enteric Gram negative rods. Included bile salts and crystal violet inhibit growth of Gram positive bacteria, Gram negative cocci and fastidious Gram negative rods. Lactose is the sole carbohydrate source. Lactose-fermenters produce colonies
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