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INFORME LABORATORIO
Bl22
Laboratorio Nº8: Observación de colonias
jueves, 17 de junio de 2010
Observar colonias a la lupa y distinguir sus características principales
Placa petric Agar gelatina Agar almidon Contador de colonias lupa Bacilus Escherichia-coli Proteus sp Pseudomonas Salmonella Encienda el mechero bunsen ( espera un par de minutos ) Tome el tubo de ensayo de la gradilla que contiene Escherichia-coli y ábralo usando su dedo meñique y flamee el tubo de ensayo Extraiga una pipeta flaméela y extraiga una alícuota de microorganismo teniendo precaución de no alejarse demasiado de la campana de esterilidad formada por el mechero Divida la capsula de petri en dos y rotúlela con las siglas de los antibióticos que va a utilizar Manteniendo la capsula petri bajo la campana de esterilidad, abra la placa cuidadosamente y deposite la alícuota de microorganismo Tome el asa de Drigalsky de el vaso con alcohol Flaméela cuidosamente Enfrié el asa en la tapa de la placa y esparza la alícuota por sobre el agar teniendo cuidado de no romper el agar y de alcanzar todas las partes de la placa para formar una base homogénea Tome el papel antibiótico con la ayuda de una pinza y deposítelo en el centro de la zona que le corresponde Finalmente Llévelo a la estufa de cultivo a 37º C M.O
Opacidad
Elevación
forma
Borde
Cromogenesis
Consistencia
Bacilus 1
Orillas translucidas centro opaco
Levemente umbilicado
Claramente circular
Liso-ondulado
Blanco amarillento
Mucosa
Bacilus 2
Transparente concentrado al centro
Umbilical convexa
Circular
Ondulado
Blanco lechoso
Mucosa
e.coli 1
Opaca
Umbilical
Circular
Ondulado
Blanco lechoso
Mucosa
e.coli 2
Opaca
Convexa
Circular
Ondulado
Blanco lechoso
Mucosa
Proteus sp
Borde transparente centro opaco
Umbilical
Circular
Liso levemente ondulado
Transparente blanca
Mucosa
Pseudomonas
Translucida
Convexa
Irregular
Lobulado
Blanco amarillento oscuro
Mucosa
Salmonella
Translucida al centro, bordes opacos
Cóncava
Irregular
Borde bien lobulado
Blanca en términos generales
Mucosa
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Enviado por: Edmundo Idioma: castellanoPaís: Chile