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Topic: Coliformes

In the News (Wed 22 May 13)

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	How do milking conditions affect the hygienic quality of raw milk? Case study from Moroccan dairy farms
		In the opposite, the low counts of staphylococci(milk samples from the hygienic class 3) are equally related (46.7%) to the milking profiles 1 and 2, which are mainly characterized by the presence of the calf during milking.
		Finally, milk samples in the hygienic class 1 (high faecal coliforms contamination) were almost equally associated to milking profiles number 1 and 2 (45 and 40%).
		This relationship between milk hygienic quality and the presence of a suckler calf is particularly obvious for faecal coliforms and staphylococci, whereas it is not significant for aerobic plate count and total coliforms.
	www.cipav.org.co /lrrd/lrrd18/7/srai18097.htm (3826 words)

	Revista de Saúde Pública - Microbiological quality of drinking water of urban and rural communities, Brazil (Site not responding. Last check: )
		Coliform bacteria are regarded as belonging to the genera Escherichia, Citrobacter, Enterobacter, and Klebsiella.
		Although coliform organisms may not always be directly related to the presence of fecal contamination or pathogens in drinking water, the coliform test is still useful for monitoring microbial quality of treated piped water supplies.
		Coliform bacteria should not be detectable in treated water supplies and, if so, suggest inadequate treatment, inability to maintain a disinfectant residual in the water distribution system, or excessive nutrients.
	www.scielo.br /scielo.php?script=sci_arttext&pid=S0034-89102003000200011 (2452 words)

	WCP Online: Coliform Bacteria: A Failed Indicator of Water Quality?
		Metabolically, total coliforms are defined as a group of closely related bacteria with the ability to ferment lactose, producing both acid and gas by-products when incubated at 35 degrees C for 48 hours.
		Fecal coliforms are a sub-group of the total coliform group of bacteria, differentiated by their thermotolerance, i.e., their ability to grow at 44.5 degrees C. Pathogens enter water via fecal contamination that can lead to severe and widespread human illness from drinking, swimming and bathing waters.
		Coliform bacteria have been used primarily by drinking water laboratories for microbial analysis of potable water, but are also used to evaluate food, pharmaceuticals, distribution lines, treated effluents, bottled water, groundwater, marine water and other environmental samples.
	www.wcponline.com /column.cfm?T=T&ID=2349 (1916 words)

	Predicción del comportamiento de coliformes fecales en la Bahía de Acapulco
		En cada estación de muestreo se midieron: pH, temperatura, coliformes fecales, demanda bioquímica de oxígeno y oxígeno disuelto a tres diferentes profundidades.
		Los factores que se consideraron para esta segmentación fueron: estratificación térmica vertical, profundidad de la bahía, características del agua en cuanto a coliformes fecales, y ubicación de las descargas de aguas residuales.
		Debido a restricciones de espacio, sólo se presentarán los resultados del escenario en el que se cumplen con las normas de calidad en cuanto a coliformes fecales en todos los segmentos de la bahía y que además significó el menor grado de tratamiento de las descargas de aguas residuales.
	www.mty.itesm.mx /die/ddre/transferencia/Transferencia46/eli-01.htm (1459 words)

	Sus aux coliformes
		Pour son mémoire, qu'elle achève avec les beaux jours, elle s'est particulièrement intéressée à la présence de coliformes et à l'identification des facteurs responsables de leurs variations dans le temps, dans une source d'eau potable.
		Les coliformes sont des micro-organismes (bactéries et protozoaires) que l'on retrouve dans la région intestinale des hommes, des animaux à sang chaud et dans les eaux de surface.
		Son intérêt pour les coliformes provient d'abord d'un goût prononcé pour l'environnement –elle possède un bac en microbiologie– mais aussi de son père, conseiller municipal de Notre-Dame-du-Lac : "j'allie ainsi ma curiosité pour les affaires municipales et mon intérêt pour ce qui est susceptible d'affecter l'environnement".
	www.sciencepresse.qc.ca /archives/quebec/capque0704b.html (577 words)

	Properties in Costa Rica
		Aguas son aptas para nadar y están prácticamente libres de coliformes fecales
		Estudios ordenados por hoteleros de playa Langosta y análisis periódicos del Instituto Costarricense de Acueductos y Alcantarillados (AyA) coinciden en que el mar allí está prácticamente libre de coliformes fecales.
		En un estudio solicitado por hoteleros de Langosta al Laboratorio privado Biotec, nueve puntos de muestreo registraron valores menores a los 47 coliformes fecales por cada 100 mililitros de agua.
	blog.propertiesincostarica.com (8671 words)

	[No title]
		Qualité de l'eau -- Recherche et dénombrement des Escherichia coli et des bactéries coliformes -- Partie 1: Méthode par filtration sur membrane
		La présente partie de ISO 9308 décrit une méthode de référence (essai standard) pour la recherche et le dénombrement des Escherichia coli et des bactéries coliformes présents dans l'eau destinée à la consommation humaine.
		En raison du caractère peu sélectif de cette méthode, la flore bactérienne générale peut perturber la fiabilité du dénombrement des bactéries coliformes et des E. coli, par exemple, dans certaines eaux potables, telles que les eaux de puits peu profonds, qui n'ont pas été désinfectées et abritent une importante flore interférente.
	www.iso.org /iso/fr/CatalogueDetailPage.CatalogueDetail?CSNUMBER=26404&ICS1=7&ICS2=100&ICS3=20&scopelist=CATALOGUE (336 words)

	Directory of open access journals
		Determinou-se a contagem total de: mesófilos aeróbios, psicrotróficos, bactérias láticas, coliformes totais, coliformes fecais e mofos e leveduras.
		Porém, em soluções com pH 6,0, as contagens de mesófilos foram reduzidas em três ciclos logaritmos e em dois ciclos para microrganismos psicrotróficos, bactérias láticas e mofos e leveduras, eliminando coliformes totais e fecais após 15min de contato com o sanitizante.
		As maiores reduções da carga microbiana, com eliminação dos coliformes totais e fecais, foram obtidas quando se utilizou hipoclorito de sódio, a 100 ou 200mg L-1, com pH ajustado para 6,0 e tempo de exposição de 15 minutos.
	www.doaj.org /abstract?id=125954&toc=y (295 words)

	Directory of open access journals
		O presente estudo teve como objetivo avaliar a eficiência de substratos e de espécies vegetais, nativas ou naturalizadas da região de Goiânia-GO, na remoção de coliformes do esgoto, num sistema de tratamento do tipo zona de raízes com fluxo subsuperficial descendente, precedido de decantação.
		O sistema de tratamento do tipo zona de raízes mostrou-se bastante eficiente na remoção de coliformes, atingindo níveis próximos à totalidade.
		As espécies vegetais comportaram-se de maneira semelhante na remoção dos coliformes fecais e o substrato com casca de coco mostrou-se menos eficiente que os substratos com areia.
	www.doaj.org /doaj?func=abstract&id=173861&recNo=8&toc=1 (283 words)

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