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Comparing Cell Culture and Mouse Assays for Measuring Infectivity of Cryptosporidium (Paperback) - Paul A. Rochelle, Marilyn M. Marshall, Jane Mead
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Paul A. Rochelle, Marilyn M. Marshall, Jane Mead:
Comparing Cell Culture and Mouse Assays for Measuring Infectivity of Cryptosporidium (Paperback) - Livres de poche

2005, ISBN: 1843399156

ID: 2690066444

[EAN: 9781843399155], Neubuch, [PU: Iwa Publishing, United Kingdom], Medical|Toxicology, Science|Life Sciences|Bacteriology, Science|Life Sciences|Biochemistry, Science|Life Sciences|Cytology, Technology, Language: English . Brand New Book ***** Print on Demand *****.Cell culture techniques are routinely used for measuring the infectivity of a wide range of human pathogens. A variety of different cell culture systems and detection methodologies have been applied to Cryptosporidium parvum. However, the correlation between cell culture methods and animal infectivity assays has not been thoroughly investigated. Although many cell culture methods have been developed for C. parvum, it has not been proven that infectivity in cell culture is a good indicator of the ability of oocysts to cause infections in animals. The objective of this research was to compare in-vitro cell culture methods with a mouse assay for measuring infectivity of C. parvum oocysts. The specific objectives were to (1) compare the dose response and sensitivity of cell culture and mouse assays with multiple isolates; (2) compare infectivity methods with oocysts exposed to environmental water samples; (3) determine the reproducibility and variability of the methods; and (4) compare cell culture and animal assays for assessing ozone and UV disinfection.For untreated oocysts, challenge doses were enumerated by flow cytometry.Dose response curves were constructed by regression analysis of oocyst dose against a logistic transformation of the proportional infectivity and the 50 infectious doses for each isolate were calculated by solving the regression for a logit value of zero. Infections in CD-1 mice were detected by microscopy following staining with hematoxylin and eosin. Infection in HCT-8 and Caco-2 cells was detected by C. parvum-specific RT-PCR. In MDCK cells, infection was detected using immunofluorescence. For disinfection studies, oocysts were exposed to UV using a medium-pressure, collimated beam apparatus and inactivation was measured as the difference in ID50 of unexposed and UV-exposed oocysts. Oocysts were exposed to ozone using batch, semi-batch, and single continuously stirred tank reactors at 1, 5, and 15 C.This investigation demonstrated that in-vitro cell culture was equivalent with a mouse assay for measuring infectivity of untreated C. parvum oocysts and should therefore be considered a practical alternative for assessing the potential of oocysts to cause infection.However, the high levels of variability displayed by mouse and cell culture methods indicated that infectivity and disinfection experiments should be limited to discerning relatively large differences. Of the three cell culture assays, the HCT-8/RT-PCR method displayed the closest agreement with the CD-1 mouse assay. C. hominis was infectious in HCT-8 cells but did not infect mice. Similar results were obtained with CD-1 mice and HCT-8 cells for measuring infectivity of oocysts that had been exposed to environmental water for 35 days. There was also very good agreement between HCT-8 cell culture and CD-1 mouse assays for measuring UV inactivation of C. parvum. A medium-pressure UV dosage of 5.6 mJ/cm2 resulted in 2-log10 inactivation. The shapes of ozone inactivation curves were generally the same for mouse and cell culture derived data although the CD-1 mouse assay typically generated 0.5 to 1-log10 higher levels of inactivation than HCT-8 cells. In addition, there was a stimulatory response in oocysts exposed to ozone below 20 mg.min/L when assayed by HCT-8 cell culture.Consequently, further research is necessary to understand the response of oocysts to ozone when inactivation is assessed by cell culture methods. The water industry should adopt in-vitro cell culture as a routine method for measuring the infectivity of waterborne C. parvum and C. hominis oocysts. This project has demonstrated that cell culture has equivalency with the standard CD-1 mouse assay and cell culture assays can be applied to oocysts recovered from water using approved methods. However, there needs to be a thorough, robust, and well-controlled study to compare the various cell culture-based assays for measurin

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Comparing Cell Culture and Mouse Assays for Measuring Ineffectivity of Cryptosporidium - Rochelle, Paul A.; Marshall, Marilyn Marilyn; Mead, Jan
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Rochelle, Paul A.; Marshall, Marilyn Marilyn; Mead, Jan:
Comparing Cell Culture and Mouse Assays for Measuring Ineffectivity of Cryptosporidium - Livres de poche

2005, ISBN: 1843399156, Lieferbar binnen 4-6 Wochen Frais d'envoiVersandkostenfrei innerhalb der BRD

ID: 9781843399155

Internationaler Buchtitel. In englischer Sprache. Verlag: AWWARF, 136 Seiten, L=279mm, B=210mm, H=7mm, Gew.=322gr, [GR: 26760 - TB/Biochemie/Biophysik], [SW: - Science], Kartoniert/Broschiert, Klappentext: The objective of this research was to compare in-vitro cell culture methods with a mouse assay for measuring infectivity of Cryptosporidium parvum oocysts. The specific objectives were to (1) compare the dose response and sensitivity of cell culture and mouse assays with multiple isolates; (2) compare infectivity methods with oocysts exposed to environmental water samples; (3) determine the reproducibility and variability of the methods; and (4) compare cell culture and animal assays for assessing ozone and UV disinfection. The objective of this research was to compare in-vitro cell culture methods with a mouse assay for measuring infectivity of Cryptosporidium parvum oocysts. The specific objectives were to (1) compare the dose response and sensitivity of cell culture and mouse assays with multiple isolates; (2) compare infectivity methods with oocysts exposed to environmental water samples; (3) determine the reproducibility and variability of the methods; and (4) compare cell culture and animal assays for assessing ozone and UV disinfection.

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Comparing Cell Culture And Mouse Assays For Measuring Infectivity Of Cryptosporidium - Paul  A. Rochelle, Marilyn Marilyn Marshall, Jan Mead
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Paul A. Rochelle, Marilyn Marilyn Marshall, Jan Mead:
Comparing Cell Culture And Mouse Assays For Measuring Infectivity Of Cryptosporidium - nouveau livre

ISBN: 9781843399155

Paul A. Rochelle, Marilyn Marilyn Marshall, Jan Mead,Paperback,Series: AwwaRF Report Series, English-language edition,Pub by IWA Publishing Books Books ~~ Science~~ Life Sciences ~~ Biochemistry Comparing-Cell-Culture-and-Mouse-Assays-for-Measuring-Infectivity-of-Cryptosporidium~~Paul-A-Rochelle IWA Publishing The objective of this research was to compare in-vitro cell culture methods with a mouse assay for measuring infectivity of Cryptosporidium parvum oocysts. The specific objectives were to (1) compare the dose response and sensitivity of cell culture and mouse assays with multiple isolates; (2) compare infectivity methods with oocysts exposed to environmental water samples; (3) determine the reproducibility and variability of the methods; and (4) compare cell culture and animal assays for assessing ozone and UV disinfection.

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Comparing Cell Culture & Mouse Assays For Measuring Infectivity of Cryptosporidium - Unknown Awwa
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Unknown Awwa:
Comparing Cell Culture & Mouse Assays For Measuring Infectivity of Cryptosporidium - nouveau livre

ISBN: 9781843399155

Comparing Cell Culture & Mouse Assays For Measuring Infectivity of Cryptosporidium Unknown Awwa, Books, Science and Nature, Comparing Cell Culture & Mouse Assays For Measuring Infectivity of Cryptosporidium Books>Science and Nature The objective of this research was to compare in-vitro cell culture methods with a mouse assay for measuring infectivity of Cryptosporidium parvum oocysts. The specific objectives were to (1) compare the dose response and sensitivity of cell culture and mouse assays with multiple isolates; (2) compare infectivity methods with oocysts exposed to environmental water samples; (3) determine the reproducibility and variability of the methods; and (4) compare cell culture and animal assays for assessing ozone and UV disinfection.

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Détails sur le livre
Comparing Cell Culture and Mouse Assays for Measuring Ineffectivity of Cryptosporidium

The objective of this research was to compare in-vitro cell culture methods with a mouse assay for measuring infectivity of Cryptosporidium parvum oocysts. The specific objectives were to (1) compare the dose response and sensitivity of cell culture and mouse assays with multiple isolates; (2) compare infectivity methods with oocysts exposed to environmental water samples; (3) determine the reproducibility and variability of the methods; and (4) compare cell culture and animal assays for assessing ozone and UV disinfection.

Informations détaillées sur le livre - Comparing Cell Culture and Mouse Assays for Measuring Ineffectivity of Cryptosporidium


EAN (ISBN-13): 9781843399155
ISBN (ISBN-10): 1843399156
Livre de poche
Date de parution: 2005
Editeur: AWWARF
136 Pages
Poids: 0,322 kg
Langue: eng/Englisch

Livre dans la base de données depuis 03.12.2007 13:34:51
Livre trouvé récemment le 09.07.2017 17:22:52
ISBN/EAN: 1843399156

ISBN - Autres types d'écriture:
1-84339-915-6, 978-1-84339-915-5


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