DE LEON.pdf

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Background • Need to determine water quality (WQ) received much attention after the 1855 Salmonella outbreak (Snow & Budd, 1855) • To determine WQ, simple, reliable & rapid methods for detection & enumeration of microorganisms (MO) are necessary
• Pathogens are not detected easily & routine culturing not recommended • Methods developed to determine presence of other faecal microorganisms (FM) • Absence of these FM means pathogens unlikely to be present • Concept of “indicator organisms” was introduced in 1892 and is the basis for most microbial water quality standards
Page 1 and 2: Adequacy of Microbial Indicators of
Page 3: Adequacy of Microbial Indicators of
Page 7 and 8: • present when pathogens are pres
Page 9 and 10: Faecal Indicators Organisms include
Page 11 and 12: iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Page 13 and 14: The Problem
Page 15 and 16: Rationale • Region‟s heavy depe
Page 17 and 18: Objectives • To determine the ade
Page 19 and 20: Methodology
Page 21 and 22: Sampling • Samples collected in a
Page 23 and 24: Dominica
Page 25 and 26: Grenada
Page 27 and 28: Table 1. Standard Methods (2005) fo
Page 29 and 30: Data Compilation
Page 31 and 32: Number of true negatives • SPECIF
Page 33 and 34: Water Quality • Total of 713 mari
Page 35 and 36: Frequency at which the sample count
Page 37 and 38: Correlations between Indicators and
Page 39 and 40: Marine Water Fresh Water Sensitivit
Page 41 and 42: Conclusions & Recommendations More
Page 43: Percentage true and false positives

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