Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantification of Giardia and Cryptosporidium in surface water: a risk assessment and molecular characterization

Full text
Author(s):
Bataiero, M. O. [1] ; Araujo, R. S. [2] ; Nardocci, A. C. [3, 4] ; Matte, M. H. [4] ; Sato, M. I. Z. [2, 3] ; Lauretto, M. S. [3, 5] ; Razzolini, M. T. P. [3, 4]
Total Authors: 7
Affiliation:
[1] Sanit Surveillance Ctr, Div Act Regarding Environm, Ave Dr Arnaldo 351 Anexo III, Sao Paulo, SP - Brazil
[2] Environm Co State Sao Paulo, Dept Environm Anal, Av Prof Frederico Hermann Jr 345, Sao Paulo - Brazil
[3] NARA Ctr Res Environm Risk Assessment, Av Dr Arnaldo 715, BR-01246904 Sao Paulo - Brazil
[4] Univ Sao Paulo, Sch Publ Hlth, Av Dr Arnaldo 715, 1 Andar, BR-01246904 Sao Paulo - Brazil
[5] Univ Sao Paulo, Sch Arts Sci & Humanities, R Arlindo Bettio 1000, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY; v. 19, n. 6, p. 1823-1830, SEP 2019.
Web of Science Citations: 0
Abstract

This study aimed to estimate the annual probability of Giardia and Cryptosporidium infection for a population supplied by contaminated drinking water sources. Parasites were quantified by the USEPA Method 1623.1/2012. Annual risk was estimated using the quantitative microbial risk assessment (QMRA) approach. Genotyping was performed using specific primers based on the 18S rRNA gene for Cryptosporidium and gdh gene for Giardia. Giardia was detected in 83.3% of the samples (<0.1 to 8.6 cysts/L) and Cryptosporidium in 37.5% (<0.1 to 2 oocysts/L). In general, annual risk values for Giardia were 1 log higher when compared with those obtained for Cryptosporidium. Giardia intestinalis A and B were present as well as C. hominis and C. parvum. The lack of protection measures for the water supply catchment point put the population's health at risk. The results provide data to support decision-makers to take actions to improve environmental quality resulting in a positive impact on consumers' health. (AU)

FAPESP's process: 12/12750-1 - Quantification of Giardia and Cryptosporidium in water source for public supply and risk assessment of infection via water ingestion in a city of the Metropolitan Region of São Paulo (MRSP)
Grantee:Maria Tereza Pepe Razzolini
Support Opportunities: Regular Research Grants