Recreational beach water samples collected on weekends and weekdays during 11 consecutive summer weeks were tested for potentially viable Cryptosporidium parvum oocysts and Giardia lamblia cysts using the multiplexed fluorescence in situ hybridization (FISH) method. The levels of oocysts and cysts on weekends were significantly higher than on the weekdays (P<0.01). Concentrations of oocysts in weekend samples (n=27) ranged from 2 to 42 oocysts/L (mean: 13.7 oocysts/L), and cyst concentration ranged from 0 to 33 cysts/L (mean: 9.1 cysts/L). For the samples collected on weekdays (n=33), the highest oocyst concentration was 7 oocysts/L (mean: 1.5 oocysts/L), and the highest cyst concentration was 4 cysts/L (mean: 0.6 cysts/L). The values of water turbidity were significantly higher on weekends than on weekdays, and were correlated with the number of bathers and concentration of C. parvum oocysts and G. lamblia cysts (P<0.04). The study demonstrated positive relationships between number of bathers and levels of waterborne C. parvum oocysts and G. lamblia cysts in recreational beach water. It is essential to test recreational waters for Cryptosporidium and Giardia when numbers of bathers are greatest, or limit the number of bathers in a recreational beach area.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.watres.2007.05.009 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ozone disinfection of treated wastewater for inactivation of Cryptosporidium parvum for agricultural irrigation.
Water Environ Res
January 2025
Laboratorio Nacional para la Investigación en Inocuidad Alimentaria (LANIIA), Centro de Investigación en Alimentación y Desarrollo (CIAD), Culiacán, Sinaloa, Mexico.
The reliance on agriculture in many nations has increased the use of treated wastewater for irrigation. However, reclaimed water still poses health risks from resistant pathogens like Cryptosporidium spp. Ozone, a strong disinfectant, has been used in water treatment.
View Article and Find Full Text PDFUnlabelled: Once considered rare in eukaryotes, polycistronic mRNA expression has been identified in kinetoplastids and, more recently, green algae, red algae, and certain fungi. This study provides comprehensive evidence supporting the existence of polycistronic mRNA expression in the apicomplexan parasite . Leveraging long-read RNA-seq data from different parasite strains and using multiple long-read technologies, we demonstrate the existence of defined polycistronic transcripts containing 2-4 protein encoding genes, several validated with RT-PCR.
View Article and Find Full Text PDFRisk Factors and Circulating Subtypes of spp. and in Hospitalized Children in Mozambique.
Microorganisms
January 2025
Unidade de Parasitologia Médica, Grupo de Parasitas Oportunistas/VIH e Outros Parasitas, Global Health and Tropical Medicine, GHTM, Associate Laboratory in Translation and Innovation Towards Global Health, LA-REAL, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, 1349-008 Lisboa, Portugal.
spp. and are important diarrheal agents in children in developing countries. Little is known about their molecular epidemiology; as such, the objective of this study was to determine the risk factors and genetic diversity of both parasites in diarrheal samples in Mozambique.
View Article and Find Full Text PDFThe Evaluation of the Efficacy of a Novel Subunit Vaccine in the Prevention of -Caused Diarrhoea in Neonatal Calves.
Animals (Basel)
January 2025
Clinique Vétérinaire des Mazets, 15400 Riom es Montagnes, France.
()-caused calf diarrhoea (scours) is widespread and leads to calf mortality in cattle industries worldwide. A recent discovery of a glycopeptide epitope on the parasite recognized by a monoclonal antibody has led to the development of a new vaccine. It was designed for cows to pass on passive immunity to their neonatal calves.
View Article and Find Full Text PDFOccurrence and molecular characterization of Cryptosporidium oocysts in chickens from Egypt, and a meta-analysis for Cryptosporidium infections in chickens worldwide.
Vet Parasitol Reg Stud Reports
January 2025
Parasitology Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt. Electronic address:
Cryptosporidium is a leading cause of diarrhea in children and immunocompromised patients. Various animals and birds can also be infected with this protist, and Cryptosporidium zoonosis is common. A few reports have been published worldwide on Cryptosporidium infections in chickens.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!