risk factor cryptosporidium
TRANSCRIPT
![Page 1: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/1.jpg)
62nd Annual Meeting of the SoutheasternSan Juan, Porto Rico, USA, March 20 – 21 2013
Ketty Balthazard-Accou*, Patrice Agnamey, Elmyre Clervil, Evens Emmanuel
Laboratoire de Qualité de l’Eau et de l’EnvironnementUniversité Quisqueya
218, Avenue Jean Paul II, Haut de Tugeau, Port-au-Prince, HaitiEmail: [email protected]
![Page 2: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/2.jpg)
Cryptosporidium in Haiti
� Cryptosporidiosis isresponsible for 17.5% ofacute diarrhea in childrenless than 2 years-old� 30% of chronicdiarrhoeas in patientsdiarrhoeas in patientsinfected by HIV�In Port-au-Prince,Cryptosporidium oocystswere detected in surfacewater and in public watersupplies
![Page 3: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/3.jpg)
Global view on sanitation in Haiti
Feco-oral
![Page 4: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/4.jpg)
� Port-au-Prince groundwater are exposed to latrine effluents, septic tanks and urban wastewater
� Since limestone is the main geological factor of Haiti, and all the cities have the same urban characteristics: groundwater of
Research considerations
characteristics: groundwater of Les Cayes, and Cap-Haitian are also contaminated by Cryptosporidium
![Page 5: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/5.jpg)
Analyze the different risk factors associatedwith transfers of Cryptosporidium oocystsin groundwater from three important citiesof Haiti: Port-au-Prince, Cap-Haitian and
Purpose of this work
of Haiti: Port-au-Prince, Cap-Haitian andles Cayes
![Page 6: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/6.jpg)
Framework of health risk assessment (NRC, 1983)
![Page 7: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/7.jpg)
Risks factors
A risk factor is an element belonging to an individualor originating from an environment liable to causean illness, trauma or another negative impact onthe development of the human organism(Fougeyrollas et al, 1998).(Fougeyrollas et al, 1998).
![Page 8: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/8.jpg)
Conceptual model
Transf
er
Targ
et
Management of urban sanitation services (wastewater, human excreta and animal)
Soil
Groundwater
Targ
et
Effect
s
C.h. : Human consumers (cryptosporidiosis: acute diarrhea andchronic abdominal pain, fever and myalgia; …)
C.h.
Groundwater
Tap water
![Page 9: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/9.jpg)
Studies sites
Materials and methods
![Page 10: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/10.jpg)
Les Cayes,South County’s chief city
Map of the hydrological south west region of Haiti
![Page 11: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/11.jpg)
Port-au-Prince, the national capital of the Republic of Haiti
Map of the hydrological center south region of Haiti
![Page 12: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/12.jpg)
Map of Cap-Haïtian water cathment North County’s chief city
![Page 13: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/13.jpg)
Sampling points
� The water samples were collected from the 21sites in the conditions defined by standardAFNOR-NFT 90-455 of July 2001.
� Water samples were taken in December 2009,October 2010 and January 2011.October 2010 and January 2011.
� The sampling points were chosen according tothe water supply points of the population(reservoir, drilling, spring, surface andgroundwater).
![Page 14: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/14.jpg)
Filtration of the samples
� In the field� Water filtration using
Envirochek® cartridgescartridges
� At the laboratory� immunomagnetic
separation (IMS)� immunofluorescence
essay (FA).
![Page 15: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/15.jpg)
Table 1: Results of Cryptosporidium oocysts detection
![Page 16: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/16.jpg)
Conclusion and Perspectives• The contamination of untreated public water supplies
used for human consumption in the cities of Port-au-Prince, Cap-Haitian and Les Cayes byCryptosporidium is a significant environmental andpublic health concerns.
• Since groundwater is contaminated by• Since groundwater is contaminated byCryptosporidium, it seems interesting to study thehydrodynamic and transfer mechanisms governingthe presence of these protozoan in saturated zone.
• In order to develop appropriate treatments, it shouldbe necessary to study the efficiency of somematerials (activated carbon, zeolite, and quartz) inoocysts adsorption.
![Page 17: Risk factor Cryptosporidium](https://reader031.vdocument.in/reader031/viewer/2022032221/55b96f85bb61ebe3798b46e9/html5/thumbnails/17.jpg)
THANK YOU FOR YOUR ATTENTIONFOR YOUR ATTENTION