Effect of water suspended particles on the recovery of Cryptosporidium parvum from tomato surfaces
An increase in the number of outbreaks of foodborne disease associated with fresh produce consumption has been described. The objective of the present study was to evaluate the effect of water suspended particles during immersing/spraying disinfection processes and the recovery of Cryptosporidium pa...
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| Veröffentlicht in: | Journal of water and health 2007-12, Vol.5 (4), p.625-631 |
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| creator | Chaidez, Cristobal Soto, Marcela Campo, Nohelia Castro-del |
| description | An increase in the number of outbreaks of foodborne disease associated with fresh produce consumption has been described. The objective of the present study was to evaluate the effect of water suspended particles during immersing/spraying disinfection processes and the recovery of Cryptosporidium parvum oocysts from tomato surfaces. Tomatoes (Lycopersicum esculetum Mill.) were immersed/sprayed with chlorinated water with low and high suspended particle content (10 and 1,000 mg/l) containing 100, 1,000 or 10,000 oocysts/l. Tomatoes were evaluated after a contact time of 120 seconds and 30 seconds for immersing and spraying procedures, respectively. The immersing procedure showed a high recovery of C. parvum oocysts from the tomato surface when the concentration was 10,000 oocysts/l and 10 mg/l suspended particles (295+/-94 [mean+/-standard deviation]). High particle content affected oocyst recovery and dissolved particles exerted a chlorine demand reducing the disinfectant residual. In the spraying procedure, the highest recovery was observed with 10,000 oocysts/l (225+/-72). Our understanding is that the association of C. parvum oocysts with suspended particles might promote the oocyst deposition in the wash water tanks and that this interaction should be considered when evaluating the quality of the water. |
| doi_str_mv | 10.2166/wh.2007.048 |
| format | Article |
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The objective of the present study was to evaluate the effect of water suspended particles during immersing/spraying disinfection processes and the recovery of Cryptosporidium parvum oocysts from tomato surfaces. Tomatoes (Lycopersicum esculetum Mill.) were immersed/sprayed with chlorinated water with low and high suspended particle content (10 and 1,000 mg/l) containing 100, 1,000 or 10,000 oocysts/l. Tomatoes were evaluated after a contact time of 120 seconds and 30 seconds for immersing and spraying procedures, respectively. The immersing procedure showed a high recovery of C. parvum oocysts from the tomato surface when the concentration was 10,000 oocysts/l and 10 mg/l suspended particles (295+/-94 [mean+/-standard deviation]). High particle content affected oocyst recovery and dissolved particles exerted a chlorine demand reducing the disinfectant residual. In the spraying procedure, the highest recovery was observed with 10,000 oocysts/l (225+/-72). Our understanding is that the association of C. parvum oocysts with suspended particles might promote the oocyst deposition in the wash water tanks and that this interaction should be considered when evaluating the quality of the water.</description><identifier>ISSN: 1477-8920</identifier><identifier>EISSN: 1996-7829</identifier><identifier>DOI: 10.2166/wh.2007.048</identifier><identifier>PMID: 17878573</identifier><language>eng</language><publisher>England: IWA Publishing</publisher><subject>Animals ; Chlorination ; Chlorine ; Cryptosporidium ; Cryptosporidium parvum ; Cryptosporidium parvum - growth & development ; Cryptosporidium parvum - isolation & purification ; Disinfectants ; Disinfection ; Disinfection - methods ; Food ; Foodborne diseases ; Humans ; Lycopersicon esculentum ; Lycopersicon esculentum - parasitology ; Oocysts ; Outbreaks ; Particle Size ; Procedures ; Protozoa ; Recovery ; Spraying ; Tanks ; Tomatoes ; Wash water ; Water ; Water - chemistry ; Water filtration ; Water tanks</subject><ispartof>Journal of water and health, 2007-12, Vol.5 (4), p.625-631</ispartof><rights>Copyright IWA Publishing Dec 2007</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c383t-1a312149baf14cbdd16e2a698303f4a94a11a7536da145e7612104688a5a9d3f3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17878573$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chaidez, Cristobal</creatorcontrib><creatorcontrib>Soto, Marcela</creatorcontrib><creatorcontrib>Campo, Nohelia Castro-del</creatorcontrib><title>Effect of water suspended particles on the recovery of Cryptosporidium parvum from tomato surfaces</title><title>Journal of water and health</title><addtitle>J Water Health</addtitle><description>An increase in the number of outbreaks of foodborne disease associated with fresh produce consumption has been described. The objective of the present study was to evaluate the effect of water suspended particles during immersing/spraying disinfection processes and the recovery of Cryptosporidium parvum oocysts from tomato surfaces. Tomatoes (Lycopersicum esculetum Mill.) were immersed/sprayed with chlorinated water with low and high suspended particle content (10 and 1,000 mg/l) containing 100, 1,000 or 10,000 oocysts/l. Tomatoes were evaluated after a contact time of 120 seconds and 30 seconds for immersing and spraying procedures, respectively. The immersing procedure showed a high recovery of C. parvum oocysts from the tomato surface when the concentration was 10,000 oocysts/l and 10 mg/l suspended particles (295+/-94 [mean+/-standard deviation]). High particle content affected oocyst recovery and dissolved particles exerted a chlorine demand reducing the disinfectant residual. In the spraying procedure, the highest recovery was observed with 10,000 oocysts/l (225+/-72). Our understanding is that the association of C. parvum oocysts with suspended particles might promote the oocyst deposition in the wash water tanks and that this interaction should be considered when evaluating the quality of the water.</description><subject>Animals</subject><subject>Chlorination</subject><subject>Chlorine</subject><subject>Cryptosporidium</subject><subject>Cryptosporidium parvum</subject><subject>Cryptosporidium parvum - growth & development</subject><subject>Cryptosporidium parvum - isolation & purification</subject><subject>Disinfectants</subject><subject>Disinfection</subject><subject>Disinfection - methods</subject><subject>Food</subject><subject>Foodborne diseases</subject><subject>Humans</subject><subject>Lycopersicon esculentum</subject><subject>Lycopersicon esculentum - parasitology</subject><subject>Oocysts</subject><subject>Outbreaks</subject><subject>Particle Size</subject><subject>Procedures</subject><subject>Protozoa</subject><subject>Recovery</subject><subject>Spraying</subject><subject>Tanks</subject><subject>Tomatoes</subject><subject>Wash water</subject><subject>Water</subject><subject>Water - 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The objective of the present study was to evaluate the effect of water suspended particles during immersing/spraying disinfection processes and the recovery of Cryptosporidium parvum oocysts from tomato surfaces. Tomatoes (Lycopersicum esculetum Mill.) were immersed/sprayed with chlorinated water with low and high suspended particle content (10 and 1,000 mg/l) containing 100, 1,000 or 10,000 oocysts/l. Tomatoes were evaluated after a contact time of 120 seconds and 30 seconds for immersing and spraying procedures, respectively. The immersing procedure showed a high recovery of C. parvum oocysts from the tomato surface when the concentration was 10,000 oocysts/l and 10 mg/l suspended particles (295+/-94 [mean+/-standard deviation]). High particle content affected oocyst recovery and dissolved particles exerted a chlorine demand reducing the disinfectant residual. In the spraying procedure, the highest recovery was observed with 10,000 oocysts/l (225+/-72). Our understanding is that the association of C. parvum oocysts with suspended particles might promote the oocyst deposition in the wash water tanks and that this interaction should be considered when evaluating the quality of the water.</abstract><cop>England</cop><pub>IWA Publishing</pub><pmid>17878573</pmid><doi>10.2166/wh.2007.048</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of water and health, 2007-12, Vol.5 (4), p.625-631 |
| issn | 1477-8920 1996-7829 |
| language | eng |
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| source | MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Animals Chlorination Chlorine Cryptosporidium Cryptosporidium parvum Cryptosporidium parvum - growth & development Cryptosporidium parvum - isolation & purification Disinfectants Disinfection Disinfection - methods Food Foodborne diseases Humans Lycopersicon esculentum Lycopersicon esculentum - parasitology Oocysts Outbreaks Particle Size Procedures Protozoa Recovery Spraying Tanks Tomatoes Wash water Water Water - chemistry Water filtration Water tanks |
| title | Effect of water suspended particles on the recovery of Cryptosporidium parvum from tomato surfaces |
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