2005
DOI: 10.1186/1471-2334-5-72
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Population-based laboratory surveillance for Giardia sp. and Cryptosporidium sp. infections in a large Canadian health region

Abstract: Background: Giardia lamblia (intestinalis) and Cryptosporidium parvum are the two most important intestinal parasites infecting North Americans but there is a paucity of active population-based surveillance data from Canada. This study determined the incidence of and demographic risk factors for developing Giardia sp. and Cryptosporidium sp. infections in a general Canadian population.

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Cited by 51 publications
(32 citation statements)
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“…In addition to recognized outbreaks, low levels of communityacquired giardiasis and cryptosporidiosis have long been observed in the United States and Canada. Laboratory-based surveillance estimates (1999 to 2002) of the incidence of Giardia and Cryptosporidium infections in Calgary, Canada, were 19.6 and 6.0, respectively, per 100,000 residents per year (38). In the same general time frame, infection rates in the United States based upon case reports varied between 6.9 and 8.5 infections per 100,000 per year for Giardia and between 1.0 and 1.3 infections per 100,000 per year for Cryptosporidium (23,24).…”
mentioning
confidence: 99%
“…In addition to recognized outbreaks, low levels of communityacquired giardiasis and cryptosporidiosis have long been observed in the United States and Canada. Laboratory-based surveillance estimates (1999 to 2002) of the incidence of Giardia and Cryptosporidium infections in Calgary, Canada, were 19.6 and 6.0, respectively, per 100,000 residents per year (38). In the same general time frame, infection rates in the United States based upon case reports varied between 6.9 and 8.5 infections per 100,000 per year for Giardia and between 1.0 and 1.3 infections per 100,000 per year for Cryptosporidium (23,24).…”
mentioning
confidence: 99%
“…En contraste, otros autores demuestran una mayor distribución de casos entre los menores de cinco años (14,15,21). La encuesta de 1980 mostró también una mayor prevalencia en los preescolares, 31,1%, que en los niños entre 5 y 14 años de edad, 21,7% (8).…”
Section: Discussionunclassified
“…Por tanto, se esperaría que el riesgo de infección por G. duodenalis fuera mayor en quienes carecen de vivienda propia en comparación con quienes la poseen, como se ha encontrado en otras investigaciones (12,14). El no haber encontrado esta asociación en este estudio se explica posiblemente por el hecho de El no tener como fuente principal de agua para consumo un acueducto sino la obtenida de quebradas, ríos o pozos profundos, se ha reportado como factor de riesgo por otros autores (10,14) y se explica, principalmente, por la presencia de una mayor concentración de quistes de este protozoario en las aguas no tratadas adecuadamente. Esta asociación también se encontró en este estudio, a pesar de que el acueducto veredal de La Virgen no implica tratamiento del agua sino solamente su transporte.…”
Section: Discussionunclassified
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“…The dieoff rate of Cryptosporidium oocysts in water is 0.005-0.037 10 log-units day 21 under natural environmental conditions (Medema et al, 2006). The potential risk of infection is high for both humans (especially immunocompromised individuals, malnourished children and pregnant women) and animals (particularly pets and livestock in feedlots) (Laupland & Church, 2005;Laupland, 2004;BuduAmoako et al, 2011). Due to the lack of prophylactic and therapeutic measures against cryptosporidiosis, the mortality rate in humans is an emerging public health issue worldwide (Kothavade, 2011).…”
Section: Introductionmentioning
confidence: 99%