Detection of Toxoplasma gondii-like oocysts in cat feces and estimates of the environmental oocyst burden
Detection of Toxoplasma gondii-like oocysts in cat feces and estimates of the environmental oocyst burden
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DOI：
10.2460/javma.231.11.1676
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发表时间：
2007-12-01
影响因子：
1.9
通讯作者：
Conrad, Patricia A.
中科院分区：
文献类型：
--
作者：
Dabritz, Haydee A.;Miller, Mellisa A.;Conrad, Patricia A.
目的：根据猫的排泄率和非猫的排泄率，评估显微镜检测弓形虫卵囊和环境负荷的敏感性。设计横断面调查：抽样人群-326只猫的粪便样本。从猫收容所、兽医诊所、养猫家庭和室外地点采集粪便样本，并用硫酸锌粪便漂浮法进行检测。结果在加利福尼亚州莫罗湾地区的326只猫的粪便中只有3份(0.9%)含有弓形虫卵囊。根据该地区室外猫粪的估计吨数，环境中的年负担估计为94至4671个卵囊/米(2)(9至434个卵囊/英尺(2))。结论和临床相关性-尽管目前和以前的调查发现猫排出弓形虫卵囊的比例很低，持续时间很短，但猫在最初感染期间排出的卵囊的数量本身就可能导致严重的环境污染。兽医可能希望让猫主人意识到允许猫在户外大小便对人类和野生动物健康构成的潜在威胁。
Objective-To estimate the analytic sensitivity of microscopic detection of Toxoplasma gondii oocysts and the environmental loading of T gondii oocysts on the basis of prevalence of shedding by owned and unowned cats.Design-Cross-sectional survey.Sample Population-326 fecal samples from cats.Procedures-Fecal samples were collected from cat shelters, veterinary clinics, cat-owning households, and outdoor locations and tested via ZnSO4 fecal flotation.Results-Only 3 (0.9%) samples of feces from 326 cats in the Morro Bay area of California contained T gondii-ike oocysts. On the basis of the estimated tonnage of cat feces deposited outdoors in this area, the annual burden in the environment was estimated to be 94 to 4,671 oocysts/m(2) (9 to 434 oocysts/ft(2)).Conclusions and Clinical Relevance-Despite the low prevalence and short duration of T gondii oocyst shedding by cats detected in the present and former surveys, the sheer numbers of oocysts shed by cats during initial infection could lead to substantial environmental contamination. Veterinarians may wish to make cat owners aware of the potential threats to human and wildlife health posed by cats permitted to defecate outdoors.