Detection of Toxoplasma gondii-like oocysts in cat feces and estimates of the environmental oocyst burden

被引:107
作者
Dabritz, Haydee A.
Miller, Mellisa A.
Atwill, E. Robert
Gardner, Ian A.
Leutenegger, Christian M.
Melli, Ann C.
Conrad, Patricia A.
机构
[1] IDEXX Vet Serv Inc, W Sacramento, CA 95605 USA
[2] Univ Calif Davis, Sch Vet Med, Dept Pathol, Davis, CA 95616 USA
[3] Univ Calif Davis, Sch Vet Med, Dept Microbiol, Davis, CA 95616 USA
[4] Univ Calif Davis, Sch Vet Med, Dept Immunol, Davis, CA 95616 USA
[5] Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USA
[6] Univ Calif Davis, Sch Vet Med, Dept Med & Epidemiol, Davis, CA 95616 USA
[7] Marine Wildlife Vet Care & Res Ctr, Calif Dept Fish & Game, Santa Cruz, CA 95060 USA
来源
JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION | 2007年 / 231卷 / 11期
关键词
D O I
10.2460/javma.231.11.1676
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
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.
引用
收藏
页码:1676 / 1684
页数:9
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