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Veterinary Research Communications - 相似文献
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Parasitic zoonoses are common and widely distributed in the Southeast Asian region. However, the interactions between parasites, hosts and vectors are influenced by environmental, socio-cultural and livestock production changes that impact on the distribution, prevalence and severity of disease. In this review we provide an update on new knowledge in the context of ongoing changes for the food-borne pig associated zoonoses Taenia solium and Trichinella spp., the food-borne trematodes Opisthorchis viverrini and Clonorchis sinensis, the water-borne trematodes Schistosoma spp., the vector-borne zoonotic protozoa Plasmodium knowlesi and Leishmania spp. and the soil-borne zoonotic hookworm Ancylostoma ceylanicum. These various changes need to be considered when assessing or developing regional control programs or devising new research initiatives in a changing SE Asia. 相似文献
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对1983~1986年采集于渤海的鱼类感染复殖吸虫进行分析,结果表明:从外海到内海鱼类感染强度呈现加重的趋势。这种变化趋势受多种因素的影响,即水环境特点、鱼类的生态习性、复殖吸虫的群落结构、活物运输等。 相似文献
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Keyyu JD Kassuku AA Msalilwa LP Monrad J Kyvsgaard NC 《Veterinary research communications》2006,30(1):45-55
A cross-sectional study was carried out to determine the prevalence of gastrointestinal (GI) nematodes and flukes (Fasciola and amphistomes) infection in communally grazed traditional cattle, zero-grazed small-scale dairy cattle and intensively
grazed large-scale dairy cattle through examination of helminth eggs in faeces. Results indicated that the type of management,
especially the grazing habit, has a significant influence on the prevalence and intensity of GI nematodes and flukes. The
prevalence of GI nematodes in traditional, large-scale dairy and small-scale dairy cattle was 67%, 44.4% and 37%, respectively,
with the highest faecal egg counts in calves. The overall prevalence of Fasciola gigantica in traditional, large-scale dairy and small-scale dairy cattle was 63.8%, 46.2% and 28.4%, respectively. The prevalence of
amphistomes was 81.9%, 55.5% and 41.1% in traditional, large-scale dairy and small-scale dairy cattle, respectively. The high
prevalence of flukes in the traditional system was attributed to communal grazing and watering management practices. Stomach
flukes recovered in examined cattle at the abattoir were Calicophoron microbothrium and Cotylophoron jacksoni. About 42.1% of infected animals had both Fasciola and amphistomes. The prevalence of both GI nematodes and flukes varied greatly among villages and farms. The prevalence of
both Fasciola and amphistomes was higher in adults (58.5%, 75.2%) than in yearlings (36.5%, 51.5%) or calves (24.9%, 47.2%). The variation
in the prevalence of both GI nematodes and flukes among management and age groups within systems can be used as an entry point
towards rational use of anthelmintics for each management system. More studies on seasonal transmission pattern of all these
parasites are required in order to design rational, economic and locally sustainable parasite control programmes. 相似文献
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通过整理1983~1986年采集的渤海鱼类复殖吸虫标本,共发现复殖吸虫14科48属84种,主要分布在内海的塘沽、秦皇岛、黄骅等地。复殖吸虫多样性分布特征呈现由内海到外海逐渐递减的变化趋势。这种变化趋势受物种数、优势种的聚集强度、鱼类多样性、水环境等因素的影响。 相似文献
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Parasitism, water temperature and life history characteristics of the freshwater fish Gobiomorphus breviceps Stokell (Eleotridae) 总被引：1，自引：0，他引：1
Abstract – Life history traits can vary among populations of the same fish species in response to selective pressures exerted by the local environment. Here we used inter-population comparisons to investigate the effects of parasitism and variability in water temperature on life history traits in a New Zealand freshwater fish, the upland bully. Although age and size at maturity varied among populations, they were not significantly related to either temperature regime or average parasite load. Trade-offs between egg size and clutch size were only apparent in one of the seven populations when populations were analyzed separately but became clear when all data were pooled. However, neither average population clutch size or egg size was related to the population's mean parasite load or the local temperature regime. Although the latter two parameters may influence other life history variables, such as the number of clutches produced per season and the partitioning of eggs among clutches, there was no evidence that they influenced life history strategies of the upland bully populations investigated here. Note 相似文献
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