Effects of a 100 metacercarial cyst inoculum on the host-parasite relationship of Echinostoma caproni and ICR mice.

The host-parasite relationship of a 100 metacercarial cyst inoculum of Echinostoma caproni in the ICR mouse was examined. Three groups of mice, A, B and C, each with six mice per group were used and all mice were necropsied at 14 days postinfection (p.i.), at which time the worms were ovigerous. Group A consisted of uninfected controls, whereas group B received 25 cysts per mouse (low dose) and group C received 100 cysts per mouse (high dose). There was no significant difference in food consumption between any of the groups from 0 to 14 days p.i. Control mice increased their body weight by 12%, group B by 5%, and group C showed a less than 1% increase in body weight between 0 and 14 days p.i. Echinostome parasitism caused a significant increase in the diameter of the mouse gut, with the gut of group C being more significantly dilated than that of either group A or B. The average worm recovery from group B was 20 worms per host, compared to 72 worms per host from group C. The mean wet and dry weights per worm from group B were 2.4 and 0.4 mg, respectively as compared to 0.6 and 0.2 mg respectively for group C. The mean number of uterine eggs per worm from group B was 180 compared to 125 for worms from group C. Worms from group C were more widely distributed in the small intestine than those from group B. Crowding effects associated with the high dose infection were clearly demonstrated in E. caproni from ICR mice.

An empirical assessment of rural community support networks for individuals with severe mental disorders.

The community support network has been well-established as a requirement for community treatment of individuals with severe mental disorders. This network generally consists of a multidisciplinary set of organizations that interrelate in some manner with individuals in the community. The question of coordination within this network has been much discussed; however little published research has empirically examined the types and extent of coordination among network organizations. In particular, little attention has been given to community support networks in rural communities. In each of seven rural counties, information was obtained on inter-actions among organizations in the community support network. These networks were analyzed to yield information on network density and centralization. Using measures of centrality, the most central organizations in each network were identified. Exchanges of information were the most common type of interaction among organizations in each network. Client referrals occurred less frequently, and sharing of resources was an even rarer phenomenon. Network analysis of community support networks provides an objective perspective on the structure of community support networks. An understanding of exchange among organizations within these networks is of value to administrators, clinicians, and planners interested in achieving greater effectiveness, as well as to patients, their families, and advocacy groups concerned with access and quality of care.

Corporatization and deprivatization of health services in Canada.

Canada's system of health services has been shaped by the forces and values in the Canadian political, cultural, social, and economic environment; these forces continue to place constraints on future changes. We distinguish between "corporatization" and "privatization", and the implications of each for improved efficiency of the system. Although the organization of health services is, in certain provinces, undergoing significant structural changes, there is evidence that rather than privatizing, the system may actually be continuing to experience what we have termed deprivatization, as the scope of government involvement expands to include a more comprehensive definition of health care. Trends in Canada differ considerably from those in the United States; universal health insurance has curbed the ability and desire of institutions to exclude members of some socioeconomic groups from receiving care. U.S.-based models, if applied to Canada, could lead to both higher costs and lower quality of care. Considerable efficiencies can be realized within Canada's current system.