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PubMedDate not supplied

Toxoplasmosis prevalence parasitologically evaluated in meat animals.

The frequency of Toxoplasma gondii infection in the meat provided by two abattoirs, as well as the pathogenicity of the isolated strains were studied. The parasite carriage was investigated on 299 pools of diaphragmatic muscle (1 pool = 10 animals) from 740 swine, 910 cattle and 1340 sheep: the methods used were bioassays on mice and the precocious identification of the tachyzoites in the peritoneal exudate and after 30 days the cerebral cysts. There were obtained 27 positive results (9.01%), in the examined pools of meat, without significant differences as concerns the frequency in relation to the animal species. Out of these strains two were virulent for mice and rabbits.

Abattoirs↗
PubMedDate not supplied

[Progress of ecological parasitology--parasite communities].

Many of the major development in the field of parasite community ecology have been due to a switch in focus from a search for pattern to investigation of the processes that produce those patterns. This switch has been accompanied by a recognition that different processes operate at the scale of the individual host (processes determining host specificity and attributes of the niches of the parasites), within the unit of habitat (processes determining population dynamics, exchange of parasites, and transmission), and among units of habitat (processes determining colonization, extinction, or local speciation of parasites). Further developments are likely to depend upon the coordinated use of models, experimental approaches, and field observations aimed at clarifying the conditions under which the processes at each scale became particularly important.

Animals↗