ArticleInfection and immunity1990
Immune and nonimmune regulation of the population of Trypanosoma musculi in infected host mice.
Article in Infection and immunity, 1990. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
A clear understanding of the population dynamics of trypanosome infections is lacking. In the case of murine Trypanosoma musculi infections, there are no answers to questions concerning (i) the nature of the prolonged plateau phase during which the number of parasites present in the host remains nearly constant (is it a static or dynamic steady state?); (ii) the origin of new parasites, if the plateau is a dynamic steady state, given the relatively early disappearance of generative forms from the bloodstream; and (iii) the role, if any, of a putative ablastin (reproduction-restricting antibody) in regulating the population dynamics of T. musculi infections. We describe here the results of studies of the number and distribution of mature and reproductive forms (RF) in the blood and peritoneal space of both immunocompetent and cyclophosphamide-treated mice throughout the course of infection. While the RF disappeared from the blood within a few days after parasite inoculation, a high fraction (20 to 30%) of the parasites in the peritoneal space were RF throughout the course of infection and, thus, represented a source of new parasites. If an ablastin is responsible for inhibiting RF in the blood, it appeared to have no effect on RF in the peritoneal space. The results of this investigation support the conclusion that the control of the dynamics of T. musculi infections is largely nonimmunological (until cure of the infection) and probably is exercised by the supply of nutrients and reproduction-inhibiting (nonimmunological) and maturation-promoting factors that affect the generative fraction of the population.
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