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4 results for “Babesia microti”
Figs 3A–F in Rat spleen in the course of Babesia submicroscopic studies microti invasion: histological and
Figs 3A–F. Splenic white pulp of rats with 21-day (A, arrows show empty spaces in nuclear membrane) and 6-month B. microti invasion (B). Swellings in rat spleen with 21-day B. microti invasion (C). Invaded erythrocytes in sinus blood vessels in rat spleen with 21-day parasitemia (D). Vacuole in macrophage of the rat spleen with 6-month B. microti invasion (E). Macrophage in red pulp of the rat spleen with 6-month B. microti invasion (F). Preparations imaging with the use of transmission electron microscopy (TEM). Abbreviations: Bm – Babesia microti merozoites, Er – erythrocytes, Hem – hemosiderin, Mf – macrophage containing digested fragments of erythrocytes and heterophagical vacuoles – HV, Tr – thrombocytes, V – vacuole containing fibrous remnants of cytoskeleton.
Figs 1A–E in Rat spleen in the course of Babesia submicroscopic studies microti invasion: histological and
Figs 1A–E. The peripheral blood smear of control rats (A) rats with 21-day B. microti invasion (B) and rats with 6-month B. microti invasion (C) (black arrows – B. microti merozoites). Preparations were stained with MGG method. The surface observations of erythrocytes invaded with B. microti showed the presence of characteristic, elongated structures under the cell membrane (D, E). Imaging in AFM. Abbreviation: Lf – lymphocyte.
Ecological interactions driving population dynamics of two tick-borne pathogens, Borrelia burgdorferi and Babesia microti
<p><em>Borrelia</em> <em>burgdorferi</em> (<em>Bb</em>) and <em>Babesia</em> <em>microti</em> (<em>Bm</em>) are vector-borne zoonotic pathogens commonly found co-circulating in <em>Ixodes</em> <em>scapularis</em> and <em>Peromyscus</em> <em>leucopus</em> populations. The restricted distribution and lower prevalence of <em>Bm</em> has been historically attributed to lower host-to-tick transmission efficiency and limited host ranges. We hypothesized that prevalence patterns are driven by coinfection dynamics and vertical transmission. We use a multi-year, multiple-location, longitudinal dataset with mathematical modelling to elucidate coinfection dynamics between <em>Bb</em> and <em>Bm</em> in natural populations of <em>P. leucopus</em>, the most competent reservoir host for both pathogens in the eastern USA. Our analysis indicates that, in the absence of vertical transmission, <em>Bb</em> is viable at lower tick numbers than <em>Bm</em>. However, with vertical transmission, Bm is viable at lower tick numbers than <em>Bb</em>. Vertical transmission has a particularly strong effect on <em>Bm</em> prevalence early in the active season while coinfection has an increasing role during the nymphal peak. Our analyses indicate that coinfection processes, such as facilitation of <em>Bm</em> infection by <em>Bb</em>, have relatively little influence on the persistence of either parasite. We suggest future work examines the sensitivity of <em>Bm</em> vertical transmission and other key processes to local environmental conditions to inform surveillance and control of tick-borne pathogens.</p>
Ecological interactions driving population dynamics of two tick-borne pathogens, Borrelia burgdorferi and Babesia microti
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