Abstract：
:The population structure of original Babesia bigemina isolates and reference strains with a defined phenotypic profile was assessed using 18S rRNA and rap-1c genes. Two reference strains, BbiS2P-c (virulent) and BbiS1A-c (low virulence), were biologically cloned in vitro. The virulence profile of the strains and clones was assessed in vivo. One fully virulent and one low-virulence clone were mixed in identical proportions to evaluate their growth efficiency in vitro. Each clone was differentiated by two microsatellites and the gene gp45. The 18S rRNA and rap-1c genes sequences from B. bigemina biological clones and their parental strains, multiplied exclusively in vivo or in vitro, were compared with strain JG-29. The virulence of clones derived from the BbiS2P-c strain was variable. Virulent clone Bbi9P1 grew more efficiently in vitro than did the low-virulence clone Bbi2A1. The haplotypes generated by the nucleotide polymorphism, localized in the V4 region of the 18S rRNA, allowed the identification of three genotypes. The rap-1c haplotypes allowed defining four genotypes. Parental and original strains were defined by multiple haplotypes identified in both genes. The rap-1c gene, analyzed by high-resolution melting (HRM), allowed discrimination between two genotypes according to their phenotype, and both were different from JG-29. B. bigemina biological clones made it possible to define the population structure of isolates and strains. The polymorphic regions of the 18S rRNA and rap-1c genes allowed the identification of different subpopulations within original B. bigemina isolates by the definition of several haplotypes and the differentiation of fully virulent from low virulence clones.
journal_name
Exp Parasitoljournal_title
Experimental parasitologyauthors
Thompson C,Baravalle ME,Valentini B,Mangold A,Torioni de Echaide S,Ruybal P,Farber M,Echaide Idoi
10.1016/j.exppara.2014.03.016subject
Has Abstractpub_date
2014-06-01 00:00:00pages
98-105eissn
0014-4894issn
1090-2449pii
S0014-4894(14)00059-9journal_volume
141pub_type
杂志文章abstract：:Though parasite cyclophilins are promising new drug targets, Eimeria tenella cyclophilins have not been characterized yet. Here, we describe an 89kDa cyclophilin, designated EtCYP89. It is expressed throughout the developmental cycle of E. tenella, both in the intracellular stages in chicken and in extracellular sporu...
journal_title：Experimental parasitology
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abstract：:Mice infected with Plasmodium berghei K173-parasitized erythrocytes develop severe hypothermia followed by death as a consequence of murine cerebral malaria early in the second week after infection. A single intraperitoneal injection of 10(5) Units of IFN-gamma given between Day 4 and Day 6 postinfection results in a ...
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journal_title：Experimental parasitology
pub_type： 杂志文章
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更新日期：1994-02-01 00:00:00
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pub_type： 杂志文章
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更新日期：1986-10-01 00:00:00
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journal_title：Experimental parasitology
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更新日期：2010-06-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2010.04.018
更新日期：2010-10-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.1993.1070
更新日期：1993-09-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2016.02.001
更新日期：2016-05-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2007.12.017
更新日期：2008-05-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2009.06.017
更新日期：2009-10-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/s0014-4894(85)80024-2
更新日期：1985-08-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2020.107862
更新日期：2020-02-19 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章,评审
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journal_title：Experimental parasitology
pub_type： 杂志文章
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2010.06.007
更新日期：2010-12-01 00:00:00
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pub_type： 杂志文章
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更新日期：2010-03-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
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更新日期：2011-02-01 00:00:00
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pub_type： 杂志文章
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更新日期：2006-01-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2013.03.020
更新日期：2013-06-01 00:00:00
abstract：:Chemoattraction studies were done with Schistosoma mansoni adults from mice. To test for attraction or repulsion, some worm pairs were separated mechanically and the individuals placed in polycarbonate chambers. Experiments were done at 37 C and chambers contained dialysis tube chimneys. In all cases, heterosexual att...
journal_title：Experimental parasitology
pub_type： 杂志文章
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更新日期：1983-10-01 00:00:00
abstract：:This article describes a sensitive, cheap, and easy method for assaying chemotaxic responses of Leishmania promastigotes. A gradient of the substance to be assayed was produced inside a series of commercially available capillary tubes submerged in a promastigote suspension. After an incubation period, the attractivene...
journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1006/expr.2000.4569
更新日期：2000-11-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
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更新日期：2007-03-01 00:00:00
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journal_title：Experimental parasitology
pub_type： 杂志文章
doi：10.1016/j.exppara.2016.09.012
更新日期：2016-11-01 00:00:00
abstract：:Three clones of Entamoeba histolytica (L-6, C93, C919) were isolated by mutagenesis with ethyl methanesulfonate from the axenic strain HM1:IMSS and were studied for adherence, cytolytic, and soluble galactose inhibitable lectin activity. Avirulent clones adhered to and killed fewer Chinese hamster ovary cells than HM1...
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pub_type： 杂志文章
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更新日期：1987-04-01 00:00:00
