scholarly journals Cloning of a Novel Babesia equi Gene Encoding a 158-Kilodalton Protein Useful for Serological Diagnosis

2005 ◽  
Vol 12 (2) ◽  
pp. 334-338 ◽  
Author(s):  
Haruyuki Hirata ◽  
Naoaki Yokoyama ◽  
Xuenan Xuan ◽  
Kozo Fujisaki ◽  
Naoyoshi Suzuki ◽  
...  
Keyword(s):  
Gene Product ◽  
Fluorescent Antibody ◽  
Horse Serum ◽  
Antibody Test ◽  
Immune Serum ◽  
Phage Library ◽  
Enzyme Linked Immunosorbent Assay ◽  
Infected Horse ◽  
Reading Frame ◽  
Babesia Equi

ABSTRACT In this study, we characterized a Babesia equi Be158 gene obtained by immunoscreening a B. equi cDNA expression phage library with B. equi-infected horse serum. The Be158 gene consists of an open reading frame of 3,510 nucleotides. The recombinant Be158 gene product was produced in Escherichia coli and used for the immunization of mice. In Western blot analysis, mouse immune serum against the Be158 gene product recognized 75- and 158-kDa proteins from the lysate of B. equi-infected erythrocytes. In an indirect fluorescent-antibody test with the mouse immune serum, the Be158 antigen appeared in the cytoplasm of Maltese cross-forming parasites (which consist of four merozoites) and was located mainly in the extraerythrocytic merozoite body. When the recombinant Be158 gene product was used in an enzyme-linked immunosorbent assay as a serological antigen, it was found to react to B. equi-infected horse sera, indicating that the Be158 gene product is useful as a serologically diagnostic antigen for B. equi infection.

scholarly journals Molecular Cloning of a Babesia caballi Gene Encoding the 134-Kilodalton Protein and Evaluation of Its Diagnostic Potential in an Enzyme-Linked Immunosorbent Assay

2004 ◽  
Vol 11 (1) ◽  
pp. 211-215 ◽  
Author(s):  
Yoh Tamaki ◽  
Haruyuki Hirata ◽  
Noriyuki Takabatake ◽  
Sabine Bork ◽  
Naoaki Yokoyama ◽  
...  
Keyword(s):  
Molecular Cloning ◽  
Immunosorbent Assay ◽  
Horse Serum ◽  
Enzyme Linked Immunosorbent Assay ◽  
Gene Encoding ◽  
Infected Horse ◽  
Babesia Caballi ◽  
Babesia Equi ◽  
Diagnostic Potential ◽  
Control Horse

ABSTRACT A Babesia caballi gene encoding the 134-kDa (BC134) protein was immunoscreened with B. caballi-infected horse serum. An enzyme-linked immunosorbent assay (ELISA) using recombinant BC134 protein could effectively differentiate B. caballi-infected horse sera from Babesia equi-infected or noninfected control horse sera. These results suggest that the recombinant BC134 protein is a potential diagnostic antigen in the detection of B. caballi infection.

scholarly journals Serodiagnosis of Babesia equi in horses submitted to exercise stress

2007 ◽  
Vol 27 (4) ◽  
pp. 179-183 ◽  
Author(s):  
Cristiane D. Baldani ◽  
Rosangela Z. Machado ◽  
Tânia F. Raso ◽  
Aramis A. Pinto
Keyword(s):  
High Speed ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Exercise Stress ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Babesia Equi ◽  
Combined Use ◽  
Before And After ◽  
Disease Free

A complement fixation test (CFT), performed in microtitre plates, based upon the use of crude antigenic preparation of Babesia equi was adapted for the detection of antibodies in serum of infected horses. The indirect fluorescent antibody test (IFAT) and enzyme-linked immunosorbent assay (ELISA) were also used for the immunodiagnosis of B. equi. Serum samples from 15 apparently healthy horses, previously conditioned to a high-speed equine treadmill, were taken before and after exercise. All the samples analyzed were positive for B. equi infection. There were no significant differences (P<0.01) between these 3 tests, or the condition of rest or stress. The combined use of CFT and IFAT or ELISA should be recommended in order to enable veterinary services to more efficiently prevent introduction of infected horses into disease-free areas.

scholarly journals The Search forIxodes damminiandBorrelia burgdorferiin Nova Scotia

1992 ◽  
Vol 3 (5) ◽  
pp. 224-230 ◽  
Author(s):  
Colin R Bell ◽  
Harold B Specht ◽  
B Ann Coombs
Keyword(s):  
Nova Scotia ◽  
Indirect Fluorescent Antibody Test ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Dermacentor Variabilis ◽  
Small Sample ◽  
Enzyme Linked Immunosorbent Assay ◽  
Indirect Fluorescent Antibody ◽  
Migrating Birds ◽  
Sera Samples

Twenty-fourIxodes damminiticks (23 adults and one nymph) have been recovered in Nova Scotia since 1984. There has not been a systematic search for larvae and none has been identified. The recovery of the nymph from a road-killed yellow throat bird,Geothypis trichas,in late May 1990 supports the contention that migrating birds are bringing deer ticks into the province every spring. In March and April 1991, four adult deer ticks were identified, suggesting that these ticks had overwintered. These deer tick specimens indicate that it is possible thatI damminiis becoming established in Nova Scotia, if it is not already established. There has been no evidence for the existence ofBorrelia burgdorferiin the province. The spirochete was not cultured from 650Dermacentor variabilisticks, nor were antibodies detected in a small sample of feral rodents using an indirect fluorescent antibody test. A survey of 137 dog sera samples, analyzed by enzyme-linked immunosorbent assay, also proved negative. There has been no confirmed indigenous case of Lyme disease in Nova Scotia to date.

scholarly journals Comparison of Enzyme-Linked Immunosorbent Assay, Indirect Fluorescent Antibody Test, and Direct Agglutination Test for Detecting Toxoplasma Gondii Antibodies in Naturally Aborted Ovine Fetuses

1989 ◽  
Vol 1 (2) ◽  
pp. 124-127 ◽  
Author(s):  
Sheryl L. Seefeldt ◽  
Clyde A. Kirkbride ◽  
Jitender P. Dubey
Keyword(s):  
Toxoplasma Gondii ◽  
Immunosorbent Assay ◽  
Indirect Fluorescent Antibody Test ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Agglutination Test ◽  
Enzyme Linked Immunosorbent Assay ◽  
Direct Agglutination Test ◽  
Indirect Fluorescent Antibody ◽  
Special Equipment

Results obtained in an enzyme-linked immunosorbent assay (ELISA), an indirect fluorescent antibody test (IFA), and a modified direct agglutination test (MAT) for Toxoplasma gondii antibodies from examination of fetal fluids from 377 aborted ovine fetuses were compared. Sixty-seven samples were positive by MAT (titers 1:16 to > 1:65,536), 58 were positive by ELISA, and 62 were positive by immunoglobulin G-IFA. The MAT was preferred because it required less time, labor, and special equipment. It was simple to run, could be done on serum from any species without modification, and it was more effective than the IFA for detecting toxoplasma antibodies in severely autolyzed fetuses. No advantage was found in determining immunoglobulin M antibodies in ovine fetal sera.

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