Epidemiological study in a bovine herd with intermediate prevalence of brucellosis, vaccinated with RB51 and rfbK rough mutant strains of Brucella abortus.
With the objective of analyzing the behavior of two Brucella abortus rough vaccines, a brucellosis infected herd in which the prevalence of the disease was 8.7% was worked with. The animals were randomly distributed in three groups: Group vaccinated with RB51 had 392 cows; Group vaccinated with rfbK...
| Publicado en: | Veterinaria México Vol. 38; no. 2; pp. 197 - 205 |
|---|---|
| Autores principales: | , , , , |
| Formato: | Artículo |
| Publicado: |
Facultad de Medicina Veterinaria y Zootecnia UNAM
abr-jun2007
|
| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=lth&AN=25383164&site=ehost-live header: @attributes: shortDbName: lth uiTerm: 25383164 longDbName: MedicLatina uiTag: AN controlInfo: bkinfo: jinfo: jid: 03015092 7LD jtl: Veterinaria México issn: 03015092 maglogo: N pubinfo: dt: abr-jun2007 vid: 38 iid: 2 pid: 20869 pub: Facultad de Medicina Veterinaria y Zootecnia UNAM artinfo: ui: 25383164 ppf: 197 ppct: 8 formats: fmt: @attributes: type: P size: 298KB tig: atl: Epidemiological study in a bovine herd with intermediate prevalence of brucellosis, vaccinated with RB51 and rfbK rough mutant strains of Brucella abortus. aug: au: Cantú, Antonio Díaz Aparicio, Efrén Hernández Andrade, Laura Adams, Garry L. Suárez Güemes, Francisco affil: Centro de Investigaciones Región Noroeste, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Aldama, Tamaulipas, México Centro Nacional de Investigaciones Microbiológicas, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Carretera México-Toluca, Km 15.5, Cuajimalpa, 05110, México, D. F. Department of Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Tx, USA Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, 04510, México, D. F. su: Brucellosis in animals Brucellosis Brucella abortus Cattle infections Brucellosis vaccines Gram-negative bacteria Vaccination Cattle sug: subj: Brucellosis in animals Brucellosis Brucella abortus Cattle infections Brucellosis vaccines Gram-negative bacteria Vaccination Cattle keyword: BRUCELLA ABORTUS BRUCELLOSIS CATTLE RB51 rfbK ab: With the objective of analyzing the behavior of two Brucella abortus rough vaccines, a brucellosis infected herd in which the prevalence of the disease was 8.7% was worked with. The animals were randomly distributed in three groups: Group vaccinated with RB51 had 392 cows; Group vaccinated with rfbK had 237 cows, and non-vaccinated Group had 35 cows. Bacteriological and serological studies were performed in those animals for a period of one year and an experimental longitudinal comparative and prospective epidemiological study was carried out. There were abortions and stillborn calves in the three groups, and Brucella abortus biotype 1 was isolated from the milk of two cows in the control group. Using the criteria that animals vaccinated with rough strains, positive to card test, were infected, the rate of monthly incidence for the vaccinated cows with RB51 was 1.65 per each 100. For the cows that were immunized with rfbK this value was of 2.7, with a significant difference between groups (P < 0.001). If the results are analyzed using the criterion by which, animals that present equal or higher titers to 1:100 remain as reactors, and those that have titers of 1:50 or less present a transitory answer becoming negatives, the rate of monthly incidence for the cows vaccinated with RB51 was of 0.21 per each 100 immunized cows. For the cows that were immunized with rfbK this value was of 0.35, not showing a significant difference between groups (P > 0.01). It is concluded that in vaccinated herds with intermediate prevalence of brucellosis, the presence of post-vaccinated reactors is due to a secondary type response to contact with B. abortus field strains, which does not necessarily indicate infection and can be discerned by using the test of Rivanol; under this criterion, both vaccines confer good protection. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y custom: Copyright of Veterinaria México is the property of Facultad de Medicina Veterinaria y Zootecnia UNAM and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. item: Veterinaria México holder: Facultad de Medicina Veterinaria y Zootecnia UNAM dt: @attributes: year: 2007 holdings: @attributes: islocal: N |
|---|