دورية أكاديمية
Mycoplasma hyopneumoniae infection dynamics in naïve replacement gilts introduced to positive farms.
| العنوان: | Mycoplasma hyopneumoniae infection dynamics in naïve replacement gilts introduced to positive farms. |
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| المؤلفون: | Brandalise L; College of Veterinary Medicine, Catarinense Federal Institute, Concórdia, SC, Brazil; Agroceres PIC, Rio Claro, SP, Brazil., Takeuti KL; College of Veterinary Medicine, Feevale University, Campo Bom, RS, Brazil., Kich JD; EMBRAPA Swine and Poultry, Concórdia, SC, Brazil., Clavijo MJ; Veterinary Diagnostic and Population Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, USA; Pig Improvement Company, PIC®, Hendersonville, TN, USA., Simão GMR; Agroceres PIC, Rio Claro, SP, Brazil., Sato JPH; Agroceres PIC, Rio Claro, SP, Brazil., Coldebella A; EMBRAPA Swine and Poultry, Concórdia, SC, Brazil., Pigozzo R; Agroceres PIC, Rio Claro, SP, Brazil., Nagae R; Seara Foods, Itajaí, SC, Brazil., Dezen D; College of Veterinary Medicine, Catarinense Federal Institute, Concórdia, SC, Brazil. Electronic address: diogenes.dezen@ifc.edu.br. |
| المصدر: | Veterinary microbiology [Vet Microbiol] 2023 Nov; Vol. 286, pp. 109886. Date of Electronic Publication: 2023 Oct 04. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Scientific Pub. Co Country of Publication: Netherlands NLM ID: 7705469 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-2542 (Electronic) Linking ISSN: 03781135 NLM ISO Abbreviation: Vet Microbiol Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam, Elsevier Scientific Pub. Co. |
| مواضيع طبية MeSH: | Pneumonia of Swine, Mycoplasmal*/epidemiology , Pneumonia of Swine, Mycoplasmal*/microbiology , Mycoplasma hyopneumoniae*/genetics , Swine Diseases*, Swine ; Animals ; Female ; Farms ; Sus scrofa ; Polymerase Chain Reaction/veterinary |
| مستخلص: | This study was designed to characterize the dynamics of infection of Mycoplasma hyopneumoniae in naïve replacement gilts after introduction to positive systems. Ninety-eight naïve gilts were monitored in three positive commercial farms (A, B, and C). The näive gilts were housed for 21 days in pens adjacently located to older gilt cohorts (named seeders), which have been naturally exposed to the positive farms. The infection dynamics was evaluated by PCR and ELISA, from laryngeal swabs and serum samples, respectively. Samples were collected at 150 (arrival), 165, 180, 210, 240, 270, 300 days of age (doa), and pre-farrowing. Infection occurred rapidly on farms A and B, taking 25.2 and 23.9 days for 95% of gilts to be PCR positive, respectively. There was no influence on the number of seeders at the time of exposure, but their absence (farm C) could explain the extended period it took for gilts to get infected (69.4 days). On average, it took 162.2 days after the first PCR detection for 85% of gilts to stop shedding the bacterium. The serology results were consistent with the herd infection curve. At pre-farrowing, 100% of gilts seroconverted and 36.7% remained PCR positive. A total of 1.33% of piglets were positive at weaning. Fifteen variants were detected among the three farms by MLVA. The acclimation protocol was efficient and easy to perform, and the presence of seeders was likely critical for early acclimation for M. hyopneumoniae. Competing Interests: Declaration of Competing Interest The authors declare that they have no conflict of interest. (Copyright © 2023 Elsevier B.V. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Infection dynamics; Laryngeal swabs; PCR; Serology; Transmission |
| تواريخ الأحداث: | Date Created: 20231020 Date Completed: 20231106 Latest Revision: 20231106 |
| رمز التحديث: | 20231106 |
| DOI: | 10.1016/j.vetmic.2023.109886 |
| PMID: | 37862723 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1873-2542 |
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| DOI: | 10.1016/j.vetmic.2023.109886 |