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García AA, Torreglosa JT, Marín DD, Bernal MKM, Rolim Filho ST, Pereira WLA. Leptospirosis, bovine viral diarrhea and infectious bovine rhinotracheitis: prevalence in Colombian cattle and buffaloes. ACTA SCIENTIARUM: ANIMAL SCIENCES 2022. [DOI: 10.4025/actascianimsci.v44i1.54875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
One of the limiting factors of productive efficiency in cattle and buffalo herds is related to the high prevalence of infectious diseases which affect reproduction. The aim of this study was to determine the prevalence of anti-Leptospira antibodies for bovine viral diarrhea virus (BVDV) and bovine herpesvirus type 1 (BoHV-1) in bovine and buffalo herds in Colombia. Blood serum samples were collected from 1100 buffaloes and 1000 cattle. The ELISA technique was used to detect antibodies against BVDV and BoHV-1, and the microscopic agglutination technique to detect anti-Leptospira antibodies. The prevalence of anti-Leptospira antibodies and of BVDV and BoHV-1 in bovine samples was observed in 16, 39.7, and 65% of animals, respectively, while the positivity in samples for the same antibodies in buffalos was detected in 18.7, 27.5 and 51.5%, respectively. Exposure of cattle and buffaloes to BoHV-1 was positively associated with age, higher prevalence rates were observed in older ages. Seropositivity of cattle for BVDV and BoHV-1 was higher in male animals. Activities such as embryo transfer, milking, and needle reuses, as well as the presence of cats and rodents are factors which favor positivity of the herd for BVDV and BoHV-1.
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Doysabas KCC, Oba M, Ishibashi T, Shibata H, Takemae H, Shimoda H, Tarigan R, Mizutani T, Iida A, Hondo E. ATeam technology for detecting early signs of viral cytopathic effect. J Vet Med Sci 2020; 82:387-393. [PMID: 32051347 PMCID: PMC7118481 DOI: 10.1292/jvms.20-0021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Adenosine 5’-triphosphate (ATP), the major energy currency of the cell, is involved in many cellular processes, including the viral life cycle, and can be used as an indicator of early
signs of cytopathic effect (CPE). In this study, we demonstrated that CPE can be analyzed using an FRET-based ATP probe named ATP indicator based on Epsilon subunit for Analytical
Measurements (ATeam). The results revealed that as early as 3 hr, the virus infected cells showed a significantly different Venus/cyan fluorescent protein (CFP) ratio compared to the
mock-infected cells. The ATeam technology is therefore useful to determine the early signs of ATP-based CPE as early as 3 hr without morphology-based CPE by light microscopy, and enables
high throughput determination of the presence of microorganisms in neglected samples stored in laboratories.
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Affiliation(s)
- Karla Cristine C Doysabas
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Mami Oba
- Laboratory of Veterinary Microbiology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Sawai, Fuchu, Tokyo 183-8509, Japan
| | - Tomoki Ishibashi
- Laboratory of Insect Ecology, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8224, Japan
| | - Hideki Shibata
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Hitoshi Takemae
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Hiroshi Shimoda
- Laboratory of Veterinary Microbiology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi-shi, Yamaguchi 753-8511, Japan
| | - Ronald Tarigan
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Tetsuya Mizutani
- Laboratory of Veterinary Microbiology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Sawai, Fuchu, Tokyo 183-8509, Japan
| | - Atsuo Iida
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Eiichi Hondo
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
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Pansri P, Katholm J, Krogh KM, Aagaard AK, Schmidt LMB, Kudirkiene E, Larsen LE, Olsen JE. Evaluation of novel multiplex qPCR assays for diagnosis of pathogens associated with the bovine respiratory disease complex. Vet J 2020; 256:105425. [PMID: 32113583 PMCID: PMC7110767 DOI: 10.1016/j.tvjl.2020.105425] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 01/10/2020] [Accepted: 01/10/2020] [Indexed: 11/17/2022]
Abstract
Bovine respiratory disease complex is the most common disease requiring the use of antimicrobials in industrial calf production worldwide. Pathogenic bacteria (Mannheimia haemolytica (Mh), Pasteurella multocida (Pm), Histophilus somni (Hs), and Mycoplasma bovis) and a range of viruses (bovine respiratory syncytial virus, bovine coronavirus, bovine parainfluenza virus type 3, bovine viral diarrhea virus and bovine herpesvirus type 1) are associated with this complex. As most of these pathogens can be present in healthy and diseased calves, simple detection of their presence in diseased calves carries low predictive value. In other multi-agent diseases of livestock, quantification of pathogens has added substantially to the predictive value of microbiological diagnosis. The aim of this study was to evaluate the ability of two recently developed quantitative PCR (qPCR) kits (Pneumo4B and Pneumo4V) to detect and quantify these bacterial and viral pathogens, respectively. Test efficiencies of the qPCR assays, based on nucleic acid dilution series of target bacteria and viruses, were 93-106% and 91-104%, respectively, with assay detection limits of 10-50 copies of nucleic acids. All 44 strains of target bacteria were correctly identified, with no false positive reactions in 135strains of non-target bacterial species. Based on standard curves of log10 CFU versus cycle threshold (Ct) values, quantification was possible over a 5-log range of bacteria. In 92 tracheal aspirate samples, the kappa values for agreement between Pneumo4B and bacterial culture were 0.64-0.84 for Mh, Pm and Hs. In an additional 84 tracheal aspirates, agreement between Pneumo4B or Pneumo 4V and certified diagnostic qPCR assays was moderate (0.57) for M. bovis and high (0.71-0.90) for viral pathogens. Thus Pneumo4 kits specifically detected and quantified the relevant pathogens.
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Affiliation(s)
- P Pansri
- DNA Diagnostic, Risskov, Denmark
| | | | - K M Krogh
- LVK Veterinary Cattle Practice, Hobro, Denmark
| | - A K Aagaard
- Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen Denmark
| | - L M B Schmidt
- Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen Denmark
| | - E Kudirkiene
- Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen Denmark
| | - L E Larsen
- National Veterinary Laboratory, Technical University of Denmark, Lyngby, Denmark
| | - J E Olsen
- Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen Denmark.
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