A specific and sensitive PCR assay suitable for large-scale detection of toxigenic Pasteurella multocida in nasal and tonsilar swabs specimens of pigs

Autor: E.M. Kamp, T.M.M. Vermeulen, H.E.C.M. Buys, M.A. Smith, M.F. de Jong, F.H. Reek, G.C.A.M. Bokken
Jazyk: angličtina
Rok vydání: 1996
Předmět:
0301 basic medicine
DNA
Bacterial

food.ingredient
Pasteurella multocida
040301 veterinary sciences
Swine
030106 microbiology
Palatine Tonsil
Pasteurella Infections
Enzyme-Linked Immunosorbent Assay
medicine.disease_cause
Polymerase Chain Reaction
Sensitivity and Specificity
Microbiology
law.invention
0403 veterinary science
03 medical and health sciences
Microtiter plate
food
law
otorhinolaryngologic diseases
medicine
Life Science
Agar
Animals
Polymerase chain reaction
Swine Diseases
General Veterinary
biology
Toxin
Hybridization probe
04 agricultural and veterinary sciences
biology.organism_classification
Isolation (microbiology)
Molecular biology
Nasal Mucosa
ID-Lelystad
Instituut voor Dierhouderij en Diergezondheid

ID Lelystad
Institute for Animal Science and Health

Primer (molecular biology)
Zdroj: Journal of Veterinary Diagnostic Investigation, 8, 304-309
Journal of Veterinary Diagnostic Investigation 8 (1996)
ISSN: 1040-6387
Popis: A polymerase chain reaction (PCR) assay for the detection of toxigenic Pasteurella multocida in nasal and tonsillar swab specimens collected from pigs was developed. Target DNA was isolated with guanidine thiocyanate and diatomite, and 2 primer sets derived from sequences in the gene that encodes the dermonecrotic toxin-of P. multocida were used simultaneously. The method was adapted to microtiter plate format allowing large-scale use of the PCR assay. To identify false-negative test results caused by failure of amplification, a positive control template was constructed that was spiked to each DNA sample. The PCR assay was evaluated with clinical samples and compared with 2 routinely used methods for detection of toxigenic P. multocida: isolation from a selective agar and direct detection of the toxin in extracts of primary cultures by an enzyme-linked immunosorbent assay (ELISA). The sensitivity of the PCR assay was tested with 346 nasal and tonsillar swabs specimens collected from pigs of 9 herds known to be infected with toxigenic P. multocida. Toxigenic P. multocida was isolated from 22 specimens, only 28 specimens tested positive in ELISA, but 40 tested positive in the PCR assay; thus the PCR assay is the most sensitive of the 3 methods. The specificity of the PCR assay was tested with 372 swab specimens collected from pigs of 6 herds certificated to be free from toxigenic P. multocida. Toxigenic P. multocida was not isolated from any of these specimens, all tested negative in ELISA, and 370 tested negative in PCR. The 2 positive specimens came from 2 pigs of 1 litter and tested only weakly positive in the PCR assay. From these results, it was concluded that the PCR assay is not only highly sensitive but also highly specific.
Databáze: OpenAIRE
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