Experimental infection of pigs porcine epidemic diarrhea virus
AbstractThere were infected neonatal piglets in the first days of their lives PED virus suspension derived from pigs previously PED patients. Diagnosis for PED in piglets donor virus PED was inserted complex method for clinical and epizootic performance and confirmed the identification PEDV by PCR-RT using the test system «EZ-RED/TGE/PDCoV MPX 1.0 Real time RT-PCR» company Tetracore (USA) Thermocyclers CFX 96 Real-Time System company BIO RAD (USA). Homogenate small intestine of pigs PEDV donor, prepared in a blender for PCR in a thick band of 18 animal carcasses, frozen at -18 °C without cryopreservation and kept 359 days. Before infecting pigs and strip defrost by RT-PCR identified the concentration of the virus genome equivalents (GE) without establishing viable virions quantitative pathogen. For Sample 20 selected analog neonatal piglets, divided them into 3 experimental groups (group 1 – 5 piglets, group 2 – 5 piglets and group 3 – 7 piglets) and one control (3 piglets). Research pigs infected per os virus-containing suspension with a concentration PEDV 1.03×106 GE/cm3. The dose for infection first group was 6 cm3 (6.18×106 GE/cm3), for the second – 5 cm3 (5,15 × 106 GE/cm3), for the third – 4 cm3 (4.12 GE×106/cm3) homogenate. The fourth group – control (not infected). All the pigs were in identical conditions that fully meet the physiological needs of the body. Of the 17 infected pigs only 2 was infected PEDV. PED was confirmed by laboratory methods. In bacteriological examination of internal organs of pigs that came out of a research experiment and control group were diagnosed colibacteriosis. In the control group was isolated from heart and intestinal non-pathogenic for white mice E. coli. From pigs 1 and 2 research groups has been allocated to white mice nonpathogenic E. coli, is set colibacteriosis; 2 experimental group found in one pig hemolytic E. coli; 3 experimental group from the internal organs of pigs in conjunction with non-pathogenic for mice intestinal former cane isolated Klesiella spp., is diagnosed with mixed infection (E. coli, Klesiella spp.). From the intestine of experimental and control pigs do not identified beneficial microflora – aerococcus, lactobacteria, bifidobacteria and cultured putrefactive anaerobic spore facultative and non spore microflora.
Dastjerdi, A., Carr, J., Richard, J. (2015). Porcine Epidemic Diarrehea Virus among Farmed Pigs, Ukraine. Emerging Infectious Disease. 21(12), 2235–2237. www.cdc.gov/eid.
Song, D., Park, B. (2012). Porcine Epidemic Diarrhea Virus, a comprehensive review of molecular epidemiology, diagnosis and vaccines. Virus Genes. 44, 167–175
Stevenson, G.W., Hoang, H., Schwartz, K.J. (2013). Emergence of Porcine epidemic diarrhea virus in the United States: clinical signs, lesions and viral genomic sequences. J. Vet Diagn. Invest. 25, 649–654. http://dx.doi. org/10.1177/1040638713501675
Sait Mizhnarodnoho Epizootychnoho Biuro. Rezhym dostupu: http://www.oie.int/en (in Ukrainian).
Abstract views: 154 PDF Downloads: 129
This work is licensed under a Creative Commons Attribution 4.0 International License.