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Development of high-performance liquid chromatography methods for the anticoccidials: toltrazuril and diclazuril
2017
Jeong, K.H., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Jeong, M., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Park, H.C., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Hossain, M.A., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kim, D., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Lee, K.J., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kang, J.W., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea
This study was undertaken to develop new analytical methods for assessment of anticoccidials. Highperformance liquid chromatography (HPLC) was found to be a fast, reliable, and practical method. The anticoccidials used in this experiment were toltrazuril and diclazuril, and the analysis factors were specificity, linearity, accuracy, repeatability, and intermediate precision. The linearity of each anticoccidial was better than 0.99, and the accuracies were 99.5% and 99.1% with relative SD of 0.5 and 0.4, respectively. To assess whether the developed HPLC method could be effectively applied, toltrazuril and diclazuril post-market veterinary products (five products) that are currently sold were tested. The results revealed no non-compliant items and the method was applied successfully. Therefore, the newly developed HPLC method for anticoccidial assessment described in this study may be useful as a reference method in the Korean Standards of Veterinary Pharmaceuticals for the analysis of toltrazuril and diclazuril.
Afficher plus [+] Moins [-]Evaluation of the correlation between gross lung score and microscopic diagnosis for swine pneumonia in Korean slaughterhouses
2017
Lee, H.S., Seoul National University, Seoul, Republic of Korea | Kim, M.C., Seoul National University, Seoul, Republic of Korea | Kim, N.Y., Seoul National University, Seoul, Republic of Korea | Hwang, S.H., Seoul National University, Seoul, Republic of Korea | Ji, S., Seoul National University, Seoul, Republic of Korea | Park, Y.K., Seoul National University, Seoul, Republic of Korea | Park, Y.H., Seoul National University, Seoul, Republic of Korea | Kim, Y., Seoul National University, Seoul, Republic of Korea
To reduce swine production costs, a slaughter check system has been developed in countries with an advanced swine industry. Evaluation of lung lesions in carcasses is a critical part of the slaughter check system. This study was performed to collect background information for use in developing a slaughter check system in Korea. Lung tissues and their gross images were collected from slaughterhouses in Gyeonggi-do, Korea. Scoring of the gross lung lesions was performed on the lung images. Histopathologic examination was conducted to classify the pulmonary lesions as bronchopneumonia or interstitial pneumonia. Scores of the gross lung lesions were significantly different between bronchopneumonia and interstitial pneumonia groups (p less than 0.001). A 90% confidence interval of gross lung lesion scores was established for the bronchopneumonia group, and the lesion scoring had a sensitivity of 100% and specificity of 77.3%. The gross lung lesion scoring test was subjected to a diagnostic distinction evaluation by examining the receiver operating characteristic curve and was appraised as having good discrimination for bronchopneumonia. Establishment of a gross lung lesion scoring test for the diagnosis of bronchopneumonia could be valuable as a screening test of macroscopic bronchopneumonia in swine slaughter check system.
Afficher plus [+] Moins [-]Conservation of matrix protein genes in rabies viruses circulating in South Korea since 1999
2017
Lee, Y.A., Food and Rural Affair, Gimcheon, Republic of Korea | Kim, H.H., Food and Rural Affair, Gimcheon, Republic of Korea | Yang, D.K., Food and Rural Affair, Gimcheon, Republic of Korea | Cho, I.S., Food and Rural Affair, Gimcheon, Republic of Korea
Rabies virus (RABV) causes a neurological disease in warm-blooded animals that is nearly always fatal. In this study, we analyzed the matrix (M) genes in 10 Korean street RABV strains isolated from two Provinces during 2011-2013. The M genes in these 10 Korean strains were highly conserved during 1999-2013. Phylogenetic analysis revealed they were closely related to the M genes of RABVs isolated in northeastern China. Specific amino acid substitutions were identified in the KRVB1206, KRVF1301, and BV9901PJ strains. However, functional domains, including those involved in virus production and pathogenicity, were conserved in all 10 strains.
Afficher plus [+] Moins [-]Amyloidosis in a Whooper swan (Cygnus cygnus)
2017
Woo, S.H., Seoul National University, Seoul, Republic of Korea | Kim, Y.A., Samsung Construction and Trading, Yongin, Republic of Korea | Kwon, S.W., Samsung Construction and Trading, Yongin, Republic of Korea | Kim, Y.B., Samsung Construction and Trading, Yongin, Republic of Korea | Youn, S.H., Samsung Construction and Trading, Yongin, Republic of Korea | Shin, K.Y., Samsung Construction and Trading, Yongin, Republic of Korea | Jung, E., Samsung Construction and Trading, Yongin, Republic of Korea | Go, D.M., Seoul National University, Seoul, Republic of Korea | Kim, D.Y., Seoul National University, Seoul, Republic of Korea
Two Whooper swan (Cygnus cygnus) died after suffering from pododermatitis, lethargy, and ataxia; necropsy was performed. Grossly, the liver was swollen and firm. The kidney and spleen were also enlarged and a pale tan color. On histopathologic examination with Congo red staining, amyloidosis was noted in liver, spleen, and kidney. In addition, marked osseous metaplasia was present in the liver. Based on these results, systemic amyloidosis involving liver, spleen, and kidney with osseous metaplasia in the liver was diagnosed. Study results indicate that an inflammatory reaction associated with pododermatitis had a role in the amyloidosis in this particular case.
Afficher plus [+] Moins [-]Prevalence and renal pathology of pathogenic Leptospira spp. in wildlife in Abeokuta, Ogun State, Nigeria Texte intégral
2017
Ajayi, Olusola L.(Federal University of Agriculture Department of Veterinary Pathology) | Antia, Richard E.(University of Ibadan Department of Veterinary Pathology) | Ojo, Olufemi E.(Federal University of Agriculture Department of Veterinary Microbiology and Parasitology) | Awoyomi, Olajoju J.(Federal University of Agriculture Department of Veterinary Public health and Reproduction) | Oyinlola, Latifa A.(Federal University of Agriculture Department of Food Science and Technology) | Ojebiyi, Oluwabusola G.(Federal University of Agriculture Department of Veterinary Pathology)
There is paucity of information on the prevalence of leptospirosis in wildlife in Nigeria. This study investigated the prevalence and renal pathology of leptospirosis in wild animals in Southwest Nigeria. One hundred and five kidney samples were examined from 10 different wildlife species (antelope) greater cane rat (GCR), hare, African giant rat (AGR), tree hyrax, civet cat, monitor lizard, python, bushbuck and partridge) using a combination of Ellinghausen McCullough Johnson Harris (EMJH) medium, microscopic agglutination test (MAT), Warthin-Starry silver stain (WSss) and immunohistochemistry. Chi-square test was used with confidence level set at 0.05 to ascertain associations between positive cases and sex and species. Eighty-two (78.1%) samples were culturally positive, while 67.7% (63/93), 57.0% (16/28) and 66.7% (8/12) were WSss, MAT and immunohistochemically positive, respectively. Interstitial nephritis (41.0%) and tubular nephrosis (81.0%) were the most prominent histopathological changes. Pathogenic Leptospira organisms were highest in GCR (32.1%) and antelope (14.3%). Serovars hardjo (11.54%), bratislava (3.9%), canicola (3.9%), icterohaemorrhagiae (15.4%), pomona (7.14%) gripptotyphosa (19.2%) and undetermined isolates were also detected in other animals. The result showed high prevalence of Leptospira infection in the wild and the possibility of domestic animals and humans contracting the disease. This study is the first documentation of evidence of pathogenic Leptospira species in wildlife in Nigeria.
Afficher plus [+] Moins [-]Epidemiological studies based on multi-locus sequence typing genotype of methicillin susceptible Staphylococcus aureus isolated from camel's milk Texte intégral
2017
Ali, Alsagher O.(South Valley University Animal Medicine Department Division of infectious Diseases) | Mahmoud, Hassan Y.A.H.(South Valley University Animal Medicine Department Division of infectious Diseases)
One hundred milk samples were collected from camel's milk for the isolation of Staphylococcus aureus. Thirty-one isolates were S. aureus, 45 were other forms of staphylococci and 24 represented other bacteria. Five isolates from S. aureus were methicillin resistant S. aureus (MRSA) and 26 samples were methicillin susceptible S. aureus (MSSA). The whole genome sequence of S. aureus was annotated and visualised by rapid annotation using subsystem technology (RAST) which is a fully-automated service for annotating complete or nearly complete bacterial genomes. Four isolates from MSSA strains were subjected to multi-locus sequence typing (MLST). Three multi-locus sequences types or sequence types (MLST/ST) were found, namely ST15, ST1153 and ST130. The phylogenetic analysis of the concatenated sequences of the seven genes forming the MLST profile of S. aureus classification revealed a high degree of similarity and close relationship between the ST15 and ST1153 while the third ST (ST130) was located in a different cluster.
Afficher plus [+] Moins [-]A retrospective study of anthrax on the Ghaap Plateau, Northern Cape province of South Africa, with special reference to the 2007-2008 outbreaks Texte intégral
2017
Hassim, Ayesha(University of Pretoria Department of Veterinary Tropical Diseases) | Dekker, Edgar H.(South Africa Department of Agriculture, Forestry and Fisheries) | Byaruhanga, Charles(University of Pretoria Department of Veterinary Tropical Diseases) | Reardon, Tommy(South Africa Department of Agriculture, Forestry and Fisheries) | van Heerden, Henriette(University of Pretoria Department of Veterinary Tropical Diseases)
Anthrax is a zoonotic disease caused by the gram-positive, endospore-forming and soil-borne bacterium Bacillus anthracis. When in spore form, the organism can survive in dormancy in the environment for decades. It is a controlled disease of livestock and wild ungulates in South Africa. In South Africa, the two enzootic regions are the Kruger National Park and the Ghaap Plateau in the Northern Cape province. Farms on the Plateau span thousands of hectares comprising of wildlife - livestock mixed use farming. In 2007-2008, anthrax outbreaks in the province led to government officials intervening to aid farmers with control measures aimed at preventing further losses. Because of the ability of the organism to persist in the environment for prolonged periods, an environmental risk or isolation survey was carried out in 2012 to determine the efficacy of control measures employed during the 2007-2008, anthrax outbreaks. No B. anthracis could be isolated from the old carcass sites, even when bone fragments from the carcasses were still clearly evident. This is an indication that the control measures and protocols were apparently successful in stemming the continuity of spore deposits at previously positive carcass sites.
Afficher plus [+] Moins [-]Assessment of agreement among diplomates of the American College of Veterinary Anesthesia and Analgesia for scoring the recovery of horses from anesthesia by use of subjective grading scales and development of a system for evaluation of the recovery of horses from anesthesia by use of accelerometry Texte intégral
2017
Clark-Price, Stuart C. | Lascola, Kara M. | Carter, Jennifer E. | Da Cunha, Anderson F. | Donaldson, Lydia L. | Doherty, Thomas J. | Martin-Flores, Manuel | Hofmeister, Erik H. | Keating, Stephanie C. J. | Mama, Khursheed R. | Mason, Diane E. | Posner, Lysa P. | Sano, Hiroki | Seddighi, Reza | Shih, Andre C. | Weil, Ann B. | Schaeffer, David J.
OBJECTIVE To evaluate agreement among diplomates of the American College of Veterinary Anesthesia and Analgesia for scores determined by use of a simple descriptive scale (SDS) or a composite grading scale (CGS) for quality of recovery of horses from anesthesia and to investigate use of 3-axis accelerometry (3AA) for objective evaluation of recovery. ANIMALS 12 healthy adult horses. PROCEDURES Horses were fitted with a 3AA device and then were anesthetized. Eight diplomates evaluated recovery by use of an SDS, and 7 other diplomates evaluated recovery by use of a CGS. Agreement was tested with κ and AC1 statistics for the SDS and an ANOVA for the CGS. A library of mathematical models was used to map 3AA data against CGS scores. RESULTS Agreement among diplomates using the SDS was slight (κ = 0.19; AC1 = 0.22). The CGS scores differed significantly among diplomates. Best fit of 3AA data against CGS scores yielded the following equation: RS = 9.998 × SG(0.633) × ∑UG(0.174), where RS is a horse's recovery score determined with 3AA, SG is acceleration of the successful attempt to stand, and ∑UG is the sum of accelerations of unsuccessful attempts to stand. CONCLUSIONS AND CLINICAL RELEVANCE Subjective scoring of recovery of horses from anesthesia resulted in poor agreement among diplomates. Subjective scoring may lead to differences in conclusions about recovery quality; thus, there is a need for an objective scoring method. The 3AA system removed subjective bias in evaluations of recovery of horses and warrants further study.
Afficher plus [+] Moins [-]Ability of clinicopathologic variables and clinical examination findings to predict race elimination in endurance horses Texte intégral
2017
Fielding, C Langdon | Meier, Chloe A. | Fellers, Greg K. | Magdesian, K Gary
OBJECTIVE To compare results of point-of-care laboratory testing with standard veterinary clinical examination findings at a single time point during endurance competition to identify horses at risk for elimination. ANIMALS 101 endurance horses participating in the 2013 Western States 160-km (100-mile) endurance ride. PROCEDURES At the 58-km checkpoint, blood samples were collected from all horses. Samples were analyzed for pH, Pco2, base excess, anion gap, PCV, and whole blood concentrations of sodium, potassium, chloride, total carbon dioxide, BUN, glucose, and bicarbonate. Corrected electrolyte and PCV values were calculated on the basis of plasma total protein concentration. Immediately following the blood sample collection, each horse underwent a clinical examination. In addition to standard examination variables, an adjusted heart rate was calculated on the basis of the variable interval between entry into the checkpoint and heart rate recording. A combination of stepwise logistic regression, classification and regression tree analysis, and generalized additive models was used to identify variables that were associated with overall elimination or each of 3 other elimination categories (metabolic elimination, lameness elimination, and elimination for other reasons). RESULTS Corrected whole blood potassium concentration and adjusted heart rate were predictive for overall elimination. Breed, plasma total protein concentration, and attitude were predictive for elimination due to metabolic causes. Whole blood chloride concentration and corrected PCV were predictive for elimination due to lameness. Corrected PCV was predictive for elimination due to other causes. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that for horses in endurance competition, a combination of breed and clinical examination and laboratory variables provided the best prediction of overall elimination.
Afficher plus [+] Moins [-]Effects of prophylactic incisional gastropexy on markers of gastric motility in dogs as determined by use of a novel wireless motility device Texte intégral
2017
Gazzola, Krista M. | Nelson, Laura L. | Fritz, Michele C. | Clancy, Michelle R. | Hauptman, Joe G.
OBJECTIVE To evaluate effects of laparoscopic-assisted incisional gastropexy (LAIG) on gastric motility in dogs by use of a wireless motility device (WMD). ANIMALS 10 healthy client-owned large or giant-breed dogs. PROCEDURES 10 dogs owned by clients interested in prophylactic LAIG were enrolled. To determine effects of LAIG on gastrointestinal motility in dogs during the nonfed state, each dog was evaluated by use of a noninvasive WMD before and > 4 weeks after LAIG. All dogs underwent LAIG, with or without concurrent elective gonadectomy. Data obtained before and after LAIG were analyzed by use of proprietary software to determine the gastric emptying time, small bowel transit time, large bowel transit time, whole bowel transit time, and motility index. RESULTS No changes in variables were detected between measurements obtained before and after prophylactic LAIG. CONCLUSIONS AND CLINICAL RELEVANCE In this study, prophylactic LAIG did not have an effect on gastrointestinal motility. The WMD was tolerated well by all dogs and appeared to be a safe and effective method for evaluating gastrointestinal motility in this population of dogs.
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