Abilene, KS, United States
Abilene, KS, United States

Time filter

Source Type

Henry S.,Abilene Animal Hospital | Friendship R.,University of Guelph | Schwartz K.,Iowa State University
Journal of Swine Health and Production | Year: 2011

Porcine periweaning failure to thrive syndrome (PFTS) is a clinical condition characterized by anorexia, lethargy, and progressive debilitation of pigs occurring within 2 to 3 weeks after weaning. In affected populations, there is a striking contrast between the clinically affected pigs, which progress from being normally active to lethargic within days of weaning, and the unaffected members of their cohort, which grow and behave normally. The etiology, pathophysiology, and pathogenesis of PFTS have not been determined, although several infectious agents have been identified in affected pigs. Histopathologic lesions of chronic active rhinitis, superficial gastritis, atrophic enteritis, superficial colitis, and thymic atrophy are observed in most PFTS-affected pigs. The basis for a presumptive diagnosis of PFTS includes the age of onset, the presence of typical clinical signs, the presence of the collective histopathologic lesions, and, importantly, the ruling out of other known swine diseases (for example, porcine circovirus associated disease, swine influenza, porcine reproductive and respiratory syndrome, and bacterial infections). The objectives of this paper are to propose a clinical case definition, describe the characteristic clinical progtession, signs, and observed lesions of PFTS, and to make recommendations for investigation of PFTS-suspected farms.


Holtkamp D.J.,Iowa State University | Polson D.D.,Boehringer Ingelheim | Torremorell M.,University of Minnesota | Morrison B.,University of Minnesota | And 9 more authors.
Journal of Swine Health and Production | Year: 2011

Standardized terminology for the porcine reproductive and respiratory syndrome virus (PRRSV) status of swine herds is necessary to facilitate communication between veterinarians, swine producers, genetic companies, and other industry participants. It is also required for implementation of regional and national efforts towards PRRSV control and elimination. The purpose of this paper is to provide a herd classification system for describing the PRRSV status of herds, based upon a set of definitions reflecting the biology and ecology of PRRSV. The herd classification system was developed by a definitions committee formed jointly by the American Association of Swine Veterinarians (AASV) and the United States Department of Agriculture PRRS-Coordinated Agricultural Project, and was approved by the AASV Board of Directors on March 9, 2010. The committee included veterinarians from private practice and industry, researchers, and representatives from AASV and the National Pork Board. Breeding herds, with or without growing pigs on the same premises, are categorized as Positive Unstable (Category I), Positive Stable (Category II), Provisional Negative (Category III), or Negative (Category IV) on the basis of herd shedding and exposure status. Growing-pig herds are categorized as Positive or Negative. Recommended testing procedures and decision rules for herd classification are detailed.


O'Sullivan T.L.,University of Saskatchewan | O'Sullivan T.L.,University of Guelph | Harding J.C.S.,University of Saskatchewan | Friendship R.,University of Guelph | And 3 more authors.
Journal of Swine Health and Production | Year: 2014

Objectives: To estimate the prevalence of periweaning failure to thrive syndrome (PFTS) in Canadian and American nursery-pig flows, to estimate the percentage of PFTS-affected pigs within an affected nursery flow, and to rank the common clinical signs observed by practitioners associated with PFTS on commercial farms. Materials and methods: A questionnaire was designed, beta tested, and then made available through the American Association of Swine Veterinarians (AASV) and University of Guelph Web sites. Swine practitioners in major swine-producing regions of Canada and the United States completed the questionnaire to estimate the prevalence and impact of PFTS in nursery flows. To raise awareness and to aid in consistent recognition and reporting of the syndrome, a video was produced and accompanied the questionnaire. Oral, scientific-poster, and video presentations were also made at major swine-practitioner meetings across Canada and the United States to promote awareness of the syndrome and questionnaire. Results: Fifty-five questionnaires were completed, with respondents servicing 1974 nursery flows. The reported mean flow prevalence of PFTS was 4.3% (95% CI, 0.9%-8.0%). The within-flow prevalence was reported to be variable (1% to 20%), with cases reported in five provinces and 11 states. Implications: This report provides the first estimate of the mean flow prevalence and impact of PFTS in Canada and the United States. It is reasonable to expect this estimated prevalence to change as we continue to understand the syndrome. Video documentation, including demonstration of the clinical signs associated with PFTS, was an effective method to raise awareness of the syndrome.


Potter M.L.,Abilene Animal Hospital | Tokach L.M.,Abilene Animal Hospital | Dritz S.S.,Kansas State University | Henry S.C.,Abilene Animal Hospital | And 9 more authors.
Journal of Swine Health and Production | Year: 2012

Objectives: To compare the effects of porcine circovirus type 2 (PCV2) vaccination on growth rate, backfat depth, and loin depth of pigs in a high-health herd which contained different genetic lines. Materials and methods: A total of 454 pigs (20.6 ± 1.98 days of age; 6.1 ± 1.27 kg body weight) were used in a 130-day randomized controlled field trial. Genetic designations were A×A (Duroc line), B×B (synthetic White Pietrain line), A×B, and B×A. Pigs were randomly assigned to vaccination treatments (Vaccinated or nonvaccinated Control) within litter by gender (boar or gilt). Vaccinated pigs received two doses of a PCV2 vaccine at 3 and 5 weeks of age. Serum samples were collected and pigs were individually weighed on Days 0 (weaning), 40, and 130 to determine PCV2 viral load, antibody levels, and average daily gain (ADG). Data were analyzed from 417 pigs with complete growth records. Results: The greater ADG from Day 0 to Day 130 for Vaccinated pigs depended on the genetic line (genetic line-by-vaccination interaction; P < .05). The mean weight difference between Vaccinated and Control pigs was almost four times greater in the A×A pigs than in the B×B pigs on Day 130. On average, compared with Control pigs, Vaccinated pigs had lower serum PCV2 viral load levels on Days 40 and 130 (P < .001). Implications: Pig genetic line affects growth rate response to PCV2 vaccination and should be considered a risk factor for circoviral disease expression.


Cino-Ozuna A.G.,Kansas State University | Henry S.,Abilene Animal Hospital | Hesse R.,Kansas State University | Nietfeld J.C.,Kansas State University | And 3 more authors.
Journal of Clinical Microbiology | Year: 2011

Porcine circovirus-associated disease (PCVAD) encompasses a group of wasting syndromes linked to porcine circovirus type 2 (PCV2). This paper describes a new PCV2 disease syndrome, called acute pulmonary edema (APE), which, unlike other PCVAD syndromes, has a peracute onset and is associated with herds vaccinated for PCV2. Copyright © 2011, American Society for Microbiology. All Rights Reserved.


Mollenkopf D.F.,Ohio State University | Mirecki J.M.,Ohio State University | Daniels J.B.,Ohio State University | Funk J.A.,Michigan State University | And 5 more authors.
Applied and Environmental Microbiology | Year: 2013

We report the recovery of Escherichia coli or Klebsiella pneumoniae containing the extended-spectrum β-lactamase gene blaCTX-M from 24 of 1,495 (1.6%) swine fecal samples in 8 of 50 (16%) finishing barns located in 5 U.S. states. We did not detect an association between antimicrobial use and recovery of blaCTX-M. © 2013, American Society for Microbiology.


Tousignant S.J.P.,University of Minnesota | Henry S.C.,Abilene Animal Hospital | Rovira A.,University of Minnesota | Morrison R.B.,University of Minnesota
Journal of Swine Health and Production | Year: 2013

Beginning in the spring of 2011, investigations on farms across the United States led to the anecdotal observation that most weaned pigs tested were vitamin D deficient. Work began on developing an oral supplement to be given to piglets early in life, and a few farms immediately adopted its use. Reports from the field by veterinarians and farm staff described encouraging improvement in piglet performance. This case report describes the effects of oral vitamin D3 on one farm during the summer of 2011, where 387 piglets from 36 gilt litters were assigned to either a group supplemented with vitamin D 3 at 2 days of age or a control group. Pigs in the supplemented group were heavier at weaning and 7 days post weaning, fewer lost weight during the first 7 days post weaning, and their serum 25-hydroxy vitamin D (25-OHD) levels were higher 26 days post weaning.


Flohr J.R.,Kansas State University | Tokach M.D.,Kansas State University | Dritz S.S.,Kansas State University | Derouchey J.M.,Kansas State University | And 10 more authors.
Journal of Animal Science | Year: 2014

Four experiments were conducted to investigate the effects of varying concentrations of supplemental vitamin D3 on pig growth, feed preference, serum 25-hydroxycholecalciferol [25(OH)D3], and bone mineralization of nursing and weanling pigs. In Exp. 1, 270 pigs (1.71 ± 0.01 kg BW) were administered 1 of 3 oral vitamin D3 dosages (none, 40,000, or 80,000 IU vitamin D3) on d 1 or 2 of age. Increasing oral vitamin D3 increased serum 25(OH)D3 on d10 and 20 (quadratic, P < 0.01) and d 30 (linear, P < 0.01). No differences were observed in ADG before weaning or for nursery ADG, ADFI, or G:F. Vitamin D3 concentration had no effect on bone ash concentration or bone histological traits evaluated on d 19 or 35. In Exp. 2, 398 barrows (initially 7 d of age) were used in a 2 × 2 split plot design to determine the influence of vitamin D3 before (none or 40,000 IU vitamin D3 in an oral dose) or after weaning (1,378 or 13,780 IU vitamin D3/kg in nursery diets from d 21 to 31 of age) in a 45-d trial. Before weaning (7 to 21 d of age), oral vitamin D3 dose did not influence growth but increased (P < 0.01) serum 25(OH)D3 at weaning (d21) and tended (P = 0.08) to increase 25(OH)D3 on d 31. Increasing dietary vitamin D3 concentration from d 21 to 31 increased (P < 0.01) serum 25(OH)D3 on d31. Neither the oral vitamin D3 dose nor nursery vitamin D3 supplements influenced nursery ADG, ADFI, or G:F. In Exp. 3, 864 pigs (initially 21 d of age) were allotted to 1 of 2 water solubilized vitamin D3 treatments (none or 16,516 IU/L vitamin D3 provided in the drinking water from d 0 to 10) in a 30-d study. Providing vitamin D3 increased serum 25(OH)D3 concentrations on d 10, 20, and 30; however, vitamin D3 supplementation did not affect overall (d 0 to 30) ADG, ADFI, or G:F. In Exp. 4, 72 pigs were used in a feed preference study consisting of 2 feed preference comparisons. Pigs did not differentiate diets containing either 1,378 or 13,780 IU vitamin D3/kg but consumed less (P < 0.01) of a diet containing 44,100 IU vitamin D3/kg compared with the diet containing 1,378 IU vitamin D3/kg. Overall, these studies demonstrate that supplementing vitamin D3 above basal concentrations used in these studies is effective at increasing circulating 25(OH)D3, but the supplement did not influence growth or bone mineralization. Also, concentrations of vitamin D3 of 44,100 IU/kg of the diet may negatively affect feed preference of nursery pigs. © 2014 American Society of Animal Science. All rights reserved.

Loading Abilene Animal Hospital collaborators
Loading Abilene Animal Hospital collaborators