Passive immunization in neonatal piglets in natural rearing--effects of birth order, birth weight, litter size and parity     

Klobasa F  Schröder C  Stroot C  Henning M 《Berliner und Münchener tier?rztliche Wochenschrift》2004,117(1-2):19-23

603 neonatal piglets (German Landrace) were investigated for passive immunization affected by birth order, birth weight, litter size and parity. Concentrations of immunoglobulins in the blood serum of piglets on the first day of life served as measure for passive immunization. Blood samples were drawn at 12, 18 and 24 hours post partum. Quantitative measurements of immunoglobulin classes were carried out by radial immunodiffusion. There was a significant effect of birth order, because of the rapid changes in colostrum composition between onset of birth and the last piglet of each litter. The effect of birth weight was only partly significant and different for the immunoglobulin classes. There was no significant effect of litter size on passive immunization. Parity had a significant positive effect on IgG- and IgA-concentrations in sow's colostrum with litter two to six, parity 1 and 2 lead to highest IgM concentrations in the blood serum of piglets.  相似文献   

Antimicrobial susceptibility testing of bacteria isolated from animals: considerations concerning the predefinition of breakpoints from the clinical pharmacological viewpoint     

Kietzmann M  Böttner A  Hafez HM  Kehrenberg C  Klarmann D  Krabisch P  Kühn T  Luhofer G  Richter A  Schwarz S  Traeder W  Waldmann KH  Wallmann J  Werckenthin C;Arbeitsgruppe "Antibiotikaresistenz" der Deutschen Veterinärmedizinischen;Gesellschaft eV 《Berliner und Münchener tier?rztliche Wochenschrift》2004,117(3-4):81-87

In vitro susceptibility tests are performed to receive information for selecting the most suitable antibacterial agent. As result of in vitro susceptibility tests, the minimum inhibitory concentration (MIC) indicates bacteria as resistant or sensitive. To determine MIC, therapeutically relevant breakpoints have to be defined. Microbiological criteria, chemical and physical characteristics as well as pharmacokinetic and toxicological (tolerance) properties of the antimicrobial compounds have to be considered in the selection of the therapeutic agent in addition to clinical experiences. Using some concentration and time dependent antibiotics as examples, it is demonstrated that the above mentioned criteria are not sufficiently considered in currently defined breakpoints.  相似文献   

Results from a German interlaboratory test to establish the broth microdilution method for the determination of the minimum inhibitory concentration of bacteria from animals     

Wallmann J  Böttner A  Hafez HM  Kehrenberg C  Kietzmann M  Klarmann D  Klein G  Krabisch P  Kühn T  Luhofer G  Richter A  Schwarz S  Sigge C  Traeder W  Waldmann KH  Werckenthin C  Zschiesche E 《Berliner und Münchener tier?rztliche Wochenschrift》2005,118(5-6):205-213

In accordance with NCCLS guideline M31-A2, the DVG working group "antimicrobial resistance" developed a standard operating procedure (SOP) for the determination of the minimal inhibitory concentration (MIC) of antimicrobial agents by broth microdilution. This SOP was evaluated for its fitness for use in a national interlaboratory test. A total of 32 participating laboratories tested five strains (including two internationally accepted reference strains and three field strains representing in total three different bacterial species) three times at a one week interval each, using uniform microtitre plates. In 31 of the 32 laboratories more than 80% of MIC determinations performed yielded values in the expected range. In total 94.0% of the results were reproducible, with a lesser deviation of 4.0% from the expected values for laboratories performing MIC determination as a matter of routine (46.9%), compared to 7.9% for laboratories without such routine (53.1%). Comparing the consistency of results on the basis of the tested strains, a higher reproducibility of the results was observed for reference strains (96.1%) than for field strains (92.6%). In particular results obtained for the Streptococcus uberis field strain were afflicted with a higher error ratio (98 deviations from the expected values). Among the tested antimicrobial agents, a higher variability of results was recorded only for gentamicin with 16.7% divergent MIC determinations (mean value 6.0%). The high reproducibility of the results confirmed by this interlaboratory study underlines the robustness of the developed SOP as well as broth microdilutions as the method of choice for MIC determina tion.  相似文献   

Cross-resistance between antimicrobial agents used in veterinary medicine: molecular background and practical consequences for susceptibility testing     

Werckenthin C  Böttner A  Hafez HM  Hartmann K  Kaske M  Kehrenberg C  Kietzmann M  Klarmann D  Klein G  Krabisch P  Kühn T  Luhofer G  Richter A  Schulz B  Schwarz S  Sigge C  Traeder W  Waldmann KH  Wallmann J;Arbeitsgruppe "Antibiotikarsistenz" der Deutschen Veterinärmedizinischen Gesellschaft 《Berliner und Münchener tier?rztliche Wochenschrift》2005,118(11-12):471-480

Phenotypic resistance of veterinary pathogens to more than one antimicrobial agent (multi-resistance) may be caused by intrinsic resistance to the antimicrobial agents, acquired cross-resistance, or acquired co-resistance. Known cross-resistances allow to select so-called "representative substances" which are tested and the results of which can also be regarded as being valid for other members of the same class of antimicrobial agents. In general, a limitation in the number of antimicrobial agents to be tested in routine diagnostics is necessary because of capacity and cost efficiency. This is of particular relevance when the broth microdilution method - recommended as the method of choice - with 96-well microtiter plates is used. The knowledge about the relationship between different resistance phenotypes and the corresponding resistance mechanisms is of major value for both, the laboratory personnel and the veterinary practitioner. This review explains how "representative substances" for the most relevant classes of antimicrobial agents used in veterinary medicine are chosen on the basis of known cross-resistances.  相似文献   

Distribution and activity levels of matrix metalloproteinase 2 and 9 in canine and feline osteosarcoma     

Christiane Gebhard  Andrea Fuchs-Baumgartinger  Ebrahim Razzazi-Fazeli  Ingrid Miller  Ingrid Walter 《Canadian journal of veterinary research》2016,80(1):66-73

Overexpression of matrix metalloproteinases (MMPs) has been associated with increased tumor aggressiveness and metastasis dissemination. We investigated whether the contrasting metastatic behavior of feline and canine osteosarcoma is related to levels and activities of MMP2 and MMP9. Zymography and immunohistochemistry were used to determine expression levels of MMP2 and MMP9 in canine and feline osteosarcoma. Using immunohistochemistry, increased MMP9 levels were identified in most canine osteosarcomas, whereas cat samples more often displayed moderate levels. High levels of pro-MMP9, pro-MMP2, and active MMP2 were detected by gelatin zymography in both species, with significantly higher values for active MMP2 in canine osteosarcoma. These findings indicate that MMP2 is probably involved in canine and feline osteosarcoma and their expression and activity could be associated with the different metastatic behavior of canine and feline osteosarcoma.  相似文献   

Carbohydrate analysis of plant materials with uronic acid-containing polysaccharides–A comparison between different hydrolysis and subsequent chromatographic analytical techniques     

Stefan Willför  Andrey Pranovich  Tarja Tamminen  Juergen Puls  Christiane Laine  Anna Suurnäkki  Bodo Saake  Kati Uotila  Helena Simolin  Jarl Hemming  Bjarne Holmbom 《Industrial Crops and Products》2009,29(2-3):571-580

Acid hydrolysis, acid methanolysis, and enzymatic hydrolysis were compared for depolymerization of five different plant materials containing uronic acids. The analyzed plant materials were oat spelt, wheat straw, spruce thermomechanical pulp, aspen stemwood, and totally chlorine-free (TCF) bleached hardwood kraft pulp. Furthermore, GC (using both HP-1 and HP-5 capillary columns and FID and MSD detectors), HPAEC-PAD, and HPAEC-Borate techniques were compared for subsequent analysis of the released monosaccharides. It was shown that acid methanolysis combined with GC analysis is a convenient method for obtaining the sugar unit composition and amount of non-crystalline polysaccharides in different plant materials. The methanolysis method was generally superior to the hydrolysis method for xylan- and uronic acid-containing samples. However, acid and enzymatic hydrolysis showed the highest recoveries for bleached chemical pulp samples. Acid hydrolysis is also required for crystalline polysaccharides, but the strong acid conditions evidently lead to degradation of labile sugars. The plant methanolysates were not suitable as such for analysis on an HPAEC-PAD system. For analysis of the total amount of sugar units, hence including cellulose, other non-crystalline hemicelluloses, and pectins, a combination of the methanolysis and hydrolysis methods is recommended.  相似文献   

First report of Neophloeospora maculans causing leaf spots in Morus nigra and M. alba in Brazil     

da Costa  Christiane Almeida  Veloso  Josiene Silva  de Oliveira  Bruno Ferreira  Lourenço  Valdir  Reis  Ailton 《植物病害和植物保护杂志》2021,128(1):317-321

Journal of Plant Diseases and Protection - Mulberry (Morus spp.), represents a set of plants grown in Brazil for production of fruits, leaves for feeding silkworms and ruminant animals, and for...  相似文献   

Primary immune-mediated hemolytic anemia in 19 cats: diagnosis, therapy, and outcome (1998-2004)     

Kohn B  Weingart C  Eckmann V  Ottenjann M  Leibold W 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2006,20(1):159-166

Immune-mediated hemolytic anemia (IMHA) occurs less frequently in cats than in dogs. The value of the Coombs' test (CT) has been questioned, but detailed surveys of its use are lacking. The objective of this study was to describe 19 cats with primary IMHA (pIMHA) and to examine the diagnostic value of the direct CT. The CT was performed in 92 cats; it was negative in 5 healthy, in 9 sick nonanemic, and in 55 cats with different types of anemia. The CT was positive in 18 anemic cats (2 feline leukemia virus (FeLV) positive, 1 with cholangiohepatitis, 15 with no underlying disease). Moreover, agglutination persisted after saline washing in 5 anemic cats (1 lymphoma, 4 pIMHA). Inclusion criteria for pIMHA were a positive CT (15) or persistent agglutination (4), and the exclusion of other diseases. The age of the 19 cats ranged from 0.5 to 9 years (median, 2 years); male cats were overrepresented. The PCV on admission was 6-22% (median, 12%). The anemia was nonregenerative in 11 cats. Additional abnormal laboratory results were leukocytosis (2), lymphocytosis (6), hyperbilirubinemia (13), hyperglobulimemia (10), and increased liver enzyme activities (10). Initial treatment consisted of blood transfusions (10), crystalloids (11), prednisolone (19), antibiotics (19), and H2-blockers (11). Four of 17 cats were euthanized 9, 63, 240 and 2,160 days after initial presentation (mortality rate, 23.5%). Relapses were reported in 5 of 16 cases (31%). Thus, pIMHA appears to occur more frequently than recognized previously, with a more favorable prognosis in cats than in dogs. The CT was useful in identifying immune-mediated pathogenesis.  相似文献   

Evaluation of acoustic wave propagation velocities in the ocular lens and vitreous tissues of pigs, dogs, and rabbits     

Görig C  Varghese T  Stiles T  van den Broek J  Zagzebski JA  Murphy CJ 《American journal of veterinary research》2006,67(2):288-295

OBJECTIVE: To evaluate propagation velocity of acoustic waves through the lens and vitreous body of pigs, dogs, and rabbits and determine whether there were associations between acoustic wave speed and age, temperature, and time after enucleation. SAMPLE POPULATION: 9 pig, 40 dog, and 20 rabbit lenses and 16 pig, 17 dog, and 23 rabbit vitreous bodies. PROCEDURE: Acoustic wave velocities through the ocular structures were measured by use of the substitution technique. RESULTS: Mean sound wave velocities in lenses of pigs, dogs, and rabbits were 1,681, 1,707, and 1,731 m/s, respectively, at 36 degrees C. Mean sound wave velocities in the vitreous body of pigs, dogs, and rabbits were 1,535, 1,535, and 1,534 m/s, respectively, at 38 degrees C. The sound wave speed through the vitreous humor, but not the lens, increased linearly with temperature. An association between wave speed and age was observed in the rabbit tissues. Time after enucleation did not affect the velocity of sound in the lens or vitreous body. The sound wave speed conversion factors for lenses, calculated with respect to human ocular tissue at 36 degrees C, were 1.024, 1.040, and 1.055 for pig, dog, and rabbit lenses, respectively. CONCLUSIONS AND CLINICAL RELEVANCE: Conversion factors for the speed of sound through lens tissues are needed to avoid underestimation of the thickness of the lens and axial length of the eye in dogs during comparative A-mode ultrasound examinations. These findings are important for accurate calculation of intraocular lens power required to achieve emmetropia in veterinary patients after surgical lens extraction.  相似文献   

Comparison of the use of new handheld tonometers and established applanation tonometers in dogs     

Görig C  Coenen RT  Stades FC  Djajadiningrat-Laanen SC  Boevé MH 《American journal of veterinary research》2006,67(1):134-144

OBJECTIVE: To examine the practical aspects, accuracy, and reproducibility of 2 new automatic handheld tonometers in dogs and compare them with results for 2 established applanation tonometers. ANIMALS: 15 freshly enucleated canine eyes for manometric evaluation and 20 conscious research dogs, 20 client-owned dogs, and 12 dogs with acute glaucoma for clinical tonometry. PROCEDURE: Calibration curves were determined for all 4 tonometers on 15 enucleated canine eyes. Intraocular pressure (IOP) was measured with each tonometer consecutively in conscious dogs, with the MacKay-Marg applanation tonometer as the reference device. Measurements were repeated in 20 sedated dogs. An induction-impact tonometer was evaluated clinically on dogs with acute glaucoma. Additionally, measurements obtained by an experienced and an inexperienced examiner and with or without use of topical anesthesia were compared. RESULTS: The portable pneumatonometer was cumbersome and time-consuming. Compared with results for the reference applanation tonometer, and confirmed by manometry, the portable pneumatonometer increasingly underestimated actual IOP values with increasing IOP. The induction-impact tonometer provided accurate and reproducible measurement values. There was a significant strong correlation between the IOP values obtained by the 2 examiners (r2, 0.82) and also with or without topical anesthesia (r2, 0.86). In dogs with glaucoma, the fitted line comparing values for the reference applanation tonometer and induction-impact tonometer closely resembled an ideal 1:1 relationship. CONCLUSIONS AND CLINICAL RELEVANCE: Use of the portable pneumatonometer in dogs appears to have disadvantages. The induction-impact tonometer appears to provide a promising alternative to the use of applanation tonometers in dogs.  相似文献