Triiodothyronine (T3) suppression test. An aid in the diagnosis of mild hyperthyroidism in cats   总被引：2，自引：0，他引：2  

M E Peterson  T K Graves  D A Gamble 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1990,4(5):233-238

The purpose of this study was to develop a T3 suppression test to help in the diagnosis of mild hyperthyroidism in cats. We evaluated the response in circulating T4 concentrations to exogenous T3 (liothyronine) administration in 44 clinically normal cats, 77 cats with hyperthyroidism, and 22 cats with nonthyroidal disease. The test was performed by first collecting blood samples for basal serum T4 and T3 determinations, administering liothyronine at an oral dosage of 25 micrograms three times daily for seven doses, and, on the morning of the third day, again collecting serum samples for T4 and T3 determinations 2 to 4 hours after the seventh dose of liothyronine. The mean basal serum concentrations of T4 (53.1 nmol/L) and T3 (1.8 nmol/L) were significantly higher in the cats with hyperthyroidism than in the normal cats (T4 = 25.3 nmol/L, T3 = 1.3 nmol/L) and the cats with nonthyroidal disease (T4 = 29.5 nmol/L, T3 = 1.4 nmol/L); however, there was a great deal of overlap of basal values between the three groups of cats. Of the 77 cats with mild hyperthyroidism, 41 (53%) had serum T4 values and 55 (71%) had T3 values that were within the established normal ranges. After administration of liothyronine, mean serum T4 concentrations fell much more markedly in the normal cats and the cats with nonthyroidal disease than in the hyperthyroid cats.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Comparison of direct electron microscopy and enzyme immunoassay for the detection of rotaviruses in calves, lambs, piglets and foals   总被引：1，自引：0，他引：1  

GR ELLIS  E DANIELS 《Australian veterinary journal》1988,65(5):133-135

Direct electron microscopy (EM) and enzyme-immunoassay (rotazyme) results for the detection of rotaviruses in 346 enteric specimens from calves, lambs, piglets and foals were compared. The rotazyme test was at least 3 times more sensitive than direct EM in diagnosing infection. Rotavirus antigen was demonstrated by rotazyme in 22% of 280 scour samples and in 27% of 66 samples from non-scouring animals. There was an association between diarrhoea and higher amounts of rotavirus antigen. This prevalence of rotaviruses detected in animals with diarrhoea highlights the significant involvement of other pathogens identified in the study including Eimeria, Cryptosporidia, Escherichia coli, Campylobacter, and other viruses.  相似文献   

Neonatal behavior and nutrition-related mortality in domestic swine.   总被引：1，自引：0，他引：1  

T G Hartsock  H B Graves 《Journal of animal science》1976,42(1):235-241

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Evaluation of Two Reagent Strips and Three Reflectance Meters For Rapid Determination of Blood Glucose Concentrations     

Richard J. Joseph DVM    Kay Allyson BS    Thomas K. Graves  Mark J. Rondeau PhD  Mark E. Peterson DVM 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1987,1(4):170-174

We evaluated three reflectance meters (Accu-Chek II, Glucometer II, and Glucoscan 2000) and two reagent strips (Chemstrip bG and Glucostix) for accuracy and precision in determining blood glucose concentrations in the dog. To evaluate accuracy, we compared results of blood glucose determinations performed on 95 samples using the various strips and meters vs. the glucose concentrations obtained using the glucose-oxidase method on a Beckman Glucose Analyzer. Accuracy was evaluated statistically using least squares regression analysis. To evaluate precision, samples in various ranges of blood glucose concentration were tested repeatedly (20 times within a 1-hour period) on the same reflectance meter. Coefficient of variation (CV) was determined to evaluate reproducibility of results. Overall, there were significant correlations (P less than 0.001) between the laboratory glucose values and the blood glucose concentrations obtained with Chemstrip bG (r = 0.976), Glucostix (r = 0.904), Accu-Chek II (r = 0.986), Glucometer II (r = 0.911) and Glucoscan 2000 (r = 0.944). In the precision study, all three meters had excellent CVs in the normal range (3.6% to 4.9%). However, Accu-Chek II was found to be more precise in the hypoglycemic and hyperglycemic ranges (3.6% and 2.6%, respectively) than either Glucometer II (8.8% and 5.4%) or Glucoscan 2000 (7.8% and 8.2%). The results of this study indicate that all of the meters and reagent strips tested are highly accurate in determining blood glucose concentrations in the dog. However, both in terms of accuracy and reproducibility of results, Accu-Chek II and Chemstrip bG, gave the highest correlation coefficients and, as such, are probably of the greatest clinical value.  相似文献   

Influence of in vivo aging of rabbit spermatozoa caused by infrequent collection on fertility and embryonic mortality     

O C Miller  C N Graves  J R Lodge 《Journal of animal science》1970,30(4):549-551

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Formalin-Treated Foot-and-Mouth Disease Virus: Comparison of Two Adjuvants in Cattle   总被引：9，自引：1，他引：8       下载免费PDF全文

H. R. Cunliffe  J. H. Graves 《Canadian journal of veterinary research》1963,27(8):193-197

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Detection and differentiation of strains of Newcastle Disease Virus by complement fixation.     

W K Butterfield  J H Graves 《Avian diseases》1975,19(2):267-276

A complement-fixation test to detect Newcastle disease virus with antiserum produced in guinea pigs is described. Methodology is given for serum production and for standardization of the test. The test was used to differentiate 13 strains of Newcastle disease virus. Velogenic strains, including isolants form 1970-71 disease outbreaks in California, Florida, and Texas, were poor complement-fixing antigens, whereas lentogenic strains, including LaSota, Hitchner, and England F, were strong complement-fixing antigens. Mesogenic strains ranged from weak to strong in complement-fixing capabilities. This test can be used to differentiate velogenic field isolants from vaccine strains such as LaSota, Hitchner, and Roakin.  相似文献   

Brain and spinal cord lesions in pigs inoculated with swine vesicular disease (UKG strain) virus and coxsackievirus B5.     

V S Monlux  P D McKercher  J H Graves 《American journal of veterinary research》1975,36(12):1745-1749

Pigs inoculated intravenously with swine vesicular disease virus (UKG strain), those inoculated with coxsackievirus B5, and other pigs exposed by pen contact to the same viruses developed diffuse encephalomyelitis. Perivascular cuffing, with lymphocytes and formation of neuroglia cell foci, were most prominent in telencephalon, diencephalon, and mesencephalon. Encephalitis was of mild to severe intensity. Severity of lesions was more extensive and severe in the pigs exposed to swine vesicular disease virus. Pen contact exposure to either of the 2 viruses caused a more severe central nervous system reaction than did intravenous inoculation. The type and the distribution of lesions produced by the 2 viruses indicate that they may be related.  相似文献   

Early response of cattle and swine to inactivated foot-and-mouth disease vaccine   总被引：4，自引：0，他引：4  

J H Graves  P D McKercher  H E Farris  K M Cowan 《Research in veterinary science》1968,9(1):35-40

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Diagnosis of systemic cryptococcosis by fecal cytology in a dog     

Graves TK  Barger AM  Adams B  Krockenberger MB 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2005,34(4):409-412

A 3-year-old Boxer was presented with progressive diarrhea, vomiting, and lethargy of 5-months duration. The dog had watery black feces, a mature neutrophilia, and microcytic anemia. Cytologic evaluation of a direct fecal smear stained with Wright's-Giemsa revealed numerous encapsulated, narrow-based, budding organisms consistent with Cryptococcus sp. Pyogranulomatous inflammation and Cryptococcus organisms also were observed in ultrasound-guided fine-needle aspirates of the small intestine and mesenteric lymph nodes, and in histologic sections of colonic biopsies obtained by endoscopy. Multifocal chorioretinitis by fundic examination was consistent with systemic mycosis, and the reciprocal antigen titer (1600) on a cryptococcal antigen latex agglutination test for Cryptococcus neoformans was markedly increased. Using immunohistochemistry, the organism was identified further as C neoformans var. grubii (C neoformans var. neoformans serotype A). After 3 weeks of antifungal treatment, ultrasound examination revealed urinary bladder wall thickening, and Cryptococcus organisms were found in a urine sediment preparation. After 4 months of treatment, the dog was clinically normal and had no abnormal findings on CBC, serum biochemistry, urinalysis, or fecal cytology; however, the antigen titer remained unchanged, mesenteric lymphadenomegaly and jejunal wall thickening were still evident, and cytologic evaluation of fine-needles aspirates of the jejunal wall revealed budding Cryptococcus organisms. Intestinal involvement in dogs with cryptococcosis is rare, and diagnosis by fecal cytology has not been documented previously.  相似文献