Pathological Conditions of the Reproductive Organs of Male Stray Dogs in the Tropics: Prevalence, Risk Factors, Morphological Findings and Testosterone Concentrations     

A Ortega-Pacheco  JC Rodríguez-Buenfil  JC Segura-Correa  ME Bolio-Gonzalez  M Jiménez-Coello  C Linde Forsberg 《Reproduction in domestic animals》2006,41(5):429-437

The objective of this study was to estimate the prevalence of and risk factors for pathological conditions of the reproductive organs in stray dogs under tropical conditions. Three hundred and eighteen dogs were examined post-mortem in the period from 1 July 2002 to 30 June 2003. Before killing, a blood sample (from the cephalic vein) for testosterone assay was taken. Pathological conditions of the reproductive organs were found in 135 of the dogs (42.5%) and in 175 of the testes (64.8%). The most frequent pathologies found were testicular degeneration, cryptorchidism, testicular hypoplasia and testicular tumours (in 15.1%, 6.6%, 6.6% and 5.4% of the dogs and 15.1, 4.6, 6.0 and 3.5 of the testes, respectively). Transmissible venereal tumour (TVT) was seen in 5.4% of the dogs. Testicular degeneration was more common in old dogs and underweight dogs (p < 0.05). Testicular tumours were 14.3 times more common in cryptorchid dogs. Age was another important factor for the development of testicular tumours (p < 0.05). Lower levels of testosterone concentration (p < 0.05) were observed in dogs with advanced testicular degeneration (0.7 +/- 0.8 nM), dogs with hypoplastic testicles (0.8 +/- 0.9 nM) and dogs with one degenerated and one retained testis or with bilateral cryptorchidism (1.2 +/- 0.9 nM) compared to dogs with one or two normal testes (7.0 +/- 5.5 nM). Testicular volume and weight were significantly lower in degenerated, hypoplastic and retained testes compared with the contralateral normal testis. Some spermatogenic activity was found in three of the retained testes, producing oligozoospermic smears with a high percentage of sperm abnormalities. No comparable epidemiological data about male pathological conditions of the reproductive organs in the dog is available. The prevalence found in this study, yet, appears high.  相似文献   

Aortic occlusion caused by a bullet     

V D Stauffer  T M Craig 《Journal of the American Veterinary Medical Association》1970,157(6):840-841

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聚丙烯酰胺防治坡地水土流失田间试验研究   总被引：14，自引：1，他引：13  

杜尧东  夏海江 《水土保持学报》2000,14(3):10-13

坡地篱用聚丙烯酰胺可以减少地表径流,提高土壤含水量,促进土壤沉降,增强土壤结构性和水稳性,因而提高了土壤的持水性和抗蚀性,减少了土壤侵蚀量和肥力流失量,有利于作物增产。施用聚丙烯酰胺可使产量增加１８．７％～３２．４％。施用聚丙烯酰胺对环境无不良影响,而且投入费用较低,是一条值得探索的防治坡地水土流失的新途径。  相似文献   

Standing Laparoscopic Peritoneal Flap Hernioplasty of the Vaginal Rings does not Modify the Sperm Production and Motility Characteristics in Intact Male Horses     

LA Gracia‐Calvo  LJ Ezquerra  M Martín‐Cuervo  ME Durán  H Tapio  JM Gallardo  FJ Peña  C Ortega‐Ferrusola 《Reproduction in domestic animals》2014,49(6):1043-1048

Laparoscopic hernioplasty techniques have been developed in the recent years to avoid the recurrence of inguinal hernias and to spare the testicles for breeding purposes in stallions. However, there have been no previous comprehensive and systematic studies of the reproductive outcomes and prognoses for stallions after inguinal hernioplasty. Therefore, the objective of this study was to assess the possible effects of one of these techniques (standing laparoscopic peritoneal flap hernioplasty) on the sperm production and motility characteristics of six healthy stallions that received this procedure based on 1‐year follow‐ups. There were no significant differences in the measured sperm variables (assessments based on the DSO, MOT, PMOT, VSL, VCL and VAP) during 1‐year follow‐ups.  相似文献   

On the Quantum Nature of the Shared Proton in Hydrogen Bonds     

ME Tuckerman  D Marx  ML Klein  M Parrinello 《Science (New York, N.Y.)》1997,275(5301):817-820

The relative influence of thermal and quantum fluctuations on the proton transfer properties of the charged water complexes H5O2+ and H3O2- was investigated with the use of ab initio techniques. These small systems can be considered as prototypical representatives of strong and intermediate-strength hydrogen bonds. The shared proton in the strongly hydrogen bonded H5O2+ behaved in an essentially classical manner, whereas in the H3O2- low-barrier hydrogen bond, quantum zero-point motion played a crucial role even at room temperature. This behavior can be traced back to a small difference in the oxygen-oxygen separation and hence to the strength of the hydrogen bond.  相似文献   

Total synthesis and cloning of a gene coding for the ribonuclease S protein   总被引：5，自引：0，他引：5  

K P Nambiar  J Stackhouse  D M Stauffer  W P Kennedy  J K Eldredge  S A Benner 《Science (New York, N.Y.)》1984,223(4642):1299-1301

A gene for ribonuclease S protein, has been chemically synthesized and cloned. The gene is designed to have 25 specific restriction endonuclease sites spaced at short intervals, permitting its structure to be rapidly modified. This flexibility facilitates tests of hypotheses relating the primary structure of the enzyme to its physical and catalytic behavior.  相似文献   

Gender differences in academic rank among faculty surgeons at US veterinary schools in 2019     

Michelle A. Giuffrida VMD  MSCE  DACVS-SA  Michele A. Steffey DVM  DACVS-SA  Ingrid M. Balsa DVM  ME  DACVS-SA  Samantha L. Morello DVM  DACVS-LA  Amy S. Kapatkin DVM  MS  DACVS 《Veterinary surgery : VS》2020,49(5):852-859

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Expression of Maternal Transcripts During Bovine Oocyte In Vitro Maturation is Affected by Donor Age     

R Romar  T De Santis  P Papillier  C Perreau  A Thélie  ME Dell’Aquila  P Mermillod  R Dalbiès‐Tran 《Reproduction in domestic animals》2011,46(1):e23-e30

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GENERAL ANAESTHESIA IN THE HORSE IN THE UPRIGHT POSITION: A COMPARISON WITH LATERAL RECUMBENCY USING CLINICAL AND RESPIRATORY DATA     

U. Schatzmann  D. Hotz  J.L. Stauffer  N. Hess 《Veterinary anaesthesia and analgesia》1991,18(Z1):291-299

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Optimization of a species-specific polymerase chain reaction assay for identification of Pentatrichomonas hominis in canine fecal specimens     

Gookin JL  Stauffer SH  Coccaro MR  Marcotte MJ  Levy MG 《American journal of veterinary research》2007,68(7):783-787

OBJECTIVE: To determine the optimum reaction conditions and detection limits of PCR assay for identification of Pentatrichomonas hominis in DNA extracted from canine feces. SAMPLE POPULATION: DNA extracted from feces of 4 dogs with diarrhea from which trichomonads were observed, 81 dogs that had feces submitted to a diagnostic laboratory, and 19 dogs residing in a laboratory animal facility. PROCEDURES: Optimum reaction conditions and absolute and practical detection limits of 2 P hominis 18S species-specific primer pairs were determined by use of an in vitro cultivated canine isolate of P hominis in the presence and absence of canine feces. The optimized PCR assay was applied to amplification of P hominis 18S rRNA genes from DNA extracted from the feces of dogs. RESULTS: Under optimized conditions, a primer pair was identified as able to detect as few as 1 P hominis organism/180-mg fecal sample. The PCR assay identified P hominis in diarrheic feces of 4 dogs in which trichomonads were seen by light microscopy. The P hominis genes were not amplified from other fecal samples examined. CONCLUSIONS AND CLINICAL RELEVANCE: Molecular identification of P hominis in feces of 4 dogs with trichomonosis and diarrhea reported here validates the identity of this species in such infections. Sensitive and specific PCR amplification of P hominis 18S rRNA genes from DNA extracted from feces will directly facilitate studies examining pathogenicity of this trichomonad and enable differentiation of P hominis from other known or novel species of trichomonads that may infect the gastrointestinal tract of dogs.  相似文献