Path coefficient analysis of correlation between breeding cycles of the common myna Acridotheres tristis (Passeriformes: Sturnidae) and its phthirapteran ectoparasites     

Srivastava R  Kumar S  Gupta N  Singh SK  Saxena AK 《Folia parasitologica》2003,50(4):315-316

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Effect of immunization with bovine luteinizing hormone receptor on ovarian function in cats     

Saxena BB  Clavio A  Singh M  Rathnam P  Bukharovich EY  Reimers TJ  Saxena A  Perkins S 《American journal of veterinary research》2003,64(3):292-298

OBJECTIVE: To determine the effect of immunization with bovine luteinizing hormone receptor (LH-R) on ovarian function of cats. ANIMALS: 9 adult female domestic cats. PROCEDURE: 7 cats were immunized with 0.5 mg of LH-R encapsulated in a silastic subdermal implant (3 x 10 mm); 2 served as control cats. Receptors had 80% specific binding to 125I-human chorionic gonadotropin with a binding capacity of 2,682 pM/mg. Cats received booster injections of LH-R. Cats were induced to ovulate with luteinizing hormone (LH) releasing hormone on day 345. Samples of venous blood and vaginal cells were collected through day 395. Observation of estrus behavior continued until day 516. Serum concentrations of estradiol, progesterone, thyroid gland hormones, LH, and LH-R antibody were determined. RESULTS: LH-R antibody was detected in the sera of immunized cats within 21 days after implantation. Detection of LH-R antibody was associated with suppression of serum progesterone to < or = 0.5 ng/mL during the study period, compared with concentrations of 5 to 10 ng/mL in control cats. Immunized cats did not display signs of estrus. Release of LH after administration of LH-releasing hormone indicated an intact hypothalamic-pituitary axis but poor corpus luteum function. Serum estradiol concentrations remained between 30 to 40 pg/mL in immunized and control cats. With the decrease antibody titers, hormone concentrations returned to a pattern consistent with that during fertility. CONCLUSIONS AND CLINICAL RELEVANCE: Active immunization with LH-R suppressed corpus luteum function in cats. The effect was reversible. An LH-R-based antifertility vaccine may have clinical application in other vertebrates.  相似文献   

Unidentified coryneform bacterial strain from cases of polyarthritis in chickens: phenotype and fatty acid profile     

Mohan K  Shroeder-Tucker LC  Karenga D  Dziva F  Harrison A  Muvavarirwa P 《Avian diseases》2002,46(4):1051-1054

We report isolation of a strain of fermentative coryneform bacteria from an outbreak of polyarthritis in chickens. This strain could not be assigned to any recognized bacterial taxon because its peculiar phenotype is not yet reported. The strain possessed phenotypic characteristics and fatty acid profile similar to Erysipelothrix but, on the other hand, exhibited temperature-dependent motility like Listeria. We found no evidence of either Mycoplasma synoviae or Chlamydia infection. Details of the phenotype and fatty acid profile of the isolate and measures undertaken to contain the outbreak have been described.  相似文献   

Ultrasonographic evaluation of urinary bladder in normal,fern fed and enzootic bovine haematuria-affected cattle     

Hoque M  Somvanshi R  Singh GR  Mogha IV 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2002,49(8):403-407

A total of 19 adult hill cattle of both sexes were subjected to trans-rectal ultrasound scanning of urinary bladder to evaluate bladder wall thickness and the presence of space-occupying lesions. The animals were divided into four groups. Eight apparently healthy hill cattle maintained under standard ration served as control (group I) and the remaining II animals were divided into three groups (II, III and IV). Group II animals (n = 8) were fed with different type of ferns which were further divided into subgroups II-P, -D and -B and fed with Polystichum squarrosom (n = 2). Dryopteris juxtaposita (n = 2) and Pteridium aquilinum (n = 4) ferns, respectively. The one animal in group III was a natural case of enzootic bovine haematuria (EBH) and the two animals in group IV were natural cases of microscopic EBH fed with Polystichum squarrosum fern. In group I animals, the average bladder wall thickness was 1.45 mm. The delineation of the bladder wall was uniformly smooth and the echo pattern of the bladder was homogeneously black, which was suggestive of clear urine content. In group II (P, D and B) the average bladder wall thickness of the six animals was 1.87 mm and the sonographic features were within normal limit when compared with controls. In two of the animals of group II-B, the bladder wall was apparently thick (4.36 mm) and there was no intraluminal mass except at one or two focal elevated points. Animals of groups III and IV showed the average bladder wall thickness of 4.86 mm and were characterized by the presence of irregular sessile masses extending into the bladder lumen. The homogeneous anechoic area was reduced centrally due to the presence of a hypoechoic soft tissue mass all around the bladder wall. Post-sonographic urinalysis, biopsy and necropsy of selected cases further confirmed the sonographic findings.  相似文献   

Polymerase chain reaction amplification of 16S-23S spacer region for rapid identification of Salmonella serovars     

Bakshi CS  Singh VP  Malik M  Sharma B  Singh RK 《Acta veterinaria Hungarica》2002,50(2):161-166

Polymerase chain reaction (PCR) was used to amplify the spacer regions between the 16S and 23S genes of rRNA genetic loci of Salmonella serovars for their rapid identification. These genetic loci revealed a significant level of polymorphism in length across the species/serovar lines. When the 16S-23S spacer region amplification products were subjected to agarose electrophoresis, the patterns observed could be used to distinguish all the serovars of Salmonella tested. Unique elements obtained in amplification products were mostly clustered at serovar level, although certain genus-specific patterns were also observed. On the basis of the results obtained, the amplification of 16S-23S ribosomal spacer region could suitably be used in a PCR-based identification method for Salmonella serovars.  相似文献   

Capsular serogroups of Pasteurella multocida isolated from animals in Zimbabwe     

Dziva F  Mohan K  Pawandiwa A 《The Onderstepoort journal of veterinary research》2000,67(4):225-228

Pasteurella multocida is isolated from a variety of disease conditions from different animal species in our diagnostic laboratory. In order to determine serogroup distribution among the isolates, an indirect haemagglutination test using glutaraldehyde-fixed sheep red blood cells was employed. A serological examination of 79 isolates revealed that 47/79 were of capsular serogroup A, 11/79 capsular serogroup D, 4/79 capsular serogroup B and 17/79 were untypable strains. None of the isolates belonged to either serogroup E or F. All those from cases of classical pasteurellosis could be grouped, but a significantly high proportion of those which originated from companion animals were untypable. The significance of these results is discussed. This report appears to be the first detailed information on the prevalence of various serogroups of P. multocida in animals in southern Africa.  相似文献   

Pasteurella gallinarum: Zimbabwean experience of a versatile pathogen     

Mohan K  Dziva F  Chitauro D 《The Onderstepoort journal of veterinary research》2000,67(4):301-305

Pasteurella gallinarum-related outbreaks in chickens and African guinea fowls are described. Four outbreaks were recorded in chickens and one in guinea fowls. Periorbital swelling and keratoconjunctivitis were the consistently present clinical signs in all the diseased birds. In several, swollen hocks and wattles were also discerened. Birds which succumbed to the infection showed petechiation in the internal organs and evidence of airsacculitis. Pasteurella gallinarum was isolated from the lesions and also from conjunctival swabs of the apparently healthy in-contact birds. There was no evidence of concurrent infection with Haemophilus, Mycoplasma or Chlamydia. Quinolone therapy when resorted to on one of the farms resolved the clinical signs. Phenotypes of 28 isolates were studied. The results compared well with the Pasteurella gallinarum isolates reported earlier from elsewhere. It was also found that results of xylose fermentation and ONPG test appear to be a variable character. There is no earlier report of P. gallinarum infection in guinea fowls.  相似文献   

Isolation of Mycoplasma mycoides small colony type from contagious caprine pleuropneumonia in India     

Srivastava NC  Thiaucourt F  Singh VP  Sunder J  Singh VP 《The Veterinary record》2000,147(18):520-521

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Retrospective evaluation of 80 non-surviving buffaloes with diaphragmatic hernia     

Saini NS  Sobti VK  Mirakhur KK  Singh SS  Singh KI  Bansal PS  Singh P  Bhatia R 《The Veterinary record》2000,147(10):275-276

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Immune Responses to Intermediate Strain IBD Vaccine at Different Levels of Maternal Antibody in Broiler Chickens     

Kumar K  Singh KC  Prasad CB 《Tropical animal health and production》2000,32(6):357-360

Tropical Animal Health and Production -  相似文献