Current distribution of sarcoptic mange in wombats   总被引：2，自引：0，他引：2  

RW MARTIN  KA HANDASYDE  LF SKERRATT 《Australian veterinary journal》1998,76(6):411-414

Objective To determine the distribution and prevalence of sarcoptic mange in wombats, particularly the common wombat ( Vombatus ursinus ).
Design Questionnaire survey in two parts.
Procedure Questionnaires were distributed to biologists, rangers, animal carers and naturalists. Part 1 of the questionnaire aimed to determine the present distribution of sarcoptic mange in wombats (103 responses). Part 2 invited respondents to assess the prevalence of sarcoptic mange in wombats over a 3 month period (four responses). Information on wombats from 66 localities was received. Each locality represented an area of about 2500 km².
Results Mange was observed at 93% of localities surveyed and Sarcoptes scabiei was present in common wombats at 52% of localities. Sarcoptic mange was highly prevalent (22%) in two common wombat populations in Victoria. Anecdotal evidence suggested that mange epizootics are sporadic, cause significant morbidity and mortality and have a substantial effect on local abundance. The respondents did not report sarcoptic mange in either northern hairy-nosed wombats ( Lasiorhinus krefftii ) or southern hairy-nosed wombats ( Lasiorhinus latifrons ).
Conclusions Sarcoptic mange occurs in common wombat populations throughout the range of the common wombat including Tasmania and Flinders Island. While mange epizootics are sporadic, they have the potential to threaten the long-term survival of small, remnant populations.  相似文献   

Escherichia coli O157 outbreak in Japan: lessons for Australia     

KA BETTELHEIM 《Australian veterinary journal》1997,75(2):108-108

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Stress and Parturition in the Pig*     

AB Lawrence  KA McLean  S Jarvis  CL Gilbert  JC Petherick 《Reproduction in domestic animals》1997,32(5):231-236

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改进培养方法提高组培快繁技术的初探   总被引：3，自引：4，他引：3  

宋锋惠  史彦江  卡德尔 《经济林研究》2003,21(4):57-59

通过简化培养基成分，去除有机物、琼脂等，可降低试管苗成本；采用自然光替代日光灯，并结合黑暗培养，可减少设备投入．有利于工厂化育苗生产。  相似文献   

Stress exposure during the preimplantation period affects blastocyst lineages and offspring development     

Ján BURKU?  Martina KA?MAROVá  Janka KUBANDOVá  Natália KOKO?OVá  Kamila FABIANOVá  Du?an FABIAN  Juraj KOPPEL  ?tefan ?IKO? 《The Journal of reproduction and development》2015,61(4):325-331

We found retardation of preimplantation embryo growth after exposure to maternal restraint stress during the preimplantation period in our previous study. In the present study, we evaluated the impact of preimplantation maternal restraint stress on the distribution of inner cell mass (ICM) and trophectoderm (TE) cells in mouse blastocysts, and its possible effect on physiological development of offspring. We exposed spontaneously ovulating female mice to restraint stress for 30 min three times a day during the preimplantation period, and this treatment caused a significant increase in blood serum corticosterone concentration. Microscopic evaluation of embryos showed that restraint stress significantly decreased cell counts per blastocyst. Comparing the effect of restraint stress on the two blastocyst cell lineages, we found that the reduction in TE cells was more substantial than the reduction in ICM cells, which resulted in an increased ICM/TE ratio in blastocysts isolated from stressed dams compared with controls. Restraint stress reduced the number of implantation sites in uteri, significantly delayed eye opening in delivered mice, and altered their behavior in terms of two parameters (scratching on the base of an open field test apparatus, time spent in central zone) as well. Moreover, prenatally stressed offspring had significantly lower body weights and in 5-week old females delivered from stressed dams, fat deposits were significantly lower. Our results indicate that exposure to stress during very early pregnancy can have a negative impact on embryonic development with consequences reaching into postnatal life.  相似文献   

Assessment of the potential relationship between egg quality and infectious bronchitis virus infection in Australian layer flocks     

KA Hewson  T Robertson  PA Steer  JM Devlin  AH Noormohammadi  J Ignjatovic 《Australian veterinary journal》2014,92(4):132-138

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Artificial insemination in tench, Tinca tinca L.     

O. LINHART  P. KVASNI&#;KA 《Aquaculture Research》1992,23(2):183-188

Abstract. The sperm of tench, Tinca tinca L., is characterized by a milky colour and consistency, and is of very low density. After collecting the sperm, motion of spermatozoa was recorded even without water activation. A better motility value (value 4·36 on average) was observed in spermatozoa collected in immobilizing solution (collecting medium) and stored for 3h, when compared with spermatozoa without collecting medium. Average total and relative numbers of spermatozoa were 12·16 × 10⁹ per male and 18·50 × 10⁹ per kg of body weight, respectively. When testing the effect of activating solution in artificial propagation of tench, the highest fertilization rates (81·3 and 85% in two cases) were found for NaCl solution with an osmotic concentration of 34 or 69 mOsmol and for fresh water, respectively. The fertility rate was reduced significantly ( P < 0·01) by any increase above 105 mOsmol in NaCl concentration in the activating solution. In the tests of optimal method of artificial fertilization, the highest hatching rate of sac fry (71·35%) was found in sperm collected into immobilizing solution. The application of immobilizing solution significantly increased the number of sac fry at the levels P < 0·1 and P < 0·01, if compared with intact sperm stored for 3 h and fresh sperm, respectively.  相似文献   

Direct binding of protein A, protein G, and anti-IgG conjugates to chicken infectious anemia virus     

B Lucio  K A Schat  S Taylor 《Avian diseases》1991,35(1):180-185

Recombinant Protein A, recombinant Protein G, and anti-chicken-IgG anti-bodies raised in rabbits, goats, or horses were found to bind directly to chicken infectious anemia virus (CIAV). MSB-1 cells infected with the Cux-1 strain of chicken anemia agent, but not to uninfected MSB-1 cells were found to react with fluorescein isothiocyanate conjugates. In an enzyme-linked immunosorbent assay, rabbit anti-chicken horseradish peroxidase conjugate bound directly to CIA-1 CIAV-coated plates. In addition, sera from a low percentage of specific-pathogen-free breeder hens reacted in an indirect fluorescent antibody test to detect CIAV antibodies. These reactions generally disappeared within a month. The breeder flocks were demonstrated to be free of CIAV infection by the susceptibility of their progeny.  相似文献   

Pigeon Health and Disease     

KA Doyle  HMcL Gordon 《Australian veterinary journal》1993,70(7):278-278

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Difference between influences of homologous and heterologous maternal antibodies on response to serotype-2 and serotype-3 Marek's disease vaccines     

D King  D Page  K A Schat  B W Calnek 《Avian diseases》1981,25(1):74-81

Marek's disease (MD) vaccines representing serotypes 2 (SB-1 strain of MD virus) and 3 (FC-126 strain of turkey herpesvirus) were administered to 1-day-old MD-susceptible chicks that either were free of antibodies or carried maternally derived antibodies against SB-1, FC-126, or a serotype-1 MD virus, CU-2 strain. Homologous antibodies delayed the development of vaccine virus viremias and inhibited vaccinal immunity, as judged by protection against challenge with the virulent JM-10 strain of MD virus 7 days postvaccination. Heterologous antibodies had little effect on vaccine responses. Antibodies were shown to interfere with both cell-associated and cell-free vaccine virus.  相似文献