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Sirvi Autor "Orro, Toomas" järgi

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  • Pisipilt
    Kirje
    Association of acute phase proteins with group size in rearing calves
    (2015) Vuori, Tinja-Maria Karoliina; Orro, Toomas; Orro, Toomas (juhendaja)
    The aim of this study was to investigate the association between group size and serum acute phase protein (APP) concentration in calves. Study hypothesis was that smaller groups would have lower APP serum concentrations. Additional questions studied were association of serum APP levels to growth rate, and association of group size to growth rate. Experiment site on calf rearing farm comprised of two all-in-all-out units, divided to one pen for 40 calves (control-group) and four pens for 10 calves each (test-group). Test material was 6 calf batches and 480 calves. Calves were examined and blood samples taken three times during 50 days of growth period, first time directly after arrival to facility, and then at three week intervals. In laboratory, blood samples were analysed for serum amyloid A (SAA) and haptoglobin (Hp) levels. The serum concentration of SAA and Hp was higher in the test group than in the control group on the third sampling. This disproves the study hypothesis. Further investigation on the reasons of the unexpected result was suggested. High SAA level on the first sampling was found to prognosticate weaker growth rate in calves. Despite the statistical relevance of the result, its practical applications are limited, as the difference in growth rate is not practically relevant. Group size was found to have no statistically relevant association with growth rate.
  • Pisipilt
    Kirje
    Lühiartikkel: PGF2α ja parenteraalselt manustatava tseftofuuri kasutamine poegimisjärgsete emakapõletike ravis lüpsilehmadel
    (Estonian Academic Agricultural Society, 2017) Jeremejeva, Julia; Orro, Toomas; Kask, Kalle; Eesti Maaülikool. Veterinaarmeditsiini ja loomakasvatuse instituut
    Present study was designed to get additional knowledge about treatment of postpartum (PP) clinical metritis (CM) and clinical endometritis (CE), using combination of systemic antibiotics with administration of prostaglandin F2α (PGF2α), to determine the optimal time of treatment, to study effect of this treatment on clinical, physiological and fertility parameters. Late pregnant dairy cows with diagnosed CM and CE were divided to the experimental and positive control groups and negative control groups were composed of healthy cows. Measurements of body temperature, examination of general health status and vaginal discharge, bacteriological and cytological examinations, determination of plasma or milk progesterone, measuring of acute phase proteins and data of fertility parameters were used for evaluation of treatment success. Using of combination of systemic administrations of ceftiofur with two injections of PGF2α at intervals of 8 h was compared with using of combination of intramuscular administration of ceftiofur with flunixin. Treatment of CE using systemic administrations of ceftiofur with two injections of PGF2α with an interval of 8 h in the early PP (5–10 day after calving) was compared with treatment in the late PP (30–35 day PP). The findings of the present study indicate that treatment of CM and CE using flunixin in addition to parenteral antibiotic did not improve clinical cure, inflammatory parameters or elimination of bacteria from the uterus. Regardless of more severe inflammation that was detected in animals from the group treated by parenteral administration of antibiotic with PGF2α they showed the same fertility parameters as healthy animals. Results of this study suggests that treatment of CE in the early PP period, using systemic administration of ceftiofur with two injections of PGF2α at an interval of 8 h, could be more preferable to using the same treatment in the late PP.
  • Pisipilt
    Kirje
    Multiblock analysis reveals key areas and risk factors for dairy cow losses : [presentation]
    (Estonian University of Life Sciences, 2023) Mõtus, Kerli; Viidu, Dagni-Alice; Rilanto, Triin; Niine, Tarmo; Orro, Toomas; Viltrop, Arvo; Bougeard, Stephanie
    Describe the relative contribution of the production areas (thematic blocks) to cow losses characterized by herd on farm mortality risk (MR), culling rates (CR) and mean age of culled cows (MAofCC). Also, the study aimed to identify within each block, the variables mostly contributing to the cow losses.
  • Pisipilt
    Kirje
    Risk factors for honey bee (Apis mellifera L.) mortality in Estonian apiaries during 2012–2013
    (Estonian University of Life Sciences, 2022) Tummeleht, Lea; Orro, Toomas; Viltrop, Arvo; Estonian University of Life Sciences. Institute of Veterinary Medicine and Animal Sciences
    In light of the global increase in honey bee colony losses, risk factors regarding beekeeping management practices and honey bee diseases have been studied intensively during the last decade. Some risk factors have been outlined, but the correlation of evidence between relevant factors coinciding with honey bee mortality still needs to be clarified. The current study used the two-year data collected in frames of the European Commission EPILOBEE project. Previously, the data from Estonian apiaries were analysed together with the data from all 17 participating European countries in the consortium. In the current study, data from Estonian apiaries were targeted separately. In total, 196 apiaries containing 2,439 colonies all over Estonia were included in this dataset. The study aimed to clarify the risk factors that would predict colony losses in Estonia. The main factors increasing colony mortality after winter were the size of the apiary, Varroa destructor mite count, infestation with Paenibacillus larvae, and lack of farmlands around the apiary. No significant risk factors in relation to honey bee summer mortality were detected.
  • Pisipilt
    Kirje
    Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2014" postrid
    (Eesti Maaülikool, 2014) Anton, Dea; Soidla, Riina; Püssa, Tõnu; Ilves-Luht, Aire; Harzai, Hedi; LIng, Katri; Kaart, Tanel; Soomets, Ursel; Kilk, Kalle; Ots, Meelis; Jeremejeva, Julia; Orro, Toomas; Kask, Kalle; Kaldre, Katrin; Haugjärv, Kerli; Liiva, Mari; Gross, Riho; Kass, Marko; Mäesaar, Mihkel; Roasto, Mati; Meremäe, Kadrin; Kramarenko, Toomas; Muutra, Kaisa; Raaperi, Kerli; Viltrop, Arvo; Saar, Tiiu; Põdersoo, Diivi; Golovljova, Irina; Tefanova, Valentina; Soonberg, Maria; Arney, David; Tänavots, Alo; Kaart, Tanel; Kiiman, Heli
    Dea Anton, Riina Soidla, Tõnu Püssa. Analüüsid tomatiga rikastatud lihatoodetes.
  • Pisipilt
    Kirje
    Terve loom ja tervislik toit : konverentsi "Terve loom ja tervislik toit 2017" postrid
    (Eesti Maaülikool, 2017) Mõtus, Kerli; Viltrop, Arvo; Emanuelson, Ulf; Raudsepp, Piret; Libek, Elmo; Rätsep, Reelika; Kikas, Ave; Libek, Asta-Virve; Arus, Liina; Kaldmäe, Hedi; Bleive, Uko; Ausmees, Kristo; Ehrlich-Peets, Kersti; Vallas, Mirjam; Veskioja, Andre; Rammul, Kadi; Rehema, Aune; Zilmer, Mihkel; Songisepp, Epp; Kullisaar, Tiiu; Karis, Priit; Jaakson, Hanno; Ling, Katri; Ilves-Luht, Aire; Samarütel, Jaak; Valdmann, Andres; Reimann, Ene; Pärn, Pille; Bruckmaier, Rupert M.; Gross, Josef; Kaart, Tanel; Ots, Meelis; Valdmann, Merle; Valdmann, Andres; Leming, Ragnar; Kaasik, Allan; Kruus, Eha; Lauringson, Enn; Põldma, Priit; Timonen, Anri Aino Elisa; Katholm, Jørgen; Petersen, Anders; Kalmus, Piret; Reimus, Kaari; Orro, Toomas; Emanuelson, Ulf; Niine, Tarmo; Lassen, Brian; Mäesaar, Mihkel; Roasto, Mati; Runin, Maksim; Olt, Andres; Mark, Elina; Pärn, Pille; Kurõkin, Jevgeni; Kavak, Ants; Reilent, Andres; Jaakma, Ülle
    Kerli Mõtus, Arvo Viltrop, Ulf Emanuelson. Ammlehmade farmis hukkumise riskitegurid ekstensiivse pidamisviisiga lihaveisekarjades.