A5035578184- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Milk Quality and Mastitis in Dairy Cows
- Animal Behavior and Welfare Studies
- Animal health and immunology
- Effects of Environmental Stressors on Livestock
- Ruminant Nutrition and Digestive Physiology
- Probiotics and Fermented Foods
- Animal Disease Management and Epidemiology
- Microbial infections and disease research
- Animal Genetics and Reproduction
- Reproductive Biology and Fertility
- Veterinary Equine Medical Research
- Growth Hormone and Insulin-like Growth Factors
- Reproductive System and Pregnancy
- Human-Animal Interaction Studies
- Botulinum Toxin and Related Neurological Disorders
- Vector-Borne Animal Diseases
- Helminth infection and control
- Birth, Development, and Health
- Agriculture and Farm Safety
- T-cell and Retrovirus Studies
- Viral gastroenteritis research and epidemiology
- Sperm and Testicular Function
- Congenital Anomalies and Fetal Surgery
University of Veterinary Medicine Hannover, Foundation
2015-2025
University of Veterinary Medicine
2010-2023
Leibniz University Hannover
2015
University of Veterinary Medicine Vienna
2013
Ludwig-Maximilians-Universität München
2001
Instituto Biológico
2001
Urbana University
1991-1992
University of Illinois Urbana-Champaign
1989-1992
Hochschule Hannover
1984-1989
The effects of body condition score (BCS) change and status ante- postpartum (pp) on health reproductive performance in 234 German Holstein cows from eight dairy farms were evaluated. BCS was determined 6 weeks antepartum until 20 pp 2-week intervals. Three 5 progesterone concentrations blood serum to detect the presence luteal tissue as an indicator cyclicity. incidence various diseases, percent cycling cows, measures culling rate assessed. Data subjected logistic regression account for...
Lameness is one of the most challenging problems in dairy industry. Control impeded because farmers often underestimate number lame cows. The objectives this study were to assess German farmers' awareness lameness their herds and determine associations between management practices, farm characteristics as well with education, personality traits attitudes. As a part large cross-sectional study, veterinarians visited farms three structurally different regions Germany: north (n = 253), east...
Pasture-borne parasites like Ostertagia ostertagi have a negative effect on dairy cow health and productivity. The aim of the present study was to assess potential breed-dependent associations O. seropositivity with production traits, i.e. milk yield, fat protein. We describe these in German Holstein (GH) cows, specialised breed, compared dual-purpose Simmental (SIM). Data from 560 farms across Germany housing 93,030 cows were included. Of farms, 383 housed GH 177 SIM. Potential...
SUMMARY Polymorphonuclear neutrophils ( pmn ) from 4 ovariectomized healthy cows were incubated with 0 (control), 10 -8 , -7 and -6 M arachidonic acid metabolites of the cyclo- lipoxygenase pathways for 30 minutes, steroids 2 hours. Immediately after incubation, subjected to following function assays: chemotaxis against zymosan-activated serum, metabolite or steroid at doses given (only control tested), random migration, ingestion 125 I-iododeoxyuridine-labeled Staphylococcus aureus I-IdUR-...
Clostridium (C.) perfringens is the causative agent of several diseases in animals and humans, including histotoxic enteric infections. To gain more insight into occurrence its different toxin-genotypes dairy herds, those toxin genes previously associated with cattle or 662 isolates cultivated from feces, rumen content feed collected 139 farms were characterized by PCR (detecting cpa, cpb, iap, etx, cpe, both allelic variants cpb2). Isolates feces assigned to type A (cpa positive, n = 442) D...
Pasture-borne parasites adversely affect bovine health and productivity worldwide. In Europe, gastrointestinal nematodes, especially Ostertagia ostertagi, the liver fluke Fasciola hepatica lungworm Dictyocaulus viviparus represent most important of dairy cattle. The present study assessed exposure towards these among 646 cattle herds in three parts Germany during 2017–2019 via antibody detection bulk tank milk (BTM). Overall, O. ostertagi levels indicative production losses were detected...
The objective of the present study was to compare two commercially available blood-based pregnancy tests, namely BioPRYN, an ELISA for pregnancy-specific protein B (PSPB), and pregnancy-associated glycoprotein (PAG), early diagnosis in dairy cattle using transrectal ultrasonography as a gold standard. Transrectal conducted 26-58 days after artificial insemination (AI) 197 from 19 farms. Concurrently, blood sample collected determination serum PSPB PAG. palpation performed approximately 120...
The objective of this study was to examine the effects metritis and subclinical hypocalcemia on reduction uterine size in dairy cows using ultrasonography sonomicrometry. Four piezoelectric crystals were implanted via laparotomy into myometrium pregnant horn 12 pluriparous Holstein Friesian 3 weeks before calculated calving date. Sonometric measurements conducted daily from 2 days parturition (= Day 0) until 14 after then every other day 28. Distances between adjacent expressed relation...
It was the aim of this field study to evaluate two different protocols ovulation synchronization for treatment ovarian cysts and their effect on reproductive performance in dairy cows. In addition, factors with a possible influence success pregnancy outcome as well costs per were analysed. The performed 130 German Holsteins diagnosed days 55 60 postpartum. Cows belonging group 1 (n = 65) received modified ovsynch protocol [day 0: 0.15 mg cloprostenol (PGF) + 0.02 buserelin acetate (GnRH);...
Factors affecting bacteriological cure rates (BCR) and new intramammary infections (IMI) during the dry period as well clinical mastitis (CM) early lactation were investigated in 414 German Holstein dairy cows receiving cow therapy.Cows treated with either benethamine benzylpenicillin (300,000 IU), penethamate hydriodide (100,000 framycetin sulphate (100 mg, n = 136), or cefquinome (150 135), benzathine cloxacillin (1,280 143).Overall BCR, IMI, CM at parturition 86.4%, 20.7%, 4.3%,...
It was the aim of this study to examine whether usage vaccine COXEVAC® (Ceva Santé Animale) could reduce consumption antibiotics in Q-fever-positive dairy farms. Additionally, effects other herd-level factors on were investigated. In longitudinal cohort study, 36 farms with vaccination and 13 without participated. all herds, Coxiella burnetii had been directly or indirectly diagnosed. To compare treatment frequency between vaccinated group non-vaccinated group, for each...
Perinatal mortality (PM) is a common issue on dairy farms, leading to calf losses and increased farming costs. The current knowledge about PM in cattle is, however, limited previous studies lack comparability. topic has also primarily been studied Holstein-Friesian cows closely related breeds, while other breeds have largely ignored. Different data collection techniques, definitions of PM, variables statistical approaches further limit the comparability interpretation studies. This article...
From 2016 to 2020, the “PraeRi” study, conducted by three German veterinary universities, was aimed at enhancing animal health and welfare in dairy farms. With 765 farms visited 101,307 animals examined, this study provided a basis for improving welfare. The population comprised different regions representing broad variety of characteristics. To ensure representative estimates, sample size 250 determined each region, employing stratified sampling plan based on farm size. According...
Botulism caused by neurotoxins of Clostridium (C.) botulinum is a rare, but serious life-threatening disease in humans and animals. livestock usually the oral uptake C. (BoNT) via contaminated feed characterized flaccid paralysis. In recent past new syndrome BoNT dairy cattle was postulated. It supposed that able to colonize lower intestine may subsequently produce neurotoxin. The continuous resorption small amounts these then provoke so called "chronic" or "visceral" botulism involving...
Babesia divergens, transmitted by the tick Ixodes ricinus, is most common cause of bovine babesiosis in northern Europe and plays a role as zoonotic pathogen. However, several studies have indicated decline B. divergens prevalence during last decades. Here, we investigate epidemiology on beef production farm Germany, which had not been affected until an initial outbreak 2018. In June 2018, 21 adult cattle died, showing classical symptoms babesiosis. merozoites were detected blood smears...