Browsing by Person "Steffl, Martin"

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Bulbus destruction by choroidal melanocytoma in a dog: a 3-year history
(2022) Nautscher, Nadine; Steffl, Martin; Schmon, Katharina; Ludwig, Eva
A 3-year-old male Slovak Hound with retinal detachment was presented. The causative intraocular mass was detected by ultrasonography, and the course of the disease was monitored over a 3-year period. Enucleation was performed due to secondary glaucoma. A benign choroidal melanocytoma was diagnosed by histopathology. To our knowledge, this is the first report that describes the disease over such a long period of time. The mild course of the disease questions enucleation of eyes with no or minor symptoms. Conventional treatment may be a suitable alternative to surgery for dogs with high anesthesia risks.
A prospective exploratory study on potential systemic causes and risk factors for subconjunctival bleeding in neonatal calves
(2025) Steffl, Martin; Euchner, Katharina; Nautscher, Nadine; Euchner, Katharina; Institute of Animal Science, University of Hohenheim, 70593 Stuttgart, Germany; (K.E.); (N.N.); Nautscher, Nadine; Institute of Animal Science, University of Hohenheim, 70593 Stuttgart, Germany; (K.E.); (N.N.); Benoit-Biancamano, Marie-Odile; Institute of Animal Science, University of Hohenheim, 70593 Stuttgart, Germany; (K.E.); (N.N.); Vanore, Maria; Institute of Animal Science, University of Hohenheim, 70593 Stuttgart, Germany; (K.E.); (N.N.); Benoit-Biancamano, Marie-Odile; Vanore, Maria
Subconjunctival bleeding in neonatal calves is most commonly seen in association with birth trauma. There are currently no investigations available that examine the systemic causes of this phenomenon. In this prospective and exploratory case–control study, seven out of eighty neonatal calves examined over a two-year period were born with subconjunctival bleeding. The anatomical location of the subconjunctival bleeding and details related to the cow’s and calf’s parturitional and gestational history were recorded. Blood samples from cases and controls ( n = 7) were analyzed hematologically, and the serum lysyl oxidase-like enzyme 4 (LOXL4) concentration was determined through an ELISA to establish evidence for possible structural, copper-dependent vascular abnormalities. We found no significant difference in the clinical data of both groups. Hematological examinations revealed no evidence of anemia or thrombocytopenia. Additionally, no significant differences in differential leukocyte counts were observed between the different groups. However, the neutrophil–lymphocyte ratio (NLR) demonstrated a significant difference between the calves with subconjunctival bleeding and controls. The serum LOXL4 protein concentration was not significantly different in calves with subconjunctival bleeding compared to controls. In conclusion, our clinical, hematological, and biochemical data provided no evidence for potential systemic causes of subconjunctival bleeding. However, these results must be considered in light of this study’s small sample size and thus low statistical power.
Subconjunctival bleedings in neonatal calves: a case series report
(2022) Steffl, Martin; Nautscher, Nadine
Background: In animals, only few reports exist about the occurrence and causes of subconjunctival bleedings, especially in newborn calves. Most case reports and studies showed that the major risk factors for subconjunctival bleedings in animals are traumatic events such as birth trauma and traffic accidents, respectively. In neonatal babies, it is suggested that compression of the thorax and abdomen during delivery or forces generated in utero during labor may raise venous pressure to conjunctival vessels and can cause subconjunctival bleedings. Results: The incidence of bleedings in neonatal Holstein–Friesian calves was 2.4 per cent of 289 neonatal calves examined over a six-year period. In general, two types of subconjunctival bleedings were seen. One was usually in a semilunar fashion immediately outside the limbus of the eye. The other type was a stripe or macule of variable size at different positions of the sclera. The subconjunctival bleedings were not related to gestational time. In all cases, affected calves were born without assistance. Multiparous cows were more often involved in the calves with subconjunctival bleedings. Two calves examined haematologically did not show signs of anemia or thrombocytopenia. Conclusions: Subconjunctival bleedings in neonatal calves appear not to be incidental findings. Main causes or associated conditions of subconjunctival bleedings were not found.