scholarly journals Comparison of volume of the forebrain, subarachnoid space and lateral ventricles between dogs with idiopathic epilepsy and controls using a stereological approach: Cavalieri’s principle

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Fraje Watson ◽  
A. Augusto Coppi ◽  
Holger A. Volk ◽  
Rowena M. A. Packer ◽  
Anna Tauro ◽  
...  
Keyword(s):  
Status Epilepticus ◽  
Subarachnoid Space ◽  
Idiopathic Epilepsy ◽  
German Shepherd ◽  
Lateral Ventricles ◽  
German Shepherd Dog ◽  
Significant Difference ◽  
Mri Scans ◽  
Lv Volume ◽  
Cavalieri’S Principle

Abstract Background Canine idiopathic epilepsy (IE) is the most common chronic neurological brain disease in dogs, yet it can only be diagnosed by exclusion of all other potential causes. In people, epilepsy has been associated with a reduction in brain volume. The objective was to estimate the volume of the forebrain (FB), subarachnoid space (SAS) and lateral ventricles (LV) in dogs with IE compared to controls using Cavalieri’s principle. MRI scans of case and control dogs were identified from two neurology referral hospital databases. Eight breeds with increased odds of having IE were included: Golden Retriever, Labrador Retriever, Cocker Spaniel, Border terrier, German Shepherd dog, Parson Jack Russell terrier, Boxer, and Border Collie. Five dogs of each breed with IE and up to five controls were systematically and uniformly randomly sampled (SURS). The volume of the FB, SAS and LV were estimated from MRI scans by one blinded observer using Cavalieri’s principle. Results One hundred-two dogs were identified; 56 were diagnosed with IE and 46 were controls. There was no statistically significant difference in FB, SAS and LV volume between dogs with IE and controls. Dogs with a history of status epilepticus had significantly larger FB than those without (p = 0.05). There was a border-line trend for LV volume to increase with increasing length of seizure history in the IE group (p = 0.055). Conclusion The volumes of the FB, SAS and LV are not different between dogs with IE and controls, so IE remains a diagnosis of exclusion with no specific neuroanatomical biomarkers identified. This is the first time FB and SAS volume has been compared in dogs with IE. Unfortunately, we have shown that the results reporting significantly larger FBs in dogs with status epilepticus and LV volume increase with length of seizure history were likely confounded by breed and should be interpreted cautiously. Whilst these associations are interesting and clinically relevant, further investigation with breed-specific or larger, breed-diverse populations are required to permit strong conclusions. The Cavalieri principle provided an effective estimation of FB, SAS and LV volumes on MRI, but may be too time-intensive for use in clinical practice.

Retrospective clinical comparison of idiopathic versus symptomatic epilepsy in 240 dogs with seizures

2008 ◽  
Vol 56 (4) ◽  
pp. 471-483 ◽  
Author(s):  
Ákos Pákozdy ◽  
Michael Leschnik ◽  
Alexander Tichy ◽  
Johann Thalhammer
Keyword(s):  
Status Epilepticus ◽  
Histopathological Examination ◽  
Morphological Changes ◽  
Serum Biochemistry ◽  
Idiopathic Epilepsy ◽  
Neurological Deficits ◽  
Partial Seizures ◽  
Significant Difference ◽  
Symptomatic Epilepsy ◽  
Cluster Seizures

In the present study, 240 cases of dogs with seizures were analysed retrospectively. The aim was to examine the underlying aetiology and to compare primary or idiopathic epilepsy (IE) with symptomatic epilepsy (SE) concerning signalment, history, ictal pattern, clinical and neurological findings. The diagnosis of symptomatic epilepsy was based on confirmed pathological changes in haematology, serum biochemistry, cerebrospinal fluid (CSF) analysis and morphological changes of the brain by CT/MRI or histopathological examination. Seizure aetiologies were classified as idiopathic epilepsy (IE, n = 115) and symptomatic epilepsy (SE, n = 125). Symptomatic epilepsy was mainly caused by intracranial neoplasia (39) and encephalitis (23). The following variables showed significant difference between the IE and SE group: age, body weight, presence of partial seizures, cluster seizures, status epilepticus, ictal vocalisation and neurological deficits. In 48% of the cases, seizures were found to be due to IE, while 16% were due to intracranial neoplasia and 10% to encephalitis. Status epilepticus, cluster seizures, partial seizures, vocalisation during seizure and impaired neurological status were more readily seen with symptomatic epilepsy. If the first seizure occurred between one and five years of age or the seizures occurred during resting condition, the diagnosis was more likely IE than SE.

scholarly journals Czechoslovakian Wolfdog Genomic Divergence from Its Ancestors Canis lupus, German Shepherd Dog, and Different Sheepdogs of European Origin

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 832
Author(s):  
Nina Moravčíková ◽  
Radovan Kasarda ◽  
Radoslav Židek ◽  
Luboš Vostrý ◽  
Hana Vostrá-Vydrová ◽  
...  
Keyword(s):  
Demographic History ◽  
Genome Structure ◽  
Principal Component ◽  
Genetic Distances ◽  
Nucleotide Polymorphisms ◽  
German Shepherd ◽  
German Shepherd Dog ◽  
Genome Wide ◽  
Scale Population ◽  
History Effect

This study focused on the genomic differences between the Czechoslovakian wolfdog (CWD) and its ancestors, the Grey wolf (GW) and German Shepherd dog. The Saarloos wolfdog and Belgian Shepherd dog were also included to study the level of GW genetics retained in the genome of domesticated breeds. The dataset consisted of 131 animals and 143,593 single nucleotide polymorphisms (SNPs). The effects of demographic history on the overall genome structure were determined by screening the distribution of the homozygous segments. The genetic variance distributed within and between groups was quantified by genetic distances, the FST index, and discriminant analysis of principal components. Fine-scale population stratification due to specific morphological and behavioural traits was assessed by principal component and factorial analyses. In the CWD, a demographic history effect was manifested mainly in a high genome-wide proportion of short homozygous segments corresponding to a historical load of inbreeding derived from founders. The observed proportion of long homozygous segments indicated that the inbreeding events shaped the CWD genome relatively recently compared to other groups. Even if there was a significant increase in genetic similarity among wolf-like breeds, they were genetically separated from each other. Moreover, this study showed that the CWD genome carries private alleles that are not found in either wolves or other dog breeds analysed in this study.

scholarly journals Disseminated Scytalidium infection in a German shepherd dog

2015 ◽  
Vol 7 ◽  
pp. 20-22 ◽  
Author(s):  
Anna E. Dunlap ◽  
Amy K. Swinford ◽  
Katherine L. Wells
Keyword(s):  
German Shepherd ◽  
German Shepherd Dog

Diffuse annular fusiform adenocarcinoma in a dog

2000 ◽  
Vol 36 (2) ◽  
pp. 169-173 ◽  
Author(s):  
MR Prater ◽  
B Flatland ◽  
SJ Newman ◽  
DP Sponenberg ◽  
J Chao
Keyword(s):  
Large Bowel ◽  
Unusual Case ◽  
Clinical Signs ◽  
Postmortem Examination ◽  
Watery Diarrhea ◽  
Colonic Adenocarcinoma ◽  
German Shepherd ◽  
Regional Lymph Nodes ◽  
German Shepherd Dog ◽  
Neoplastic Lesion

Canine colonic intestinal adenocarcinoma typically presents as rectal polypoid or annular stenotic masses causing clinical signs consistent with large bowel disease. This report discusses an unusual case of intestinal adenocarcinoma in an 11-year-old, neutered male German shepherd dog presented for evaluation of anorexia, profuse watery diarrhea, and weight loss. In this dog, colonic adenocarcinoma diffusely infiltrated the entire large bowel and caused an annular fusiform lesion, as confirmed by endoscopic biopsies and postmortem examination. Other unique features included a paucity of desmoplasia associated with the neoplastic lesion and widespread metastasis to regional lymph nodes, lung, and prostate.

Hair Magnesium content and its relation to Serum Magnesium level in children with Idiopathic Epilepsy

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Hamed Mahmoud Shatla ◽  
Mariam Fathy Abdel Maksoud ◽  
Raghda Mohamed Hesham Zaitoun ◽  
Alaa Rabie Abdel Baset Mahmoud
Keyword(s):  
Serum Magnesium ◽  
Serum Levels ◽  
Magnesium Content ◽  
Magnesium Level ◽  
Idiopathic Epilepsy ◽  
Age And Gender ◽  
Control Subjects ◽  
Significant Difference ◽  
And Gender ◽  
Patients With Epilepsy

Abstract Objective To measure the level of hair Mg, as well as its level in serum, in patients with epilepsy and compare them to the levels found in non-epileptic age and gender matched children, and to explore any potential correlation between either serum or hair level of magnesium and seizure characteristics in children with idiopathic epilepsy. Methods An observational cross-sectional study including 50 children with idiopathic epilepsy and 100 non-epileptic age and gender matched control subjects. Cases were subjected to full history taking, examination and measurements of serum and hair levels of magnesium, control subjects only had their serum and hair level of magnesium measured as for the cases. Results The mean serum magnesium was 29.11 ± 13.42 ug/ml for cases and 27.67 ± 7.24 ug/ml for controls and the median hair level of magnesium was 42.22 ug/g with IQR of 25.9 - 56.82 for cases and 38.6 ug/g with IQR of 25.21 - 61.25 for controls. No statistically significant difference was observed between both groups as regards either serum or hair magnesium levels. No statistically significant correlation was observed between either hair or serum levels of magnesium and seizure characteristics though the correlations were nearing statistical significance for the hair magnesium content. Conclusion Hair magnesium level may be better correlated to seizure characteristics and control than serum levels in patients with epilepsy.

scholarly journals Transient hyperammonaemia in an adult German shepherd dog : case report

1997 ◽  
Vol 68 (2) ◽  
Author(s):  
R.G. Lobetti ◽  
D.B. Miller ◽  
T. Dippenaar
Keyword(s):  
Case Report ◽  
Liver Disease ◽  
Urinary Tract ◽  
Drug Therapy ◽  
Urea Cycle ◽  
Urinary Tract Obstruction ◽  
German Shepherd ◽  
Cycle Enzyme ◽  
German Shepherd Dog ◽  
Urea Cycle Enzyme

A 3-year-old male German shepherd dog was presented with severe generalised seizures. The dog was protein-intolerant and showed severe hyperammonaemia on ammonia stimulation. The hyperammonaemic state was present for at least 6 weeks and then spontaneously resolved. No obvious cause (liver disease, portocaval shunts, urea cycle enzyme deficiencies, drug therapy or urinary tract obstruction) could be identified. It is possible that this dog had a variation of transient hyperammonaemic syndrome, described in man and recently in a juvenile Irish wolfhound, that extended into adulthood.

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