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1.
PLoS One ; 16(6): e0253396, 2021.
Article in English | MEDLINE | ID: mdl-34133462

ABSTRACT

Livestock and companion animal health have a direct impact on human health. Research on clinical laboratory technology for veterinary medicine is as important as that on human laboratory technology. Reagents and analysis equipment for human medical laboratory tests are often used in veterinary medicine. Medical laboratories in Japan utilize the Japan Society of Clinical Chemistry (JSCC) method for blood alkaline phosphatase (ALP) analysis. The International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) method is used worldwide for ALP catalytic concentration measurement. When the IFCC method is used, human blood ALP activity is approximately one-third of the JSCC method's activity. The JSCC method for ALP measurement was switched to the IFCC method in medical laboratories in Japan in April 2020 for global standardization purpose. It is uncertain whether conventional JSCC method reagents will continue to be supplied. In veterinary medicine, the relationship between the JSCC and IFCC methods in terms of ALP measurement is almost unclear. This study investigated the regression between JSCC and IFCC methods measuring ALP in bovine, canine, feline, and human. The regression formulas for bovine, canine, feline, and human ALP values using the conventional JSCC (x) and IFCC (y) methods are y = 0.379x + 0.124, y = 0.289x + 8.291, y = 0.358x + 0.432, and y = 0.337x + 2.959, respectively. These results suggested that the IFCC method measurement could be estimated by approximately one-third of the JSCC method measurement in animal species such as bovine, canine, and feline. By applying the conversion factors proposed in this study, a very good correlation could be obtained between the two methods for each animal.


Subject(s)
Alkaline Phosphatase/blood , Animals , Cats , Cattle , Chemistry, Clinical/methods , Chemistry, Clinical/standards , Dogs , Humans , Regression Analysis , Societies, Medical/standards , Species Specificity
2.
Vet Sci ; 8(1)2021 Jan 02.
Article in English | MEDLINE | ID: mdl-33401651

ABSTRACT

A three-year-old male Pug presented with a three-year history of urolithiasis and repeated urethral obstruction. Biochemical analysis, ultrasonography, and retrograde urethrocystography revealed probable portosystemic shunt and incomplete urethral obstruction due to uric acid ammonium calculi. Enhanced computed tomography (CT) revealed portosystemic shunt and proliferation of the osseous tissue of the os penis, which was surgically removed. Histopathologically, the excised osseous tissue comprised bland lamellar bone without atypia or inflammation. Hyperplasia of the os penis was diagnosed based on the image findings and histopathology. The dysuria improved postoperatively. This is the first report of dysuria associated with non-neoplastic bone hyperplasia of the os penis in a dog. Careful evaluation of the os penis by CT is needed for accurate diagnosis in case of repeated penile urethral obstruction.

3.
J Vet Med Sci ; 82(10): 1523-1528, 2020 Oct 30.
Article in English | MEDLINE | ID: mdl-32908039

ABSTRACT

The Japan Society of Clinical Chemistry reference method (JSCC method) is used to measure alkaline phosphatase (ALP) activity only in Japan. Other countries use the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) reference method to measure ALP activity. Since April 2020, human medical institutions in Japan have been gradually switching to the IFCC method. However, it is unclear whether the supply of reagents required for the JSCC method will be steady in the future. Additionally, the comparison of the performances and accuracies of these two methods for measuring ALP values remains uncertain in several animal species. In this investigation, we measured canine ALP activity using both methods and developed a formula to interconvert the two resulting values. The regression formula for ALP values measured using the modified JSCC (x) and IFCC (y) methods was determined as log10 y=0.960 log10 x-0.395 (r=0.997). However, the correlation between values based on JSCC and IFCC methods can change depending on the composition of ALP isozymes. Therefore, the developed formula can currently serve as a provisional strategy in calculating ALP levels. Nevertheless, this formula might avoid confusion in the clinical field during the transition from the JSCC to the IFCC method when both measurement values co-exist.


Subject(s)
Alkaline Phosphatase/blood , Chemistry, Clinical/methods , Animals , Dogs , Female , Japan , Male , Reference Standards , Reference Values , Regression Analysis
4.
J Equine Sci ; 30(3): 69-73, 2019 Sep.
Article in English | MEDLINE | ID: mdl-31592225

ABSTRACT

The Noma horse is a Japanese breed from the Noma region of Imabari City, Ehime Prefecture. To obtain reference hematological and biochemical values, we performed examinations in 39 clinically healthy, mature Noma horses managed at the Imabari public ranch. Hematological and biochemical results of Noma horses were close to the normal ranges of horses in the U.S.A. The erythrocyte parameters and hepatobiliary enzyme levels in Noma and Kiso horses were lower than those in Japanese racehorses. Noma horses showed higher erythrocyte parameters and triglyceride concentrations and a lower creatinine concentration compared with those in Kiso horses. These data represent the first report of reference values for Noma horses and may be useful to improve their management.

5.
J Vet Med Sci ; 81(12): 1713-1721, 2019 Dec 18.
Article in English | MEDLINE | ID: mdl-31611484

ABSTRACT

Hypercoagulability is a common paraneoplastic complication in dogs with various malignant tumors. Importantly, tissue factor procoagulant activity (TF-PCA) induced by TF-bearing microparticles (TF-MPs) is associated with hypercoagulability in human patients with cancer. However, TF-PCA in tumor cells and the association between circulating TF-MPs and hypercoagulability in dogs with malignant tumors remain poorly understood. Therefore, the present study was conducted to evaluate the TF-PCA in various types of canine tumor cell lines and plasma in dogs with malignant tumors. Mammary gland tumor, hemangiosarcoma, and malignant melanoma cell lines, but not lymphoma cell lines, expressed TF on their surfaces and showed cellular surface and MP-associated TF-PCA. The plasma TF-PCA was elevated in some dogs that naturally developed such tumors. No significant difference was observed in plasma TF-PCA between the disseminated intravascular coagulation (DIC) group (median: 43.40; range: 3.47-85.19; n=5) and non-DIC group (median: 7.73; range: 1.70-16.13; n=12). However, plasma TF-PCA was remarkably elevated in three of five dogs with DIC. To the best of our knowledge, this is the first study to evaluate plasma TF-PCA in dogs with malignant tumors. Further studies must be conducted to determine the cellular origin of TF-MPs and the efficacy of plasma TF-PCA as a biomarker of DIC in dogs with malignant tumors.


Subject(s)
Cell-Derived Microparticles/chemistry , Dog Diseases/blood , Neoplasms/veterinary , Thromboplastin/metabolism , Animals , Cell Line, Tumor , Cell-Derived Microparticles/metabolism , Dog Diseases/pathology , Dogs , Female , Flow Cytometry/veterinary , Hemangiosarcoma/pathology , Hemangiosarcoma/veterinary , Lymphoma/pathology , Lymphoma/veterinary , Mammary Neoplasms, Animal/pathology , Melanoma/pathology , Melanoma/veterinary , Neoplasms/blood , Neoplasms/metabolism
6.
J Vet Med Sci ; 79(7): 1146-1150, 2017 Jul 07.
Article in English | MEDLINE | ID: mdl-28529270

ABSTRACT

A 16-year-old spayed female American Shorthair cat was presented with lethargy, anorexia, and wamble. Physical and blood examination did not reveal any remarkable findings. Abdominal ultrasonography identified the presence of a localized anechoic structure with a thick wall in contact with the small intestine and adjacent to the liver. Ultrasound-guided fine-needle aspiration of the structure revealed fluid containing numerous cocci and neutrophils. Two days after antibiotic treatment, exploratory laparotomy was performed and the content of the structure was removed before multiple lavages. The pathological and bacteriological examination results supported a confirmatory diagnosis of pancreatic abscess due to Staphylococcus aureus infection, making this the first such report in a cat. The cat remained healthy thereafter with no disease recurrence.


Subject(s)
Abscess/veterinary , Cat Diseases/microbiology , Pancreatic Diseases/veterinary , Staphylococcal Infections/veterinary , Abscess/diagnosis , Abscess/diagnostic imaging , Abscess/microbiology , Animals , Cat Diseases/diagnosis , Cat Diseases/diagnostic imaging , Cats , Female , Pancreatic Diseases/diagnosis , Pancreatic Diseases/diagnostic imaging , Pancreatic Diseases/microbiology , Staphylococcal Infections/diagnosis , Staphylococcal Infections/diagnostic imaging , Ultrasonography/veterinary
7.
J Vet Med Sci ; 78(10): 1611-1614, 2016 Nov 01.
Article in English | MEDLINE | ID: mdl-27320967

ABSTRACT

A 2-year-old female beagle was referred to our hospital for evaluation of anemia. Laboratory tests, including bone marrow cytology, revealed non-regenerative immune-mediated anemia (NRIMA). Although initial immunosuppressive multi-drug therapy was not effective, additional administration of danazol was successful in treating the anemia. However, hepatocellular carcinoma (HCC) developed about 20 months after the administration of danazol. In humans, several cases of development of HCC after the administration of danazol have been reported. The present report describes a case of HCC development in a dog after chronic administration of danazol in addition to other immunosuppressive drugs.


Subject(s)
Carcinoma, Hepatocellular/veterinary , Danazol/adverse effects , Dog Diseases/chemically induced , Immunosuppressive Agents/adverse effects , Liver Neoplasms/veterinary , Anemia/drug therapy , Anemia/immunology , Anemia/veterinary , Animals , Carcinoma, Hepatocellular/chemically induced , Carcinoma, Hepatocellular/diagnostic imaging , Dog Diseases/diagnostic imaging , Dogs , Female , Liver Neoplasms/chemically induced , Tomography, X-Ray Computed/veterinary
8.
J Vet Med Sci ; 78(3): 513-5, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26596464

ABSTRACT

Immunoglobulin (Ig) A nephropathy is a rare form of canine glomerular disease. This report describes a case of canine IgA nephropathy showing characteristics typical of human IgA nephropathy. An 8-year-old, spayed female Miniature Dachshund showed persistent severe proteinuria without azotemia. She was receiving long-term glucocorticoid therapy due to chronic gastritis and an intra-abdominal suture granuloma. A renal biopsy demonstrated mesangial proliferative glomerulonephritis with predominantly mesangial IgA deposition and electron-dense deposits in the paramesangium. These findings closely resembled those of human IgA nephropathy. Glucocorticoid treatment was discontinued, and the angiotensin-converting enzyme inhibitor enalapril was administrated as an antiproteinuric agent. The proteinuria subsequently went into remission, and the patient has maintained good condition without recurrence.


Subject(s)
Dog Diseases/pathology , Glomerulonephritis, IGA/veterinary , Animals , Dog Diseases/urine , Dogs , Female , Glomerulonephritis, IGA/pathology , Glomerulonephritis, IGA/urine , Proteinuria/veterinary
9.
J Vet Med Sci ; 78(4): 691-5, 2016 May 03.
Article in English | MEDLINE | ID: mdl-26638898

ABSTRACT

A 10-year-old female spayed mixed breed cat with a subcutaneous mass on the right hind limb was revealed with bimodal monoclonal gammopathy composed of IgA by immunoelectrophoresis and immunofixation. Approximately 1 month after referral, the cat died due to renal failure. Postmortem immunohistopathologic evaluation of the subcutaneous mass revealed neoplastic cell proliferation of plasma cells and giant myeloma cells. Neoplastic cells were also present in the liver and spleen. These results led to the diagnosis of a rare case of feline myeloma-related disorders with extramedullary plasmacytoma infiltrating in multiple locations. This report emphasizes the necessity to accumulate cases with similar clinicopathologic findings in the future.


Subject(s)
Cat Diseases/immunology , Multiple Myeloma/veterinary , Paraproteinemias/veterinary , Animals , Cats , Female , Immunoglobulin A , Multiple Myeloma/complications , Multiple Myeloma/immunology , Paraproteinemias/etiology , Paraproteinemias/immunology
10.
J Vet Med Sci ; 77(11): 1405-12, 2015 Nov.
Article in English | MEDLINE | ID: mdl-26050843

ABSTRACT

Hypoxic conditions in various cancers are believed to relate with their malignancy, and hypoxia inducible factor-1α (HIF-1α) has been shown to be a major regulator of the response to low oxygen. In this study, we examined HIF-1α expression in canine lymphoma using cell lines and clinical samples and found that these cells expressed HIF-1α. Moreover, the HIF-1α inhibitors, echinomycin, YC-1 and 2-methoxyestradiol, suppressed the proliferation of canine lymphoma cell lines. In a xenograft model using NOD/scid mice, echinomycin treatment resulted in a dose-dependent regression of the tumor. Our results suggest that HIF-1α contributes to the proliferation and/or survival of canine lymphoma cells. Therefore, HIF-1α inhibitors may be potential agents to treat canine lymphoma.


Subject(s)
Echinomycin/pharmacology , Hypoxia-Inducible Factor 1, alpha Subunit/antagonists & inhibitors , Hypoxia-Inducible Factor 1, alpha Subunit/metabolism , Lymphoma/veterinary , Animals , Cell Line, Tumor , Dog Diseases , Dogs , Gene Expression Regulation, Neoplastic/drug effects , Humans , Hypoxia-Inducible Factor 1, alpha Subunit/genetics , Lymphoma/metabolism , Mice , Neoplasms, Experimental/drug therapy
11.
J Vet Med Sci ; 77(11): 1507-10, 2015 Nov.
Article in English | MEDLINE | ID: mdl-26062568

ABSTRACT

A 6-year-old spayed female Jack Russell Terrier presented with a 1-month history of lethargy, anorexia, vomiting and weight loss. The dog was fed beef and chicken jerky treats daily in addition to a commercial diet. Laboratory tests revealed azotemia, hypokalemia, hyperchloremia, metabolic acidosis and glucosuria with normoglycemia. Urine amino acid analysis showed significant amino acid loss into the urine. Thus, Fanconi syndrome was diagnosed, and based on the case history and extensive diagnostic testing, excessive consumption of jerky treats was strongly suspected as the cause. Glucosuria resolved 7 days after the withdrawal of jerky treats and fluid therapy. Aminoaciduria was substantially, but not completely, improved 3 months after diagnosis. Mild azotemia remained, suggesting chronic renal disease. To the best of our knowledge, this is the first reported case of Fanconi syndrome following the consumption of jerky treats in Japan.


Subject(s)
Animal Feed/adverse effects , Dog Diseases/chemically induced , Fanconi Syndrome/veterinary , Meat , Animals , Cattle , Chickens , Dogs , Fanconi Syndrome/chemically induced , Female
12.
J Vet Med Sci ; 75(7): 985-9, 2013 Jul 31.
Article in English | MEDLINE | ID: mdl-23449464

ABSTRACT

This epidemiological survey was conducted to determine the prevalence of Hepatozoon, Babesia and Theileria infection in the Iriomote cat (IC) and the Tsushima leopard cat (TLC). Blood samples from 43 ICs and 14 TLCs were collected between November 2002 and January 2012. Polymerase chain reaction and DNA sequencing analyses detected a Hepatozoon felis infection prevalence of 72.0% (31/43 cats) and 100% (14/14 cats) in ICs and TLCs, respectively. The degree of Hepatozoon parasitemia observed on blood smears ranged from 0.1 to 4.7%. However, no cases had obvious clinical signs of hepatozoonosis. Neither Babesia- nor Theileria-infected wildcats were detected in this study.


Subject(s)
Eucoccidiida , Felidae , Tick-Borne Diseases/epidemiology , Tick-Borne Diseases/veterinary , Animals , Babesia , Base Sequence , DNA Primers/genetics , Female , Japan/epidemiology , Male , Molecular Sequence Data , Polymerase Chain Reaction/veterinary , Prevalence , Sequence Analysis, DNA/veterinary , Species Specificity , Theileria
13.
J Vet Med Sci ; 74(12): 1531-7, 2012 Dec.
Article in English | MEDLINE | ID: mdl-22785566

ABSTRACT

An epidemiological survey of Iriomote cats (Prionailurus bengalensis iriomotensis) was conducted to understand the prevalence and molecular characteristics of hemotropic mycoplasma (hemoplasma). A series of ecological surveys of Iriomote cats were performed between November 2003 and September 2010. During this period, 31 Iriomote cats were captured or found, and 39 blood samples were collected. Polymerase chain reaction screening for hemoplasmas and BLAST searches revealed that 4 of the 31 cats were positive for hemoplasma infection (n=3, Mycoplasma haemofelis [Mhf]; n=1, 'Candidatus M. turicensis' [CMt]). The 4 infected cats were captured or found in the northern area of the island of Iriomote. Phylogenetic analyses revealed close relationships between Mhf and CMt isolated from Iriomote cats compared with those from domestic cats and other wild felids. In our study, we identified two species of hemoplasma in Iriomote cats. The number and location of the hemoplasma-positive cats appeared to be limited; however, continuous surveillance of hemoplasma infection in Iriomote cats is necessary.


Subject(s)
Endangered Species , Felidae/microbiology , Mycoplasma Infections/epidemiology , Mycoplasma Infections/veterinary , Mycoplasma/genetics , Phylogeny , Animals , Base Sequence , Cluster Analysis , Computational Biology , DNA Primers/genetics , Female , Japan/epidemiology , Male , Molecular Sequence Data , Mycoplasma Infections/blood , Polymerase Chain Reaction/veterinary , Prevalence , Sequence Analysis, DNA/veterinary , Species Specificity
14.
J Vet Med Sci ; 74(10): 1341-4, 2012 Oct.
Article in English | MEDLINE | ID: mdl-22672842

ABSTRACT

In this study, we conducted a survey of the cytochrome b (cytb) gene of Babesia gibsoni (B. gibsoni) isolated from clinical cases to determine the prevalence of potential atovaquone (ATV)-resistant variants. Ninety-two blood samples were collected from naturally B. gibsoni infected dogs. The cytb nucleotide sequence was determined by direct sequencing. Twelve non-synonymous amino acid substitutions were identified in cytb. The principal ATV-resistant substitution, M121I, was detected in three cases. This survey determined that potentially ATV-resistant B. gibsoni strains are present in dogs in Japan.


Subject(s)
Babesia/isolation & purification , Babesiosis/veterinary , Cytochromes b/genetics , Dog Diseases/epidemiology , Dog Diseases/parasitology , Animals , Atovaquone/therapeutic use , Babesia/enzymology , Babesia/genetics , Babesiosis/drug therapy , Babesiosis/epidemiology , Babesiosis/parasitology , DNA, Protozoan/chemistry , DNA, Protozoan/genetics , Dog Diseases/drug therapy , Dogs , Enzyme Inhibitors/therapeutic use , Japan/epidemiology , Point Mutation , Polymerase Chain Reaction/veterinary , RNA, Ribosomal, 18S/chemistry , RNA, Ribosomal, 18S/genetics
15.
J Vet Med Sci ; 73(10): 1381-4, 2011 Oct.
Article in English | MEDLINE | ID: mdl-21685717

ABSTRACT

We herein present clinical findings of an Iriomote cat with Hepatozoon felis parasitemia. A male Iriomote cat was captured for ecological analyses three times from January 2010 to January 2011. Although this cat did not show any hematological abnormalities at the time of the first capture, H. felis parasitemia and increased serum creatine kinase levels were detected at the second and third captures. H. felis infection was confirmed by polymerase chain reaction, and amplified 18S ribosomal RNA gene fragments were 100% identical to those of H. felis in leopard cats in Korea. Although the virulence of H. felis in this cat was suggested to be low, this is the first report of an H. felis-infected Iriomote cat with parasitemia.


Subject(s)
Coccidiosis/veterinary , Eucoccidiida/isolation & purification , Felidae/parasitology , Parasitemia/veterinary , Animals , Base Sequence , Coccidiosis/diagnosis , Eucoccidiida/genetics , Felidae/genetics , Genes, rRNA , Male , Parasitemia/diagnosis , Phylogeny
16.
J Vet Med Sci ; 73(10): 1389-93, 2011 Oct.
Article in English | MEDLINE | ID: mdl-21697643

ABSTRACT

A 4-year-old, intact male Shiba dog was referred to Yamaguchi University Animal Medical Center, Yamaguchi, Japan, for the following complaints: anorexia, lethargy, intermittent fever, gingival bleeding and abdominal purpura. The dog presented with persistent neutropenia. Histopathological examination of a bone marrow sample revealed round to oval structures that resembled Hepatozoon micromerozoites and formed a "wheel-spoke" pattern. Furthermore, mature neutrophils were observed around these structures. PCR and sequencing using bone marrow aspirate confirmed Hepatozoon canis (H. canis) infection. These findings suggest that the neutropenia observed in this case was associated with osteomyelitis due to H. canis infection. This is the first report of neutropenia associated with H. canis infection. H. canis infection can be included in the differential diagnosis in canine cases of neutropenia in areas where the disease is endemic.


Subject(s)
Coccidiosis/veterinary , Dog Diseases/diagnosis , Eucoccidiida/isolation & purification , Neutropenia/veterinary , Osteomyelitis/veterinary , Animals , Coccidiosis/complications , Coccidiosis/diagnosis , Dogs , Male , Neutropenia/etiology , Osteomyelitis/complications , Osteomyelitis/diagnosis , Osteomyelitis/parasitology
17.
J Vet Med Sci ; 73(1): 107-11, 2011 Jan.
Article in English | MEDLINE | ID: mdl-20736516

ABSTRACT

Prekallikrein (PK) deficiency is an uncommon disorder in dogs. In this report, we describe a case of a dog that was referred for neurological defects and had a prolonged activated partial thromboplastin time (aPTT) and normal prothrombin time (PT) with no hemostatic defects. By using human PK-deficient plasma, the dog was diagnosed to have PK deficiency. The nucleotide sequence of normal canine PK cDNA was determined and compared with the genomic sequences of PK in the affected dog. The comparison revealed that the dog had a point mutation in exon 8 that leads to an amino acid substitution in the fourth apple domain of PK. This is the first report showing a point mutation of PK in a dog with PK deficiency.


Subject(s)
Dog Diseases/blood , Hemostatic Disorders/veterinary , Prekallikrein/deficiency , Amino Acid Sequence , Animals , Base Sequence , DNA, Complementary/genetics , Dogs , Hemostatic Disorders/genetics , Hemostatic Disorders/metabolism , Male , Molecular Sequence Data , Partial Thromboplastin Time/veterinary , Point Mutation , Prekallikrein/genetics , Prekallikrein/metabolism
18.
J Vet Med Sci ; 72(3): 363-7, 2010 Mar.
Article in English | MEDLINE | ID: mdl-19959883

ABSTRACT

We performed continuous renal replacement therapy (CRRT) in clinically healthy dogs (n=7) to evaluate the utility of nafamostat mesilate (NM) as an anticoagulant. In 3 of the 7 dogs, CRRT had to be discontinued before the target duration due to coagulation in the extracorporeal circuit, into which NM was administered constantly at the rate of 2.0-6.0 mg/kg per hour. The rate of administration of NM was greater than the recommended dose of NM in humans. Further, all the dogs suffered vomiting during CRRT with NM infusion. We therefore recommend that NM is not used as an anticoagulant during CRRT in dogs.


Subject(s)
Anticoagulants/therapeutic use , Guanidines/adverse effects , Renal Replacement Therapy/methods , Animals , Benzamidines , Blood Urea Nitrogen , Calcium/blood , Creatinine/blood , Dogs , Hemofiltration/methods , Hemofiltration/veterinary , Potassium/blood , Renal Dialysis/veterinary , Serum Albumin/drug effects , Serum Albumin/metabolism , Sodium/blood
19.
J Vet Med Sci ; 72(4): 493-7, 2010 Apr.
Article in English | MEDLINE | ID: mdl-20009350

ABSTRACT

We performed continuous renal replacement therapy (CRRT) on clinically healthy dogs to evaluate the effects of CRRT on hemodynamics. Heart rate, arterial blood pressure, and central venous pressure of the dogs (n=6) were recorded during the procedure, which was performed under general anesthesia. Throughout the CRRT, heart rate and arterial blood pressure were stable. Central venous pressure increased after CRRT termination but returned to the basal level within 30 min. In this study, hemodynamic alterations, including hypotension, hypertension, and arrhythmias, were not observed during CRRT. These observations suggest that the CRRT protocol used in the present study can be safely applied to clinical cases with acute renal failure.


Subject(s)
Hemodiafiltration/veterinary , Hemodynamics/physiology , Renal Replacement Therapy/veterinary , Anesthesia, General/veterinary , Animals , Blood Pressure , Central Venous Pressure , Diastole , Dogs , Female , Heart Rate , Hemodiafiltration/methods , Reference Values , Renal Replacement Therapy/methods , Systole
20.
J Vet Med Sci ; 71(10): 1387-91, 2009 Oct.
Article in English | MEDLINE | ID: mdl-19887748

ABSTRACT

A 6-month-old miniature Schnauzer presented with hypernatremia and clinical signs of vomiting, diarrhea, inappetence, and lethargy. The dog did not consume water on its own. Hypernatremia and the related clinical signs were resolved by fluid administration. Endocrinological investigations and urinalysis excluded the possibility of diabetes insipidus and hyperaldosteronism. Therefore, the dog was diagnosed with hypodipsic hypernatremia. Magnetic resonance imaging revealed dysgenesis of the corpus callosum and other forebrain structures. On the basis of these findings, congenital brain malformation associated with failure of the osmoreceptor system was suspected.


Subject(s)
Brain Diseases/veterinary , Dog Diseases/pathology , Drinking/physiology , Hypernatremia/veterinary , Magnetic Resonance Imaging/veterinary , Animals , Brain/pathology , Brain Diseases/congenital , Dogs , Female , Hypernatremia/congenital , Hypernatremia/pathology
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