Color-dilution alopecia is a relatively uncommon hereditary skin disease seen in "Blue" and other color-diluted dogs. This syndrome is associated with a color-dilution gene. The initial clinical signs are the gradual onset of a dry, dull and poor hair coat quality. Hair shafts and hair regrowth are poor, and follicular papules may develop and progress to frank comedones. Hair loss and comedo formation are usually most severe on the trunk, especially color-diluted area on the skin. Six cases of color-dilution alopecia are reported in 3 months to 10 years old dogs. The breeds of dogs are blue Doberman Pinscher, Miniature Pinscher, Dachshund, and Schnauzer. Grossly, extensive partial hair loss was seen on the skin. Histopathologically, the epidermis is relatively normal but may be hyperplastic. Hair follicles are characterized by atrophy and distortion. Heavily clumped melanin is present in the epidermis, dermis and hair follicles.
Alopecia/genetics/*veterinary ; Animals ; Dog Diseases/*genetics ; Dogs ; Female ; Hair Color/*genetics ; Male ; Skin/pathology

The number of human rabies cases acquired from dog bites constitutes a high proportion of the total rabies cases in China, although the number of human rabies cases has gradually decreased in recent years. The pivotal role of dogs in the spread of rabies indicates that controlling and preventing canine rabies could be a key step in eradicating human rabies in China. The primary aims of this review are to discuss the properties and pathogenesis of the rabies virus, the clinical signs and diagnosis of canine rabies, threshold host density and vaccination of dogs, and the prevention and control of canine rabies in China.
Animals ; Dog Diseases ; epidemiology ; prevention & control ; virology ; Dogs ; Rabies ; epidemiology ; prevention & control ; veterinary ; virology ; Rabies Vaccines ; immunology ; Rabies virus ; genetics

OBJECTIVETo perform pathological observation and etiological identification of specimens collected from dairy cows, beef cattle and dogs which were suspected of rabies in Inner Mongolia in 2011, and analyze their etiological characteristics.

METHODSPathological observation was conducted on the brain specimens of three infected animals with Hematoxylin-Eosin staining, followed by confirmation using immunofluorescence and nested RT-PCR methods. Finally, phylogenetic analysis was conducted using the virus N gene sequence amplified from three specimens.

RESULTSEosinophilic and cytoplasmic inclusion bodies were seen in neuronal cells of the CNS; and rabies non-characteristic histopathological changes were also detected in the CNS. The three brain specimens were detected positive. N gene nucleotide sequence of these three isolates showed distinct sequence identity, therefore they fell into different groups in the phylogenetic analysis. N gene in the cow and dog had higher homology with that in Hebei isolate, but that in the beef cattle had higher homology with that in Mongolian lupine isolate and Russian red fox isolate.

CONCLUSIONRabies were observed in the dairy cow, beef cattle and canine in the farm in Inner Mongolia, in 2011, which led to a different etiologic characteristics of the epidemic situation.

Acetazolamide ; Animals ; Brain ; pathology ; Cattle ; Cattle Diseases ; epidemiology ; pathology ; Dog Diseases ; diagnosis ; epidemiology ; Dogs ; Mongolia ; epidemiology ; Nucleoproteins ; genetics ; Phylogeny ; Rabies ; epidemiology ; veterinary ; Rabies virus ; genetics ; Time Factors

Objective: This study aims to investigate the infection of Method: Infection of the definitive human host and intermediate fish host by Results: In 2016-2020, the average population infection rate of Hunan was 1.38%, while in Tongdao County the rate was up to 26.90%, and the highest fish infection rate was detected in Qiyang County (99.44% in the dorsal fin of Conclusion The systematically study of
Animals ; Cat Diseases/parasitology* ; Cats ; China/epidemiology* ; Clonorchiasis/veterinary* ; Clonorchis sinensis/genetics* ; Dog Diseases/parasitology* ; Dogs ; Fish Diseases/parasitology* ; Fishes ; Humans ; Incidence ; Prevalence ; Species Specificity

The canine transmissible venereal tumor (CTVT) is found mainly in dogs' sexual organs. Currently, it is widely accepted that all samples of CTVT show similar histopathological characteristics and share common genetic alterations. Despite the common genetic origin of CTVT, mutations in the P53 gene have been reported. In this study, we proposed that tumor samples can be genetically grouped using this gene. The presence of different subgroups of CTVT was determined in Mexican dogs using the TP53 gene sequence in CTVT samples. Four new polymorphisms were found and therefore, the CTVT samples were classified in five subgroups.
Animals ; Base Sequence ; Dog Diseases/*genetics ; Dogs ; Gene Expression Regulation, Neoplastic/physiology ; Molecular Sequence Data ; Mutation ; *Polymorphism, Genetic ; Tumor Suppressor Protein p53/*genetics ; Venereal Tumors, Veterinary/*genetics

The ascarids, Toxocara canis and Toxascaris leonina, are probably the most common gastrointestinal helminths encountered in dogs. In order to understand biological differences of 2 ascarids, we analyzed gene expression profiles of female adults of T. canis and T. leonina using CLC Genomics Workbench, and the results were compared with those of free-living nematode Caenorhabditis elegans. A total of 2,880 and 7,949 ESTs were collected from T. leonina and T. canis, respectively. The length of ESTs ranged from 106 to 4,637 bp with an average insert size of 820 bp. Overall, our results showed that most functional gene annotations of 2 ascarids were quite similar to each other in 3 major categories, i.e., cellular component, biological process, and molecular function. Although some different transcript expression categories were found, the distance was short and it was not enough to explain their different lifestyles. However, we found distinguished transcript differences between ascarid parasites and free-living nematodes. Understanding evolutionary genetic changes might be helpful for studies of the lifestyle and evolution of parasites.
Animals ; Dog Diseases/*parasitology ; Dogs ; Female ; *Genomics ; Molecular Sequence Annotation ; Toxascariasis/parasitology/*veterinary ; Toxascaris/*genetics/metabolism ; Toxocara canis/*genetics/metabolism ; Toxocariasis/*parasitology

Mutation of the p53 tumor suppressor gene has been related in the pathogenesis of numerous human and canine cancers, including breast cancers and mammary tumors. We have investigated exons 5-8 of the p53 gene for mutations in 20 spontaneous canine mammary tumors using polymerase chain reaction (PCR) with direct sequence analysis to evaluate the role of this gene in canine mammary tumorigenesis and analyzed to compare with other clinicopathological parameters including age, histology, stage, recurrence and death from tumor. Four missense (one case had two missense mutations) and one nonsense mutations were detected in 10 malignant lesions (40%), and two missense and one silent mutations were found in 10 benign mammary tumors (30%). Five of the missense mutations were located in highly conserved domains II, III, IV and V. After a follow-up period, four dogs showed a progression and three of these patients revealed death from mammary carcinoma with p53 mutation. These results demonstrated that the p53 gene mutations might be involved in the development of canine mammary tumors and contribute to the prognostic status in canine mammary carcinomas.
Animals ; Codon, Nonsense/genetics ; DNA, Neoplasm/chemistry/genetics ; Dog Diseases/*genetics ; Dogs ; Female ; Genes, p53/*genetics ; Mammary Neoplasms, Animal/*genetics ; Mutation, Missense/genetics ; Polymerase Chain Reaction/veterinary ; Sequence Analysis, DNA ; Survival Analysis ; Tumor Suppressor Protein p53/genetics

Nematomorpha, horsehair or Gordian worms, include about 300 freshwater species in 22 genera (Gordiida) and 5 marine species in 1 marine genus (Nectonema). They are parasitic in arthropods during their juvenile stage. In the present study, the used gordian worm was found in the feces of a dog (5-month old, male) in July 2014. Following the worm analysis using light and scanning electron microscopes, the morphological classification was re-evaluated with molecular analysis. The worm was determined to be a male worm having a bi-lobed tail and had male gonads in cross sections. It was identified as Gordius sp. (Nematomorpha: Gordiidae) based on the characteristic morphologies of cross sections and areole on the cuticle. DNA analysis on 18S rRNA partial sequence arrangements was also carried out, and the gordiid worm was assumed to be close to the genus Gordius based on a phylogenic tree analysis.
Animals ; Dog Diseases/diagnosis/*parasitology ; Dogs ; Feces/*parasitology ; Helminthiasis, Animal/diagnosis/*parasitology ; Helminths/classification/genetics/*isolation & purification ; Male ; Molecular Sequence Data ; Phylogeny

OBJECTIVETo investigate the situation of dog rabies and analyze it's relationship with human rabies.

METHODSIn Guizhou, Guangxi and Hunan provinces which suffered from rabies most heavily, one or two cities were selected respectively from regions with high-, middle-, low-incidence rate of human rabies as investigation spots where Dogs' brain specimens were collected and detected with both direct immunofluorescence assay (IFA) and RT-PCR.

RESULTSA total of 2887 specimens were collected and 66 of these were positive for IFA and RT-PCR. Therefore, the rate of positive specimens was 2.3%. However, there was not a close relationship in the incidence rate of dog rabies and human rabies.

CONCLUSIONDog's infection situation of rabies contributed to the severe epidemic of human rabies.

Animals ; Brain ; pathology ; virology ; China ; epidemiology ; Dog Diseases ; epidemiology ; virology ; Dogs ; Humans ; Incidence ; Rabies ; epidemiology ; veterinary ; virology ; Rabies virus ; genetics ; isolation & purification

Toxoplasmosis, caused by Toxoplasma gondii, is a parasitic zoonosis with worldwide distribution. The present study investigated the prevalence of T. gondii in dogs in Zhanjiang city, southern China, using both serological and molecular detection. A total of 364 serum samples and 432 liver tissue samples were collected from the slaughter house between December 2012 and January 2013 and were examined for T. gondii IgG antibody by ELISA and T. gondii DNA by semi-nested PCR based on B1 gene, respectively. The overall seroprevalence of T. gondii IgG antibody was 51.9%, and T. gondii DNA was detected in 37 of 432 (8.6%) liver tissue samples. These positive DNA samples were analyzed by PCR-RFLP at 3'- and 5'-SAG2. Only 8 samples gave the PCR-RFLP data, and they were all classified as type I, which may suggest that the T. gondii isolates from dogs in Zhanjiang city may represent type I or type I variant. This study revealed the high prevalence of T. gondii infection in dogs in Zhanjiang city, southern China. Integrated measures should be taken to prevent and control toxoplasmosis in dogs in this area for public health concern.
Animals ; Antibodies, Protozoan/blood ; China/epidemiology ; Dog Diseases/epidemiology/*parasitology ; Dogs ; Female ; Genotype ; Liver/parasitology ; Male ; Toxoplasma/classification/genetics/immunology/*isolation & purification ; Toxoplasmosis, Animal/blood/epidemiology/*parasitology