Mixed-breed Research Articles

Perfil epidemiológico das otites canina e felina em um Hospital Veterinário Universitário: um estudo retrospectivo

The objective of this work was to analyze the cases of otitis in companion animals treated at the Veterinary Hospital Jeremias Pereira da Silva / Universidade Federal do Piauí (UFPI) and the profile of antimicrobial drugs used in the treatment of these infections. A retrospective cross-sectional observational epidemiological study was carried out on the assisted animals with otitis at the Veterinary Hospital Jeremias Pereira da Silva / (UFPI), during the period from January 2015 to December 2020, through access to the registration system called “Doctorvet”, evaluating the characteristics of the patients treated, the diagnosis and therapy adopted and the clinical response to these services. Mixed breed dogs (MBDs), with bilateral presentation of this disease and the presence of comorbidities were frequent occurrences in the animals treated. Antibiotic prescriptions of aminoglycosides (Gentamicin and Neomycin) were the most used, in formulations associated with other substances, such as antifungals and anti-inflammatories, with the commercial presentation Aurivet being the most prescribed and the one that received the greatest number of favorable reports. However, the use of other different therapeutic protocols was evidenced without justification for this choice. Establishing therapeutic protocols to be followed by veterinary clinicians, when treating otitis, and monitoring the success or failure of these prescriptions, will contribute to reveal much more than the epidemiological profile of the etiologic agents, but the adequate use of antimicrobial agents, controlling the increase in rates of antibiotic resistance, as well as consolidating promising therapeutic approaches for these infections.

Primeiro caso de micobacteriose cutânea em um felino doméstico no sul do Brasil

Tegumentary mycobacteriosis in cats is not very common. Three manifestations of skin disease associated with mycobacteria are recognized in domestic cats: feline leprosy, cutaneous tuberculosis and atypical mycobacteriosis. This study aims to describe a case of feline pyogranulomatous panniculitis associated with Mycobacterium spp., diagnosed through histopathology and histochemistry. The case occurred in a domestic feline, three years old, five kg, male, of mixed breed, which, in the clinical-physical exam, presented multiple subcutaneous nodules without ulceration of the epidermis and of firm-elastic consistency in the axillary and pectoral regions. One of the axillary nodules was surgically removed, placed in 10% formalin and sent for anatomopathological examination. Histologically, severe, sometimes multifocal, marked focally extensive pyogranulomatous dermatitis and panniculitis were revealed. Amid pyogranulomatous panniculitis, there was the formation of extracellular lipid vacuoles, also called lipocysts, surrounded by numerous neutrophils and histiocytes and with a lumen displaying eosinophilic amorphous material with a granular appearance. Histological sections were submitted to special Ziehl-Neelsen staining to detect alcohol-acid-resistant bacillus (BAAR), revealing multiple extra and intra-histiocytic mycobacteria inside the lipocysts. Thus, the anatomopathological and histochemical findings found in the feline indicated that this was the first case of pyogranulomatous dermatitis and panniculitis associated with Mycobacterium spp. reported in southern Brazil.

Measuring body composition in dogs using bioelectrical impedance spectroscopy

Assessment of body composition is an essential aspect of veterinary canine care, particularly as prevalence of overweight and obesity in dogs is increasing. Few quantitative objective methods for body composition measurement are available for routine clinical use. Bioelectrical impedance analysis is widely used in human medicine and nutritional assessment and although it has shown promise in production animals it has not yet been adopted for companion animals. The present study validated bioimpedance spectroscopy (BIS) against the reference method of dual-energy X-ray absorptiometry.Resistivity coefficients for use in BIS were determined: ρe = 444.8 and ρi = 1477.8 ohm.cm and used to predict fat-free mass (FFM) in a cohort of 35 mixed breed dogs. Overall, FFM was predicted to within 3.5% of reference values. At an individual level, FFM was predicted within 2 standard deviations (95% confidence) of 10%. BIS provides an objective quantitative alternative to the widely used semi-quantitative body condition scoring. In addition, BIS provides estimates of body water volumes (total, extra-and intracellular), information that can be useful in fluid management. BIS is inexpensive, and simple to perform but does require brief (<5 min) sedation of the animal.

The Effects of the Dietary Inclusion of By-Products Obtained after the Extraction of Vitamin B2 from Fermented Soybean on the Performance and Meat Quality of Growing–Finishing Pigs

The by-products obtained after the extraction of vitamin B2 from fermented soybean (VBP), primarily consisting of soybean meal, soybean oil, vitamin B2, and Bacillus subtilis, may serve as a cost-effective and recycled resource in animal feed. This research aimed to assess the impact of VBP on the growth performance, nutrient utilization, blood parameters, and meat quality of pigs in the growing–finishing phase. In this 16-week feeding experiment, 140 pigs of mixed breed [Duroc × (Landrace × Yorkshire)] were used, with an initial average body weight of 26.05 ± 1.32 kg. The pigs were assigned randomly to one of four dietary groups, each consisting of five pigs, with two gilts and three barrows per pen, and a total of seven repetitions per treatment. The animals were fed different levels of by-products after vitamin B2 extraction (0, 10, 20, and 30 g/kg as the CON, VBP10, VBP20, and VBP30 dietary groups, respectively) in a three-phase feeding trial (wk. 0–4, 4–8, and 8–13). When higher levels of VBP were added as supplements, the outcomes indicated that there were no notable variations (p &gt; 0.05) in growth performance and nutrient digestibility among the treatment groups throughout the trial. In phase II (4–8 weeks), the inclusion of VBP in the diets showed a reduction (p = 0.011; with linear and quadratic effects, p = 0.003) in serum norepinephrine concentration. The sensory evaluation of meat color was linearly improved (p = 0.043) in pigs fed with graded levels of VBP supplementation. The percentage of lean meat showed a significant improvement (p = 0.016) with the gradual levels of VBP supplementation. The addition of 30 g/kg (on an as-fed basis) of vitamin B2 by-products in the diet can simultaneously mitigate the negative impacts of acute stress without compromising growth performance and enhance the percentage of lean meat. These findings suggest that VBP could be a viable and economical alternative to corn and soybean meal and partially replace it in pig feed.

Effect of dietary antioxidants on free radical damage in dogs and cats.

Alpha-tocopherol (vitamin E) is an antioxidant that is largely involved in immune defense and enhancing the ability of biological systems to respond to oxidative stress. During the process of free radical scavenging, vitamin C supports the regeneration of vitamin E. Although the functions of antioxidants and their importance have been widely studied, the intricate interplay between antioxidants has yet to be fully elucidated, especially in dogs and cats. As such, the objective of the present study was to determine the effect of a combination of dietary antioxidants on DNA damage and antioxidant status in dogs and cats. Forty adult mixed-breed dogs and 40 adult domestic shorthair cats were randomly assigned to one of four treatment groups per species. Dogs and cats remained in these groups for the 84-d duration of the study. The food differed in antioxidant supplementation with the control food meeting all of the Association of American Feed Control Officials requirements for complete and balanced nutrition, including sufficient vitamin E to exceed the published minimum. The treatment diets were targeted to include either 500, 1,000, or 1,500 IU vitamin E/kg as well as 100ppm of vitamin C and 1.5ppm of β-carotene in the food. The effect of vitamin E supplementation level on serum vitamin E concentration, DNA damage, and total antioxidant power was evaluated. Feeding diets enriched with antioxidants resulted in an increased (P < 0.05) circulating vitamin E concentration, increased (P < 0.05) immune cell protection, reduced (P < 0.05) DNA damage in dogs, and an improved (P < 0.05) antioxidant status. Overall, these data demonstrated that feeding a dry kibble with an antioxidant blend inclusive of vitamin E, vitamin C, and β-carotene enhanced cell protection and improved antioxidant status in dogs and cats.

Estimating the heritability of nitrogen and carbon isotopes in the tail hair of beef cattle

BackgroundThe natural abundance of nitrogen (δ15N) and carbon (δ13C) isotopes in animal tissues are used to estimate an animal’s efficiency in nitrogen utilization, and their feed conversion efficiency, especially in tropical grazing systems with prolonged protein restriction. It is postulated that selection for improving these two characteristics (δ15N and δ13C) would assist the optimisation of the adaptation in ever-changing environments, particularly in response to climate change. The aim of this study was to determine the heritability of δ15N and δ13C in the tail hair of tropically adapted beef cattle to validate their inclusion in genetic breeding programs.MethodsIn total, 492 steers from two breeds, Brahman (n = 268) and Droughtmaster (n = 224) were used in this study. These steers were managed in two mixed breed contemporary groups across two years (year of weaning): steers weaned in 2019 (n = 250) and 2020 (n = 242). Samples of tail switch hair representing hair segments grown during the dry season were collected and analysed for δ15N and δ13C with isotope-ratio mass spectrometry. Heritability and variance components were estimated in a univariate multibreed (and single breed) animal model in WOMBAT and ASReml using three generations of full pedigree.ResultsThe estimated heritability of both traits was significantly different from 0, i.e. 0.43 ± 0.14 and 0.41 ± 0.15 for δ15N and δ13C, respectively. These traits had favourable moderate to high genetic and phenotypic correlations (− 0.78 ± 0.16 and − 0.40 ± 0.04, respectively). The study also provides informative single-breed results in spite of the limited sample size, with estimated heritability values of 0.37 ± 0.19 and 0.19 ± 0.17 for δ15N and δ13C in Brahman, and 0.36 ± 0.21 and 0.46 ± 0.22 for δ15N and δ13C in Droughtmaster, respectively.ConclusionsThe findings of this study show, for the first time, that the natural abundances of both nitrogen and carbon isotopes in the tail hair in cattle may be moderately heritable. With further research and validation, tail hair isotopes can become a practical tool for the large-scale selection of more efficient cattle.

FUNGAL DERMATITIS INFECTION OF MALASSEZIA SPP. IN MIXED BREED DOG

Malassezia dermatitis is a skin disease caused by fungi of Malassezia spp. that can be superficial and systemic with local or generalised lesions. The purpose of this report is to diagnose and determine the therapeutic success of dermatitis caused by Malassezia spp. fungal infection systemically with generalised and chronic lesions. An 8-year-old mixed breed dog weighing 6.41 kg was examined at the Veterinary Internal Medicine Laboratory, Faculty of Veterinary Medicine, Udayana University with complaints of itching and hair baldness. Clinical examination found generalised alopecia with thickening of the skin, hyperpigmentation on the neck and dorsal region of the body, erythema and papules on the abdominal flank and caudal extremity of the lateral femoral, and scale on the head area. Cytological examination of the skin taken by impression smear found the fungal agent Malassezia spp. Routine haematological examination showed that the dog had lymphocytosis, and hypochromic normocytic anaemia. Based on anamnesis, physical examination, and supporting examination, the dog was diagnosed with dermatitis caused by a Malassezia spp. fungal infection with a fausta prognosis. The dog was treated with oral ketoconazole, chlorpheniramine maleate, fish oil, sebasol shampoo, and dryfood (Dograng classic®). The results of therapy on the 28th day showed that the dog's condition was getting better as indicated by significant hair growth. Therefore, to avoid recurrent infections owners need to avoid keeping their dogs in damp places and stop using human shampoos and dish soaps to bathe their dogs as they can affect the pH of the skin, triggering fungal growth.

TREATMENT FOR TRANSMISSIBLE VENEREAL TUMOR IN FEMALE DOG WITH TUMOR EXCISION THROUGH EPISIOTOMY APPROACH

Transmission Venereal Tumor (TVT) is a malignant tumor that is contagious in dogs. Tumors are transmitted to other dogs generally through direct contact with dogs of sufferers during the mating season. A mixture of a female Rottweiler-Corgi mix breed called a 5-year-old Bocil, black and brown hair, with a body weight of 8.9 kg has a complaint of a lump in the vulva and genital swelling accompanied by the release of blood from the genitals. Routine hematology examination shows dogs experiencing thrombocytopenia. Histopathological examination of tumor tissue, indicates the presence of tumor cells in the form of lymphoblasts that experience modosis, and many hyperchromatic polymorphonuclear cells are found. Based on the history, clinical examination, and supporting examination, dogs are diagnosed with transmission venereal tumors. Surgery is carried out with the excision of the mass of the tumor through the episiotomy approach. Postoperatively given CefotaXime antibiotics at a dose of 20 mg/kg BW in IV Q12 hours for three days and analgesic dipyrone 25 mg/kg BW in IV q12 hours for 3 days, followed by giving Cefixime antibiotics 10 mg/kg BW twice four days and analgesic metamizole 25 mg/kg PO twice a day for 2 days. Dogs are given vincristine sulphate chemotherapy at a dose of 0.025 mg/kg BW intravenously every 1 time a week for three weeks in a row. On the 21st day postoperative sex size shrink and no blood is found from the vagina. Prevention of recurrent TVT in dogs needs to be minimized by performing ovariohysterectomy surgery.

Mutations in the GDF8 Gene in Double-Muscled Cattle: Mechanisms of Action and Relevance for Livestock Production

Myostatin (MSTN) has the function of limiting muscle growth, keeping satellite cells quiescent and acting on cell development, proliferation, differentiation, adhesion, migration and apoptosis. The mutation in the GDF8 gene proved to be advantageous as it presents some important attributes for the production of beef cattle, such as: gains in feed conversion and meat quality, making the meat leaner and more tender, resulting in intense selection for use in crossing programs in Brazil and around the world. We carried out a literature review on the mutation in the GDF8 gene in different breeds of Double Muscled cattle. We evaluated the frequency of polymorphisms present in research and observed that Indel c. 818 and MSTN-F94L were the markers most used in research. The MSTN-F94L polymorphism influenced musculature in the Jersey-Limousin backcross population. Furthermore, the polymorphism is strongly associated with the additive effect on birth weight, weaning weight and yearling weight, in addition to increasing the ease of direct birth in pure or mixed breeds. GDF8 gene polymorphisms can be used to improve performance traits in beef cattle. However, the influence of these markers needs to be determined in each herd.

Sero-Conversion Status of Different Breeds of Chickens Vaccinated With Newcastle Disease I2 Vaccine Type around Hawassa, Ethiopia

Chickens are vaccinated with live attenuated and inactivated vaccines in order to control Newcastle disease (ND). The vaccine can be administered by eye drop, aerosol or drinking water. Humoral antibodies usually appear within 6 to 10 days after vaccination in the serum and also locally in the upper respiratory tract and in the intestine. The efficacy of vaccinations can be estimated best with challenge experiments but they are expensive and time consuming. For the current study, a cross sectional study was conducted to determine the sero-conversion status of ND I-2 vaccine type provided to chicken reared in intensive, semi-intensive and extensive farms in Sidama region, Ethiopia. Of the total 401 samples collected from 29 various flock sizes 363(90.5%) were protective at individual bird level; whereas at flock level 86.2% (25/29) were met above 80% protection. Of 29 flocks 12 (42.4%) flocks were found 100% protective from the disease. The CV% varied between 21.2% and 122.3 percent among the flocks. The uniformity of average antibody titer for Bovans breed (CV%: 56.7) was comparatively better followed by Sasso (CV%: 69.2), Local breed (CV%: 73.1) and mixed breeds (CV%: 83). The overall average minimum, maximum and mean antibody titer for this study was 1179.8, 13840.1 and 5945, respectively. However, the minimum and maximum antibody titer for this study was 37.4 for Sasso breed with the age of 8 months and 20465.8 for mixed type of breed with the age of 12 months respectively. Significant antibody titer variation was observed among Breeds (p=0.018) and Ages (p=0.001) of the birds in this study. In general, the vaccination scheme for the current study revealed ND I-2 vaccine type was effective in protecting the chickens from the disease in respective of the age of birds at vaccination although the pattern of uniformity for antibody production is variably interrupted among the flocks.

Caracterização histopatológica e análise de proliferação celular em 162 casos de mastocitoma subcutâneo em cães no Brasil

ABSTRACT: There are limited publications about canine subcutaneous mast cell tumors (MCT). International studies have shown that subcutaneous MCT has longer survival times than cutaneous MCT, with lower recurrence and metastasis rates. In addition, subcutaneous MCT has a specific histopathological classification (circumscribed, combined, or infiltrative pattern). Our study evaluated 162 cases of subcutaneous MCT diagnosed from 2014 to 2017 in Brazil. The mean age of the animals was 8.6 years, with a predominance of females and higher incidence in dogs with mixed breed (n=40), followed by Boxer (n=20), Labrador Retriever (n=14), Golden Retriever (n=11) and Pug (n=10). Regarding histopathological characterization, the most common infiltrative pattern represented 54.3% of cases, followed by circumscribed (34.8%) and combined (11%) patterns. The mean mitotic index (MI) was 1.04, with 93.9% of cases presenting MI≤4 and 53.1% MI=0. The data found in this Brazilian study regarding subcutaneous MCT does not differ from those described in American studies, suggesting similar genetic and epidemiological factors. The evaluated proliferation indices suggest that subcutaneous MCT presents slow progression and should be evaluated as a distinct form of cutaneous MCT.

Otite externa associada a Demodex cati - relato de caso

ABSTRACT Feline demodicosis caused by Demodex cati is a rare parasitic disease, characterized by local or generalized dermatitis and less commonly by otitis. A feline, male, castrated, mixed breed, 11 years old, presented progressive cervical pruritus with alopecia in the caudolateral region of the right ear and mild erythema, abrasions, brownish ceruminous secretion and otopodal reflex. He had a history of feline immunodeficiency virus (FIV) infection and feline gingivitis stomatitis complex (GSC), in addition to continuous use of prednisolone. In the parasitological examination of the cerumen, different stages of Demodex sp. were found. Genetic sequencing revealed 99.33% homology for D. cati. Therapy with imidacloprid and moxidectin in spot-on formulation, in two doses at 30-day intervals, promoted remission of clinical signs and elimination of the mite.

Estudo retrospectivo e espacial de diagnósticos anatomopatológicos da criptococose canina e felina em municípios do estado de São Paulo

ABSTRACT Cryptococcosis is a systemic mycosis caused by the genus Cryptococcus that affects humans and animals. The present study aimed to describe the epidemiological and anatomopathological profiles, occurrence, and distribution of the infection by Cryptococcus spp. in 30 dogs and 110 cats residing in the State of São Paulo, from 2014 to 2020. The study evaluated the results from 140 necropsies and histopathology and cytopathology tests provided by Veterinary Pathology services. A higher occurrence of positive diagnosis was observed in females of both cats and dogs, adults, and mixed breeds of both species. The main diagnostic method used was histopathology, with a predominance of integumentary lesions in dogs and cats (skin pattern), with no significant difference between species and lesion location (p≤ 0.827). The time-spatial distribution showed a significant increase in the diagnoses in dogs and cats over the seven years, the identification of areas with a higher rate of diagnosis of cryptococcosis such as Campinas and São José do Rio Preto, and the positive correlation of a diagnosis with climatic data. Retrospective studies of anatomopathological data help to identify suspected cases of cryptococcosis and demonstrate the importance of monitoring and surveillance of cryptococcosis.

Linfoma multicêntrico de células T periférico, tumor de células da granulosa e adenocarcinoma papilar ovariano em uma cadela - relato de caso

ABSTRACT The frequency of ovarian neoplasms in dogs is low, and these tumors are often underdiagnosed mainly due to nonspecific clinical signs. Multiple ovarian tumors are rarely described in dogs and can be of primary or secondary origin. Lymphomas, in turn, are among the most common malignant neoplasms in dogs, with a variable clinical course. This report describes a case of multiple concomitant ovarian tumors and a multicentric lymphoma in a dog, diagnosed histologically and confirmed by immunohistochemistry. The right and left ovaries and mesenteric lymph node of a 14-year-old mixed breed female dog were received for histopathological evaluation. Histologically, a multicentric small to intermediate cell lymphoma was diagnosed in the lymph node and both ovaries, in addition to a bilateral granulosa cell tumor and papillary adenocarcinoma in one of the ovaries. Immunohistochemistry determined the diagnosis of multicentric peripheral T-cell lymphoma. Coexisting ovarian tumors are rarely described in the literature but can occur. This is the first report of these three neoplasms occurring concomitantly in the same organ. Therefore, clinicians and pathologists should be aware of this possibility when evaluating ovaries.

Establishing a clinically applicable frailty phenotype screening tool for aging dogs.

Frailty is a well-defined clinical syndrome in humans caused by accumulation of impairments which result in loss of reserve capacity and increased vulnerability to disability, dependence, and death. Dogs are of particular interest in studies of frailty due to the similarities they share with people in their environment, lifestyles, and age-related diseases. The aim of this study was to develop a frailty phenotype screening tool, based on previously validated measures in dogs, which could be easily applied in the clinical setting, and which was predictive of all-cause, short term (6-month) mortality. The study was conducted in two phases. In phase 1, a retrospective cohort of 51 dogs was used to identify and evaluate potential measures for the five domains of frailty. This information was then used to develop a simple frailty phenotype based on examination findings and owner directed questions. In phase 2 of the study, this phenotype was evaluated in a prospective cohort of 198 dogs aged 9 years or older from multiple different specialty and primary care services to determine how the phenotype performed across a diverse canine population. The developed frailty phenotype was predictive of all-cause, short-term mortality independent of age, sex, or weight (hazard ratio = 4.71; 95% CI, 2.66-8.8). Of the covariates evaluated only breed was significant, with purebred dogs having 1.85 times higher mortality than mixed breed dogs (95% CI, 1.04-3.31). The frailty phenotype performed similarly across all hospital services from which patients were enrolled. Based on these findings, the defined frailty phenotype represents a valuable screening tool for early risk identification and intervention, and can aid in clinical decision making for owners and veterinarians. Additionally, it will promote further research into the understanding and treatment of frailty in dogs.

Icterícia em gatos: causas e resultados post-mortem em 44 casos

ABSTRACT: The aim of this study was to describe the pathological findings and causes of jaundice in 44 cats (Felis catus) over a six-year period. The cats were from two Brazilian metropolitan areas: 34.1% were female, 56.8% were male, and 9.1% had no information regarding their sex. Their ages ranged from 6 months to 13 years. Most of the cats examined were of a mixed breed (40/44), whereas the others were Angora (2/44), Oriental Short Hair (1/44) and Persian (1/44). All animals had mild to marked jaundice, and 39 were diagnosed with mild to marked anemia. The classification of icterus types (pre-hepatic, hepatic and post-hepatic) was based on gross and microscopic findings. Of the 44 animals, 10 were classified as pre-hepatic icterus, 33 with hepatic icterus and seven with post-hepatic icterus. In some cats, two types of icterus were found, of which five were classified as pre-hepatic and hepatic icterus, and one case was hepatic and post-hepatic icterus. According to the gross and microscopic findings, the cause of pre-hepatic icterus was idiopathic hemolytic anemia. The most frequent cause of hepatic icterus was hepatic lipidosis (26/44), followed by perihepatitis and hepatitis compatible with feline infectious peritonitis, lymphoma, glycogenic degeneration, cholangiocarcinoma and metastatic myeloid leukemia. In animals with post-hepatic icterus, the causes included cholangitis due to Platynosomum spp. infection, cholangioma of the common hepatic duct, and chronic cholangitis. Understanding the etiopathogenesis of jaundice requires an accurate clinic-pathological study and concomitant causes of the disease in cats should be considered.

Hemangiossarcoma cutâneo em equino - relato de caso

ABSTRACT Hemangiosarcoma is a rare neoplasia in horses, with a reported prevalence of 0% to 0.7% and literature reports are few. Here we report a case of cutaneous hemangiosarcoma on the palmaromedial aspect of the metacarpophalangeal joint of the right thoracic limb of a 28-year old mixed breed mare. Macroscopically, the lesion was ulcerated and hemorrhagic, with significant involvement of the surrounding tissues resulting in acquired flexural deformity of the metacarpophalangeal joint and grade 4/5 lameness (AAEP). The diagnosis was confirmed histologically. Surgical ablation was not possible and, in view of the involvement of surrounding tissues and the age of the patient, the lesion was treated conservatively.

Effects of ketamine, propofol and isoflurane on electrocardiographic variables in clinically healthy dogs premedicated with medetomidine and midazolam.

The purpose of this study was to investigate the effects of three anesthetic agents, with premedication of medetomidine and midazolam, on electrocardiographic variables in dogs. Ten adult mixed breed dogs were used in a crossover design study, where they received ketamine, propofol and isoflurane treatments with a one-week washout period between them. In all three groups, medetomidine was administered first followed by midazolam after 15 min. Then, after 20 min, group 1 received ketamine intravenously (IV), group 2 received propofol (IV), and group 3 received isoflurane (inhalation). In all dogs, electrocardiographs were taken before and after premedication's, as well as every 15 min during anesthesia. Medetomidine significantly decreased heart rate and P wave amplitude and increased PR interval, R wave amplitude, QT interval, and T wave amplitude. Midazolam increased the amplitude of the R and T waves. Ketamine increased the heart rate and PR interval. Propofol increased the heart rate for up to 15 min, decreased the PR interval for up to 30 min, and the QT interval for up to 45 min. Isoflurane increased the heart rate and decreased the amplitude of R and T waves. The results showed that the drugs used in this study did not have many side effects on electrocardiographic variables and could be used without serious concern. The most important side effects observed were a severe reduction in heart rate and 1st degree atrioventricular (AV) block and, to a lesser extent, 2nd degree AV block caused by medetomidine and midazolam which were masked by the anesthetics.

Evaluation of cat tumors in Samsun between 2004-2022

This study investigated the incidence of various tumors detected in 169 cat tissue and organ samples brought to the Samsun Ondokuz Mayis University, Veterinary Faculty, Department of Pathology between 2004–2022. Of the 169 specimens, five were acquired from necropsy and 164 were biopsy samples. Various tumors were evaluated retrospectively according to localization, sex, breed, and tumor origin. Tumors were common in mixed breeds (n = 96, 56.8%). Age of tumor incidence was examined; cats between 6 and 9 years of age most frequently had tumors (n = 45, 26.6%) in both sexes. In terms of tumor origin, 79 (47.0%) were mesenchymal, 83 (49.4%) were epithelial, and seven (4.2%) were of mixed components, i.e., mesenchymal and epithelial. In total, 147 (87%) tumors were classified as malignant and 22 (13%) tumors were classified as benign. Regardless of sex, the most commonly observed tumors were skin and subcutis tumors (n = 56, 32.1%). In conclusion, tumor incidence in Samsun was determined by retrospectively evaluating tumors in cats according to location, breed, sex, age range, and origin and comparing these with the literature.

Back passage of haemorrhagic septicaemia (HS) vaccine seed C82 in cattle calf

Haemorrhagic septicaemia (HS) is caused by Pasteurella multocida serotypes B: 2, a Gram-negative coccobacilli bacterium. It causes fatal septicaemia with high mortality in cattle and buffaloes. Disease control and prevention are by effective HS vaccination in animals. A study was conducted on one mixed breed cattle calf for back passage of haemorrhagic septicaemia (HS) seed strain C82. Prior to bacterial inoculation in the calf, Mouse Protection Test (MPT) was conducted to ensure the calf is free from any HS antibody. The calf was injected subcutaneously with 0.5 ml dilutions of 10-3 of the bacteria incubated overnight (approximately 106 CFU/ml). After ±30 hours inoculation, post-mortem was conducted on the calf showing sign of HS. Heart blood and organ samples were collected and cultured on blood agar to determine bacteria purity. Blood and organ samples were also sent to the bacteriology laboratory in VRI for confirmatory tests. The death of the calf is confirmed by re-isolation of Pasteurella multocida Type B. Heart blood collected was processed, freeze-dried and keep as vaccine seed for further usage in vaccine production. Revival of vaccine seed is needed to ensure its pathogenicity and functionality for production purposes.