cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.19968456.v1
title: Evaluation of different fixatives for histological studies in canine ear skin

description: ABSTRACT The biological fixatives have an important role in the final histology quality. In veterinary, routine skin biopsy is a common procedure and the choice of fixative is essential for the final result. The most common fixative is Formalin, even though it is toxic, carcinogenic, and has low and slow penetration. Still, there isn't a fixer which can replace the qualities of formalin. The aim of this study was to evaluate qualitatively the preservation of the histological features of dog skin using different tissue fixative embedded in paraffin, sectioned and stained with hematoxylin - eosin. We used a 4 mm punch pen to collect ear skin samples in six dog cadavers. After collection, the tissues were fixed in: (1) Bouin for 6 hours; (2) Carnoy for 4 hours; (3) 10% buffered formaldehyde for 24 hours, all under refrigeration (4 ° C). The tissues were then processed, sectioned and stained with hematoxylin and eosin. The slides were evaluated blindly by four different pathologists who considered the qualitative aspects below: (1) quality of coloring; (2) preservation of the histological characteristics; (3) preservation of cytoplasmic boundaries using a Likert scale score for each blade. The fixative with the highest mean score on all items was buffered formalin with 3.76 points followed by Bouin (3.39) and Carnoy (2.52). Formaldehyde can bring health a risk of professional routine handling, so it is necessary to search for a biological fixative with the same qualities being less harmful to health.
DOI: 10.6084/m9.figshare.19968458
title: Prognostic value of heart rate variability and Holter monitoring in Boxer dogs with arrhythmogenic right ventricular cardiomyopathy

description: ABSTRACT Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an important cause of sudden death in Boxer dogs. Validation of prognostic factors for this disease could help in detecting more severely affected animals and their exclusion from breeding programs. The aims of this study were to evaluate the prognostic significance of presence of symptoms, heart rate variability (HRV) indices and ventricular or supraventricular arrhythmias recorded by Holter monitoring on survival of Boxer dogs with ARVC at different stages. Symptoms, arrhythmias registered on Holter and five HRV indices were prospectively analyzed in 69 client-owned Boxer dogs divided into five groups: control Boxer dogs (CB group, &lt;50 VPC/24 hours, n=28), suspicious Boxers (SB group, 50 to 300 VPC/24 hours, n=8), Boxers with ARVC (ARVC group, &gt;300 VPC/24 hours, n=19), Boxers with ARVC and systolic dysfunction without congestive heart failure (SDB without CHF group, n=6) and with CHF (SDB with CHF group, n=8). Statistical analyses consisted of an ANOVA test, Pearson correlation and Cox's proportional hazards regression. Compared to the CB group, no decrease in HRV indices was found in SB, ARVCB or SDB without CHF groups; otherwise, SDB with CHF group had impaired indices. No relation was found between HRV indices and cardiac-related death, but the presence of syncopes with or without clinical signs of heart failure and number of ventricular tachycardia (VT), were correlated with survival. These results allow us to conclude that the presence of symptoms of heart failure, presence of syncopes and number of VT on Holter examination seem to have prognostic value in Boxer ARVC.
DOI: 10.6084/m9.figshare.19968458.v1
title: Prognostic value of heart rate variability and Holter monitoring in Boxer dogs with arrhythmogenic right ventricular cardiomyopathy

description: ABSTRACT Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an important cause of sudden death in Boxer dogs. Validation of prognostic factors for this disease could help in detecting more severely affected animals and their exclusion from breeding programs. The aims of this study were to evaluate the prognostic significance of presence of symptoms, heart rate variability (HRV) indices and ventricular or supraventricular arrhythmias recorded by Holter monitoring on survival of Boxer dogs with ARVC at different stages. Symptoms, arrhythmias registered on Holter and five HRV indices were prospectively analyzed in 69 client-owned Boxer dogs divided into five groups: control Boxer dogs (CB group, &lt;50 VPC/24 hours, n=28), suspicious Boxers (SB group, 50 to 300 VPC/24 hours, n=8), Boxers with ARVC (ARVC group, &gt;300 VPC/24 hours, n=19), Boxers with ARVC and systolic dysfunction without congestive heart failure (SDB without CHF group, n=6) and with CHF (SDB with CHF group, n=8). Statistical analyses consisted of an ANOVA test, Pearson correlation and Cox's proportional hazards regression. Compared to the CB group, no decrease in HRV indices was found in SB, ARVCB or SDB without CHF groups; otherwise, SDB with CHF group had impaired indices. No relation was found between HRV indices and cardiac-related death, but the presence of syncopes with or without clinical signs of heart failure and number of ventricular tachycardia (VT), were correlated with survival. These results allow us to conclude that the presence of symptoms of heart failure, presence of syncopes and number of VT on Holter examination seem to have prognostic value in Boxer ARVC.
DOI: 10.6084/m9.figshare.19968459
title: Assessment of myocardial depression by two-dimensional feature tracking in dogs with sepsis

description: ABSTRACT The aim of this prospective study was to analyze the left ventricular function of dogs who had sepsis or not and diagnose myocardial depression early on through the two-dimensional feature tracking imaging (2D-FTI). Twenty-nine dogs diagnosed with pyometra, a pathology used as an experimental model for sepsis were evaluated. The animals were subjected to conventional echocardiography and 2D-FTI, and divided into three groups: Group I (control), group II (sepsis pyometra) and group III (no sepsis pyometra). Regarding the parameters of conventional echocardiography, there was no statistical difference between the groups. As for the radial Strain, group II and III had lower ventricular function at diagnosis (22.805.80 Group I; 18.455.96 Group II; 18.719.45 Group III; P = 0.032) and group III maintained this reduction in return. Regarding the radial Strain rate, only the III group had lower ventricular function at diagnosis (1.900.57 Group I; 1.910.70 Group II, 1.570.53 Group III; P = 0.021). For the Longitudinal Strain we observed lower ventricular function in groups II and III at diagnosis (11.043.38 Group I, Group II 8.593.97, 8.211.99; P = 0.048) and ten days after surgery (11.043.38 Group I; 9.002.16 Group II; 8.122.27 Group III; P = 0.048). The 2D-FTI was able to detect early changes in left ventricular function, suggesting myocardial depression frame, even in female dogs with pyometra without clear clinical picture of sepsis, which were not seen in conventional echocardiography. Thus, this model can be useful in diagnosis, because it can detect early cardiac changes, enabling a rapid therapeutic intervention.
DOI: 10.6084/m9.figshare.19968459.v1
title: Assessment of myocardial depression by two-dimensional feature tracking in dogs with sepsis

description: ABSTRACT The aim of this prospective study was to analyze the left ventricular function of dogs who had sepsis or not and diagnose myocardial depression early on through the two-dimensional feature tracking imaging (2D-FTI). Twenty-nine dogs diagnosed with pyometra, a pathology used as an experimental model for sepsis were evaluated. The animals were subjected to conventional echocardiography and 2D-FTI, and divided into three groups: Group I (control), group II (sepsis pyometra) and group III (no sepsis pyometra). Regarding the parameters of conventional echocardiography, there was no statistical difference between the groups. As for the radial Strain, group II and III had lower ventricular function at diagnosis (22.805.80 Group I; 18.455.96 Group II; 18.719.45 Group III; P = 0.032) and group III maintained this reduction in return. Regarding the radial Strain rate, only the III group had lower ventricular function at diagnosis (1.900.57 Group I; 1.910.70 Group II, 1.570.53 Group III; P = 0.021). For the Longitudinal Strain we observed lower ventricular function in groups II and III at diagnosis (11.043.38 Group I, Group II 8.593.97, 8.211.99; P = 0.048) and ten days after surgery (11.043.38 Group I; 9.002.16 Group II; 8.122.27 Group III; P = 0.048). The 2D-FTI was able to detect early changes in left ventricular function, suggesting myocardial depression frame, even in female dogs with pyometra without clear clinical picture of sepsis, which were not seen in conventional echocardiography. Thus, this model can be useful in diagnosis, because it can detect early cardiac changes, enabling a rapid therapeutic intervention.
DOI: 10.6084/m9.figshare.19968461.v1
title: Partial hepatectomy in a calf with an omphalocele: case report

description: ABSTRACT An omphalocele is a defect in the closure of the abdominal wall during the embryonic stage, preventing the return of some abdominal organs to the cavity. In stillborn animals, the involvement of the liver in the omphalocele has been reported. The aim of the present study is to report the success of a partial liver resection in a female bovine at two days of age which presented an omphalocele at birth. Surgical intervention was indicated to reduce and suture the abdominal wall. During the surgical procedure, the presence of hard, reddish tissue was noted inside the sac covered by the amniotic membrane, with characteristics consistent with hepatic parenchyma. Due to the impossibility of reducing the contents added to the suggestion of tissue infection, we elected to perform a partial resection. The histopathological examination confirmed that the resected tissue was of the hepatic parenchyma. Antibiotic and systemic anti-inflammatory therapies were performed post-surgery. Fifteen days after surgery, infection was detected at the surgical site in addition to abdominal wound dehiscence; surgical reintervention was performed. On physical examination, carried out 4 months after the second operation, the heifer presented normal development for the species. In conclusion, omphalocele may contain liver. Ectopic liver is an extremely rare condition. Surgical treatment in the presented case focused on umbilicus with exploration of the abdominal cavity appeared to be sufficient.
DOI: 10.6084/m9.figshare.19968461
title: Partial hepatectomy in a calf with an omphalocele: case report

description: ABSTRACT An omphalocele is a defect in the closure of the abdominal wall during the embryonic stage, preventing the return of some abdominal organs to the cavity. In stillborn animals, the involvement of the liver in the omphalocele has been reported. The aim of the present study is to report the success of a partial liver resection in a female bovine at two days of age which presented an omphalocele at birth. Surgical intervention was indicated to reduce and suture the abdominal wall. During the surgical procedure, the presence of hard, reddish tissue was noted inside the sac covered by the amniotic membrane, with characteristics consistent with hepatic parenchyma. Due to the impossibility of reducing the contents added to the suggestion of tissue infection, we elected to perform a partial resection. The histopathological examination confirmed that the resected tissue was of the hepatic parenchyma. Antibiotic and systemic anti-inflammatory therapies were performed post-surgery. Fifteen days after surgery, infection was detected at the surgical site in addition to abdominal wound dehiscence; surgical reintervention was performed. On physical examination, carried out 4 months after the second operation, the heifer presented normal development for the species. In conclusion, omphalocele may contain liver. Ectopic liver is an extremely rare condition. Surgical treatment in the presented case focused on umbilicus with exploration of the abdominal cavity appeared to be sufficient.
DOI: 10.6084/m9.figshare.19968465
title: Crude glycerin in diets of juvenile tambaqui

description: ABSTRACT This study examined the level of crude glycerin in total replacement of soybean oil and partial replacement of corn in diets for tambaqui without ingredient interfering on the growth performance of these animals. The study was conducted at the Federal University of Tocantins, evaluating five levels of crude glycerin inclusion (0%, 7.5%, 10%, 12.5%, and 15%) in 3 replicates with 10 animals each (n = 150 tambaqui.) These animals were fed the experimental diets for a period of 75 days (15 days of adaptation and 60 days of trial), at the end of this period the animals were restrained to measure the values of the growth performance of animals (Specific growth rate, apparent food conversion, feed efficiency, hepatosomatic index, weight gain, and condition factor). During the study period, there were no deaths and in all indices evaluated, only the animal's condition factor presented statistical difference when comparing the initial and final periods of the experiment. The inclusion of up to 15% crude glycerin in tambaqui diets in total replacement of soybean oil and partial replacement of corn can be used without prejudice to the growth performance of the species studied.
DOI: 10.6084/m9.figshare.19968465.v1
title: Crude glycerin in diets of juvenile tambaqui

description: ABSTRACT This study examined the level of crude glycerin in total replacement of soybean oil and partial replacement of corn in diets for tambaqui without ingredient interfering on the growth performance of these animals. The study was conducted at the Federal University of Tocantins, evaluating five levels of crude glycerin inclusion (0%, 7.5%, 10%, 12.5%, and 15%) in 3 replicates with 10 animals each (n = 150 tambaqui.) These animals were fed the experimental diets for a period of 75 days (15 days of adaptation and 60 days of trial), at the end of this period the animals were restrained to measure the values of the growth performance of animals (Specific growth rate, apparent food conversion, feed efficiency, hepatosomatic index, weight gain, and condition factor). During the study period, there were no deaths and in all indices evaluated, only the animal's condition factor presented statistical difference when comparing the initial and final periods of the experiment. The inclusion of up to 15% crude glycerin in tambaqui diets in total replacement of soybean oil and partial replacement of corn can be used without prejudice to the growth performance of the species studied.
DOI: 10.6084/m9.figshare.19968467
title: Soluble and insoluble fractions of the sardine waste protein hydrolysate in silver catfish feeding: feed intake and excretion of ammonia

description: ABSTRACT The fish protein hydrolysate is produced by the enzymatic hydrolysis of seafood industry wastes, resulting in a high quality ingredient to be used in fish feed. The aim of this study was to determine the effect of the fractions of the sardine protein waste hydrolysate fractions on feed intake and ammonia excretion of silver catfish. The soluble and insoluble fractions of the sardine muscle hydrolysate, evaluated individually and in combination were tested. Juvenile silver catfish (9.76±0.55g) were divided into twelve 20L aquaria, in the density of four fish per tank, resulting in an average biomass of 1.90±0.17g/L. The protein hydrolysate was produced with fresh sardine carcasses using the enzyme Protamex(r) bacterial protease (Novozymes A/S) and soluble and insoluble fractions were derived. The diets were isonitrogenous (39% CP) and isocaloric (4450kcal EB/kg) and the hydrolysate fractions were included in order to provide 50% of the protein of the diet. The soluble fraction has higher degree of hydrolysis (20.1%) compared to the insoluble fraction (9.97%). The two diets containing the hydrolysate soluble fraction were the most consumed. With 5 hours of evaluation, the diet containing the hydrolysate soluble fraction increased the excretion of ammonia in relation to diet containing the insoluble fraction. After 25 hours, the soluble fraction also increases the excretion of ammonia but this time in relation to the diet containing a combination of two fractions. It was concluded that the inclusion of the sardine protein hydrolysate soluble fraction in the diet stimulates the silver catfish feed intake, but when inclusion is high it can increase ammonia excretion of juvenile silvercatfish.
DOI: 10.6084/m9.figshare.19968467.v1
title: Soluble and insoluble fractions of the sardine waste protein hydrolysate in silver catfish feeding: feed intake and excretion of ammonia

description: ABSTRACT The fish protein hydrolysate is produced by the enzymatic hydrolysis of seafood industry wastes, resulting in a high quality ingredient to be used in fish feed. The aim of this study was to determine the effect of the fractions of the sardine protein waste hydrolysate fractions on feed intake and ammonia excretion of silver catfish. The soluble and insoluble fractions of the sardine muscle hydrolysate, evaluated individually and in combination were tested. Juvenile silver catfish (9.76±0.55g) were divided into twelve 20L aquaria, in the density of four fish per tank, resulting in an average biomass of 1.90±0.17g/L. The protein hydrolysate was produced with fresh sardine carcasses using the enzyme Protamex(r) bacterial protease (Novozymes A/S) and soluble and insoluble fractions were derived. The diets were isonitrogenous (39% CP) and isocaloric (4450kcal EB/kg) and the hydrolysate fractions were included in order to provide 50% of the protein of the diet. The soluble fraction has higher degree of hydrolysis (20.1%) compared to the insoluble fraction (9.97%). The two diets containing the hydrolysate soluble fraction were the most consumed. With 5 hours of evaluation, the diet containing the hydrolysate soluble fraction increased the excretion of ammonia in relation to diet containing the insoluble fraction. After 25 hours, the soluble fraction also increases the excretion of ammonia but this time in relation to the diet containing a combination of two fractions. It was concluded that the inclusion of the sardine protein hydrolysate soluble fraction in the diet stimulates the silver catfish feed intake, but when inclusion is high it can increase ammonia excretion of juvenile silvercatfish.
DOI: 10.6084/m9.figshare.19968468.v1
title: Reproductive behavior of crossbred dairy cows grazing an intensive silvopastoral system under tropical dry forest conditions

description: ABSTRACT It is widely accepted that selection for high milk yield in dairy cows has negatively affected their reproductive performance. After calving, dairy cows experience a nutritional imbalance due to an asynchrony in the occurrence of the lactation and dry matter intake peaks. In the tropics, this situation is exacerbated due to poor quality and/ or availability of the diet. A study was carried out to describe the nutritional and reproductive behavior of two-to-four parturition crossbred cows (Gyr (Bos indicus) x Holstein (Bos taurus)) divided in two groups according to their calving to first service interval (CFSI): Group 1: ≤50 days CFSI, n=7; Group 2: ≥50 days CFSI, n=8. Animals were grazing in an intensive silvopastoral system (ISS) based on Leucaena leucocephala and Cynodon plectostachyus and also received protein, energy and mineral supplementation. Dry matter (DMI) and nutrient intake were individually estimated and correlations between reproductive and nutritional parameters were performed. Additionally, serum progesterone concentration was monitored. Group 2 had greater forage and total DMI and milk production than Group 1 (P&lt;0.05). Hence, Group 2 had greater nutrient intake from forages than Group 1 (P&lt;0.05). Group 1 had a positive nutritional balance and an optimum reproductive performance compared to Group 2, which had a negative energy balance and lengthier days with open intervals (P&lt;0.05). It was corroborated that protein and energy are required in adequate levels, to ensure that uterus undergoes involution correctly and ovarian activity starts soon in the postpartum period.
DOI: 10.6084/m9.figshare.19968468
title: Reproductive behavior of crossbred dairy cows grazing an intensive silvopastoral system under tropical dry forest conditions

description: ABSTRACT It is widely accepted that selection for high milk yield in dairy cows has negatively affected their reproductive performance. After calving, dairy cows experience a nutritional imbalance due to an asynchrony in the occurrence of the lactation and dry matter intake peaks. In the tropics, this situation is exacerbated due to poor quality and/ or availability of the diet. A study was carried out to describe the nutritional and reproductive behavior of two-to-four parturition crossbred cows (Gyr (Bos indicus) x Holstein (Bos taurus)) divided in two groups according to their calving to first service interval (CFSI): Group 1: ≤50 days CFSI, n=7; Group 2: ≥50 days CFSI, n=8. Animals were grazing in an intensive silvopastoral system (ISS) based on Leucaena leucocephala and Cynodon plectostachyus and also received protein, energy and mineral supplementation. Dry matter (DMI) and nutrient intake were individually estimated and correlations between reproductive and nutritional parameters were performed. Additionally, serum progesterone concentration was monitored. Group 2 had greater forage and total DMI and milk production than Group 1 (P&lt;0.05). Hence, Group 2 had greater nutrient intake from forages than Group 1 (P&lt;0.05). Group 1 had a positive nutritional balance and an optimum reproductive performance compared to Group 2, which had a negative energy balance and lengthier days with open intervals (P&lt;0.05). It was corroborated that protein and energy are required in adequate levels, to ensure that uterus undergoes involution correctly and ovarian activity starts soon in the postpartum period.
DOI: 10.6084/m9.figshare.19968470
title: Eletrocardiographic monitoring in the development of Wistar Rats

description: ABSTRACT The cardiac electrical activity can be recorded through the electrocardiogram (ECG), this recording is able to capture the changes in the electric route. In the scientific literature, there is no description of electrocardiographic patterns of Wistar rats at the stage of newborn to be considered aged. The aim of this study was to evaluate the electrocardiographic pattern of Wistar rats at various stages of growth, in order for the results to contribute as a standard reference. Rattus norvegicus albinus rats of the Wistar lineage were used. The rats were divided into 5 experimental groups being defined according to age and named as follows: group 21 days (21D), 2 months (2M), 3 months (3M), 7 months (7M) and 18 months (18M), where n = 20 per group. For the realization of ECG, electrodes connected to the electrocardiograph channels were positioned in animals to capture the electrical signal of the heart in 6-lead. The data were grouped and subjected to comparison by ANOVA and Tukey-Kramer test, P=0.05. The results showed that, overall, the modulations along the front aging process, related to the ECG, are initiated from 2M period, apparent stability by 3M and/or 7M, followed by exacerbation of modulations in 7M and/or 18M, depending on the electrocardiographic variable in question. Front of heart rate (HR), concomitantly, there is a similar pattern, that is, decreasing from 2M period with stability until 7M, followed by more pronounced decrease in 18M. The results suggest that due to the aging process, the heart of Wistar rats shows changes in the conduction of electrical stimulation and reduction in heart rate, factors that deserve attention as indicators of inclusion / exclusion of animals in experimental groups by researchers using that species as a model.