Sensorial and fatty acid profile of ice cream manufactured with milk of crossbred cows fed palm oil and coconut fat.

This work was carried out to study the nutritional quality of milk of cows fed palm oil (PAL) or coconut fat (COC), and the use of that milk as raw material for ice cream production. Three treatments were tested with 23 healthy cows: control (CON), PAL, and COC. The milk was collected at d 21 and 36 of the experimental diet. Proximate composition (moisture, ash, fat, protein, and carbohydrates) and fatty acid composition were evaluated on milk and ice cream, and sensorial analysis, color (lightness, green/red, and blue/yellow), overrun, and texture were evaluated on the ice cream. Fatty acids present in milk and ice cream were determined by gas chromatography. Sensory analysis results showed that the ice cream acceptability index was above 70%. No difference was observed for proximate composition in milk and ice cream. Chromatographic analysis showed an increase in saturated fatty acid concentration in CON and lower levels in PAL; polyunsaturated fatty acid concentration was higher in PAL and lower in CON, in milk and ice cream; monounsaturated fatty acid concentration in milk was higher in PAL and lower in CON but no difference was found in ice cream. Comparing n-3 content in milk and ice cream, we observed that PAL had higher levels than CON and COC. The results indicate that it is feasible to add sources of fat to the animal feed for fatty acid composition modulation of milk and ice cream.

Eletrocardiografia contínua (Holter) em cães saudáveis submetidos a diferentes exercícios físicos / Ambulatory electrocardiography (Holter) in healthy dogs submitted to different physical exercises

O presente trabalho teve como objetivo avaliar os efeitos de diferentes cargas de exercícios físicos no comportamento da frequência e do ritmo cardíaco de cães saudáveis, ao longo das 24 horas de gravação Holter. Utilizaram-se 23 cães, sem restrição de sexo, idade ou raça, dos quais 15 foram submetidos a atividades físicas e pertenciam ao grupo controle. Os resultados mostraram alterações na frequência cardíaca durante as atividades propostas, em que se alcançaram 174±27bpm durante a caminhada leve, 148±30 durante a atividade com bola e 165±26 durante o Cooper. Ademais, observaram-se arritmias, incluindo bloqueios atrioventriculares e extrassístoles e maior número e duração de pausas (até 5s) em repouso, além de uma menor variação na frequência cardíaca (FC) durante o período de sono dos animais do grupo experimental. Esses eventos não foram observados no grupo controle, o que sugere que o exercício físico extenuante interfere na modulação autonômica do coração, podendo predispor a arritmias importantes.(AU)

This study aimed to evaluate the effects of different loads of exercises on the heart rate behavior and rhythm in healthy dogs, over the 24-hour Holter recording. Twenty-three dogs were used without gender, age or breed restriction, and 15 animals were submitted to physical activities and 8 were used as control group. The results showed changes in heart rate during the proposed activities, with 174±27 bpm while walking, 148±30 during ball activity and 165±26 during Cooper. Moreover, arrhythmias were observed, including atrioventricular blocks and premature complexes and a larger number and duration of pauses (up to 5 sec) at rest, and provided a smaller variation in the HR during the sleep period of animals from the experimental group. These events were not observed in the control group, suggesting that strenuous physical exercise affects the autonomic modulation of the heart, and may lead to important arrhythmias.(AU)

Eletrocardiografia contínua (Holter) em cães saudáveis submetidos a diferentes exercícios físicos / Ambulatory electrocardiography (Holter) in healthy dogs submitted to different physical exercises

O presente trabalho teve como objetivo avaliar os efeitos de diferentes cargas de exercícios físicos no comportamento da frequência e do ritmo cardíaco de cães saudáveis, ao longo das 24 horas de gravação Holter. Utilizaram-se 23 cães, sem restrição de sexo, idade ou raça, dos quais 15 foram submetidos a atividades físicas e pertenciam ao grupo controle. Os resultados mostraram alterações na frequência cardíaca durante as atividades propostas, em que se alcançaram 174±27bpm durante a caminhada leve, 148±30 durante a atividade com bola e 165±26 durante o Cooper. Ademais, observaram-se arritmias, incluindo bloqueios atrioventriculares e extrassístoles e maior número e duração de pausas (até 5s) em repouso, além de uma menor variação na frequência cardíaca (FC) durante o período de sono dos animais do grupo experimental. Esses eventos não foram observados no grupo controle, o que sugere que o exercício físico extenuante interfere na modulação autonômica do coração, podendo predispor a arritmias importantes.

This study aimed to evaluate the effects of different loads of exercises on the heart rate behavior and rhythm in healthy dogs, over the 24-hour Holter recording. Twenty-three dogs were used without gender, age or breed restriction, and 15 animals were submitted to physical activities and 8 were used as control group. The results showed changes in heart rate during the proposed activities, with 174±27 bpm while walking, 148±30 during ball activity and 165±26 during Cooper. Moreover, arrhythmias were observed, including atrioventricular blocks and premature complexes and a larger number and duration of pauses (up to 5 sec) at rest, and provided a smaller variation in the HR during the sleep period of animals from the experimental group. These events were not observed in the control group, suggesting that strenuous physical exercise affects the autonomic modulation of the heart, and may lead to important arrhythmias.

Efeito da associação de furosemida e fenilbutazona sobre variáveis hidroeletrolíticas de cavalos antes e após a corrida / The effect of furosemide and phenylbutazone association on the fluid and electrolyte characteristics of horses before and after a race

Verificaram-se os efeitos da associação de furosemida e fenilbutazona sobre variáveis hidroeletrolíticas de cavalos antes e após a corrida. Dezenove equinos foram distribuídos em três grupos, de acordo com os protocolos de tratamento. O primeiro grupo, de cinco animais, não recebeu medicação (grupo-controle); o segundo grupo, de sete animais, foi tratado com furosemida, na dose de 1mg/kg, por via intramuscular, até quatro horas antes do páreo; o terceiro, de sete animais, recebeu furosemida, por via intramuscular, e fenilbutazona, por via intravenosa, nas doses de 1,0 e 4,4mg/kg, respectivamente, até quatro horas antes da corrida. Amostras de sangue foram colhidas antes, imediatamente após e duas horas após o páreo, para avaliação da osmolalidade plasmática e das concentrações plasmáticas de sódio, potássio e cloreto. A utilização de furosemida e da associação furosemida e fenilbutazona até 4h antes dos páreos nas dosagens descritas alterou (P<0,05) a osmolalidade plasmática dos equinos, mas não alterou (P>0,05) as concentrações de sódio, potássio e cloreto. Os páreos alteraram de forma fisiológica a osmolalidade plasmática e a concentração sanguínea de K+ devido ao exercício de alta intensidade.(AU)

The objective of this study was to verify the effects of furosemide and phenylbutazone association on fluid and electrolyte balance characteristics of horses before and after a race. Nineteen horses were divided into three groups according to treatment protocols. The first group (five animals - control) was not medicated. A second group (seven animals) was treated with furosemide (1mg/kg, intramuscular up to four hours before the race). A third group (seven animals) received furosemide (1mg/kg) and phenylbutazone (4.4mg/kg), both intramuscular, up to four hours before race. Blood samples were collected before, immediately after and two hours after a race to evaluate the plasma osmolality and sodium, potassium and chloride concentrations. The use of furosemide and furosemide plus phenylbutazone up to four hours before the race altered (P<0.05) the plasma osmolality but did not change (P>0.05) the sodium, potassium and chloride concentrations. It was not possible to determine an antagonist effect of phenylbutazone on furosemide, based on fluid and electrolyte balance. Due to the high intensity exercise, the increase in plasma osmolality and potassium concentration was attributed to the race effect.(AU)

Efeito da associação de furosemida e fenilbutazona sobre variáveis hidroeletrolíticas de cavalos antes e após a corrida / The effect of furosemide and phenylbutazone association on the fluid and electrolyte characteristics of horses before and after a race

Verificaram-se os efeitos da associação de furosemida e fenilbutazona sobre variáveis hidroeletrolíticas de cavalos antes e após a corrida. Dezenove equinos foram distribuídos em três grupos, de acordo com os protocolos de tratamento. O primeiro grupo, de cinco animais, não recebeu medicação (grupo-controle); o segundo grupo, de sete animais, foi tratado com furosemida, na dose de 1mg/kg, por via intramuscular, até quatro horas antes do páreo; o terceiro, de sete animais, recebeu furosemida, por via intramuscular, e fenilbutazona, por via intravenosa, nas doses de 1,0 e 4,4mg/kg, respectivamente, até quatro horas antes da corrida. Amostras de sangue foram colhidas antes, imediatamente após e duas horas após o páreo, para avaliação da osmolalidade plasmática e das concentrações plasmáticas de sódio, potássio e cloreto. A utilização de furosemida e da associação furosemida e fenilbutazona até 4h antes dos páreos nas dosagens descritas alterou (P<0,05) a osmolalidade plasmática dos equinos, mas não alterou (P>0,05) as concentrações de sódio, potássio e cloreto. Os páreos alteraram de forma fisiológica a osmolalidade plasmática e a concentração sanguínea de K+ devido ao exercício de alta intensidade.

The objective of this study was to verify the effects of furosemide and phenylbutazone association on fluid and electrolyte balance characteristics of horses before and after a race. Nineteen horses were divided into three groups according to treatment protocols. The first group (five animals - control) was not medicated. A second group (seven animals) was treated with furosemide (1mg/kg, intramuscular up to four hours before the race). A third group (seven animals) received furosemide (1mg/kg) and phenylbutazone (4.4mg/kg), both intramuscular, up to four hours before race. Blood samples were collected before, immediately after and two hours after a race to evaluate the plasma osmolality and sodium, potassium and chloride concentrations. The use of furosemide and furosemide plus phenylbutazone up to four hours before the race altered (P<0.05) the plasma osmolality but did not change (P>0.05) the sodium, potassium and chloride concentrations. It was not possible to determine an antagonist effect of phenylbutazone on furosemide, based on fluid and electrolyte balance. Due to the high intensity exercise, the increase in plasma osmolality and potassium concentration was attributed to the race effect.

Hepatite granulomatosa em bovino causada por Mycobacterium avium subsp. paratuberculosis / Granulomatous hepatitis in cattle caused by Mycobacterium avium subsp. paratuberculosis

Samples from intestines, liver, and lymph nodes were collected from a dairy steer with clinical suspicion of paratuberculosis. The samples were processed for histologic examination with hematoxylin-eosin and Zihel-Neelsen (ZN) staining for the detection of acid-fast bacilli (AFB), and submitted to immunohistochemistry (IHC). Macroscopic changes were observed in the small intestines, with thickening and corrugation of the mucosa. The main microscopic changes were found in small intestines, lymph vessels in the mesentery, and mesenteric lymph nodes characterized by enteritis, lymphangiectasia, and lymphadenitis. Liver presented with granulomatous hepatitis, an uncommon histopathological feature for paratuberculosis. The clinical features associated with positive culture of Mycobacterium avium subsp. paratuberculosis and detection of AFB by ZN and IHC in the cytoplasm of macrophages (epithelioid) in the intestinal mucosa and submucosa, lymph nodes, and liver were important to confirm the diagnosis of paratuberculosis.(AU)

Hepatite granulomatosa em bovino causada por Mycobacterium avium subsp. paratuberculosis / Granulomatous hepatitis in cattle caused by Mycobacterium avium subsp. paratuberculosis

Samples from intestines, liver, and lymph nodes were collected from a dairy steer with clinical suspicion of paratuberculosis. The samples were processed for histologic examination with hematoxylin-eosin and Zihel-Neelsen (ZN) staining for the detection of acid-fast bacilli (AFB), and submitted to immunohistochemistry (IHC). Macroscopic changes were observed in the small intestines, with thickening and corrugation of the mucosa. The main microscopic changes were found in small intestines, lymph vessels in the mesentery, and mesenteric lymph nodes characterized by enteritis, lymphangiectasia, and lymphadenitis. Liver presented with granulomatous hepatitis, an uncommon histopathological feature for paratuberculosis. The clinical features associated with positive culture of Mycobacterium avium subsp. paratuberculosis and detection of AFB by ZN and IHC in the cytoplasm of macrophages (epithelioid) in the intestinal mucosa and submucosa, lymph nodes, and liver were important to confirm the diagnosis of paratuberculosis.

Genetic analysis of LRRK2 functional domains in Brazilian patients with Parkinson's disease.

BACKGROUND AND PURPOSE: Mutations in the leucine-rich repeat kinase 2 gene (LRRK2) have been associated with Parkinson's disease (PD), and the majority of the pathogenic variants are located in the ROC and MAPKKK domains. METHODS: Exons 29-31 and 38-44 (ROC and MAPKKK domains) were sequenced in 204 patients with PD, mostly Brazilian. RESULTS: We identified four polymorphisms, a novel silent variant p.R1398R and four substitutions: p.T1410M, p.G2019S, p.Y2189C and the novel variant p.C2139S. CONCLUSIONS: The most prevalent mutation was the p.G2019S (2.4%). We consider that the p.T1410M and the p.Y2189C variants are probably polymorphisms and that the p.C2139S mutation is potentially pathogenic.

Sodium fluoride and chlorhexidine effect in the inhibition of mutans streptococci in children with dental caries: a randomized, double-blind clinical trial.

OBJECTIVE: We aimed to compare the effect of sodium fluoride and chlorhexidine on salivary levels of mutans streptococci (MS), in a double-blind, randomized clinical trial. METHODS: Thirty-five healthy volunteers, aged 4-8 years, with at least one active carious lesion and no previous history of allergies were selected to participate in the study. A gel formulation containing either 1.23% sodium fluoride or 1% chlorhexidine was topically administered to the dentition every 24 h for 6 consecutive days. Salivary MS levels were measured at baseline (D1) and on the 6th (D6), 15th (D15), and 30th (D30) days. For microbiological analysis, Mitis Salivarius-Bacitracin agar medium was used. RESULTS: Difference between treatments was only verified on D6. On the last day of treatment 1% chlorhexidine gel was significantly more effective than fluoride (P = 0.0000). The use of sodium fluoride did not cause a statistically significant variation in salivary MS levels throughout the duration of the study. Following treatment, a subsequent increase in MS counts between D6 and D15 (P = 0.0001) was observed with chlorhexidine. CONCLUSION: A 6-day treatment with a 1% chlorhexidine gel was effective in reducing salivary MS; there was a significant MS increase once treatment was suspended. The use of 1.23% sodium fluoride under the same regimen was not able to reduce salivary MS levels. Our results suggest repeated treatment with 1% chlorhexidine as a means for maintaining low salivary MS levels in children with dental caries.

Reproduction of Blue-black Grassquits in central Brazil.

During the reproductive season Blue-black grassquit (Volatinia jacarina) males are found in clusters, wherein they exhibit a distinctive display that consists of repeated, vertical leaps while simultaneously producing a brief vocalization. The main objective of this study was to describe details of the species' reproductive behavior in a "Cerrado" area of central Brazil and compare these data with some studies carried out in other areas. The data obtained concerning different aspects of nesting, laying and hatching were generally similar to those obtained in previous studies in other areas. However, we found that the typical clutch size of two eggs per nest is lower, and egg and nestling mortality rates higher in our area than what has been reported elsewhere. Our results suggest that males differ in time expended with different activities according to their reproductive condition and also provide extensive parental care. We found that display execution rates peak in the early morning and in the late afternoon and are higher in the middle of the breeding season. We also found that there is an inverse relation between the height of the display leap and the height of the perch.

Lippia sidoides and Myracrodruon urundeuva gel prevents alveolar bone resorption in experimental periodontitis in rats.

In Brazilian folk medicine, Lippia sidoides (Ls) and Myracrodruon urundeuva (Mu) have gained popularity and reputation as effective antimicrobial and anti-inflammatory agents. This work aimed to evaluate the effect of topical herbal gel from Ls 0.5% (v/w) and Mu 5% (w/w) in experimental periodontal disease (EPD) in rats. Wistar rats were subjected to ligature placement around the second upper left molars. Animals were treated topically with Ls and/or Mu-based gel, immediately after EPD induction and three times/day for 11 days until the rats were sacrificed (11th day). Saline-based gel was utilized as control for all experiments and doxycycline based gel 10% (w/w) was utilized as reference substance. Animals were weighed daily. Alveolar bone loss was measured as the difference (in millimeters) between the cusp tip and the alveolar bone. The periodontum and the surrounding gingivae were examined at histopathology, as well as the neutrophil influx into the gingivae was assayed using myeloperoxidase activity and cytokine production mainly tumor necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta) levels by ELISA method. The local bacterial flora was assessed through culture of the gingival tissue in standard aerobic and anaerobic media. Alveolar bone loss was significantly inhibited by Ls and Mu combined treatment compared to the saline control group. Ls and Mu combined treatment reduced tissue lesion at histopathology, with partial preservation of the periodontum, coupled to decreased myeloperoxidase activity as well as significantly inhibited TNF-alpha and IL-1beta production in gingival tissue compared to the saline control group. Ls and Mu combined treatment also prevented the growth of oral microorganisms and the weight loss. Ls and Mu combined based gel treatment preserved alveolar bone resorption and demonstrated anti-inflammatory and antibacterial activities in experimental periodontitis.

Genetic variability in maned wolf based on heterologous short-tandem repeat markers from domestic dog.

The maned wolf (Chrysocyon brachyurus) is the largest South American canid. Habitat loss and fragmentation, due to agricultural expansion and predatory hunting, are the main threats to this species. It is included in the official list of threatened wildlife species in Brazil, and is also protected by IUCN and CITES. Highly variable genetic markers such as microsatellites have the potential to resolve genetic relationships at all levels of the population structure (among individuals, demes or metapopulations) and also to identify the evolutionary unit for strategies for the conservation of the species. Tests were carried out to verify whether a class of highly polymorphic tetranucleotide repeats described for the domestic dog effectively amplifies DNA in the maned wolf. All five loci studied were amplified; however, one of these, was shown to be monomorphic in 69 maned wolf samples. The average allele number and estimated heterozygosity per polymorphic locus were 4.3 and 67%, respectively. The genetic variability found for this species, which is considered threatened with extinction, showed similar results when compared to studies of other canids.

Reproduction of Blue-black Grassquits in central Brazil

During the reproductive season Blue-black grassquit (Volatinia jacarina) males are found in clusters, wherein they exhibit a distinctive display that consists of repeated, vertical leaps while simultaneously producing a brief vocalization. The main objective of this study was to describe details of the species' reproductive behavior in a "Cerrado" area of central Brazil and compare these data with some studies carried out in other areas. The data obtained concerning different aspects of nesting, laying and hatching were generally similar to those obtained in previous studies in other areas. However, we found that the typical clutch size of two eggs per nest is lower, and egg and nestling mortality rates higher in our area than what has been reported elsewhere. Our results suggest that males differ in time expended with different activities according to their reproductive condition and also provide extensive parental care. We found that display execution rates peak in the early morning and in the late afternoon and are higher in the middle of the breeding season. We also found that there is an inverse relation between the height of the display leap and the height of the perch.

Durante a estação reprodutiva, machos de tiziu (Volatinia jacarina) são encontrados agregados e apresentam uma exibição bastante conspícua, que consiste de saltos verticais associados a uma curta vocalização. Através de observações realizadas em uma área de Cerrado na região do Brasil central, este trabalho teve como objetivos detalhar alguns aspectos da biologia reprodutiva de V. jacarina e comparar tais dados com os poucos trabalhos existentes sobre a espécie. Os dados obtidos neste estudo com relação aos diferentes aspectos da nidificação, postura e eclosão dos ovos se mostraram semelhantes, em geral, àqueles encontrados em estudos anteriores, diferindo apenas com relação ao número de ovos por ninho (a maioria dos ninhos com apenas dois ovos) e às taxas de predação, que se mostraram mais elevadas. Os dados mostram ainda que machos variam com relação ao gasto de tempo com diferentes atividades de acordo com a condição reprodutiva e que os mesmos investem parentalmente. Foram encontradas ainda, que as taxas de execução de exibição são mais elevadas no início da manhã e no final da tarde, assim como também tem um pico no meio da estação reprodutiva. Encontramos também uma relação inversa entre a altura do salto da exibição e a altura do poleiro.

Genetic variability in maned wolf based on heterologous short-tandem repeat markers from domestic dog

The maned wolf (Chrysocyon brachyurus) is the largest South American canid. Habitat loss and fragmentation, due to agricultural expansion and predatory hunting, are the main threats to this species. It is included in the official list of threatened wildlife species in Brazil, and is also protected by IUCN and CITES. Highly variable genetic markers such as microsatellites have the potential to resolve genetic relationships at all levels of the population structure (among individuals, demes or metapopulations) and also to identify the evolutionary unit for strategies for the conservation of the species. Tests were carried out to verify whether a class of highly polymorphic tetranucleotide repeats described for the domestic dog effectively amplifies DNA in the maned wolf. All five loci studied were amplified; however, one of these, was shown to be monomorphic in 69 maned wolf samples. The average allele number and estimated heterozygosity per polymorphic locus were 4.3 and 67%, respectively. The genetic variability found for this species, which is considered threatened with extinction, showed similar results when compared to studies of other canids.

Perfil de isolamento microbiano em cães com otite média e externa associadas / Profile of microorganisms isolated from dogs with associated media and extern otitis

Comparou-se o perfil de isolamento microbiano de amostras coletadas de cães com otite média (OM) e externa (OE) associadas. Sessenta e quatro cães com otite média e externa foram avaliados durante 10 meses. Amostras dos condutos auditivos externos foram coletadas com auxílio de swabs estéreis e aquelas do ouvido médio pela técnica cirúrgica da osteotomia da bula timpânica. Os microrganismos foram cultivados e identificados de acordo com os métodos previamente descritos, e a susceptibilidade a antimicrobianos avaliada pelo método de difusão em ágar estabelecido pelo National Committee for Clinical Laboratory Standards. Bactérias anaeróbias estritas não foram isoladas em qualquer amostra. Todas as amostras de OE mostraram crescimento bacteriano e/ou fúngico. Na OM, a positividade nas culturas foi de 48%. Os microrganismos mais isolados na OE foram: Bacillus sp. (26,9%), M. pachydermatis (22,2%) e S. intermedius (21,7%); na OM foram: S. intermedius (32,5%), S. aureus subsp. aureus (22,5%) e bacilos Gram-negativos não fermentadores (10,0%). Observou-se alguma diferença no perfil de isolamento entre os quadros de OM e OE em 96,7% dos animais. Verificou-se elevada resistência de cepas de S. intermedius à penicilina G, ampicilina, eritromicina, tetraciclina e clindamicina.(AU)

The isolation pattern of samples collected from dogs with both media (OM) and extern otitis (OE) was compared. Sixty-four dogs suffering from those conditions were studied over a 10-month period. Samples from the external ear were collected with sterile swabs while those from the middle ear were collected by osteotomy of the tympanic bulla. The microorganisms were cultured and identified according to methods previously described and to the susceptibility of antimicrobials according to the National Committee for Clinical Laboratory Standards agar diffusion test. Anaerobic bacteria were not isolated in any sample. All samples from OE showed bacterial and/or fungal growth. Concerning media otitis, this percentage was 48%. The most common microorganisms isolated from OE were Bacillus sp. (26.9%), M. pachydermatis (22.2%) and S. intermedius (21.7%) and those from OM were S. intermedius (32.5%), S. aureus subsp. aureus (22.5%) and non-fermentative Gram-negative rods (10.0%). Some difference was observed in the isolation pattern between media and extern otitis in 96.7% of the animals. High resistance rates of S. intermedius strains to penicillin G, ampicillin, erythromycin, tetracycline and clindamycin were found.(AU)

Perfil de isolamento microbiano em cães com otite média e externa associadas / Profile of microorganisms isolated from dogs with associated media and extern otitis

Comparou-se o perfil de isolamento microbiano de amostras coletadas de cães com otite média (OM) e externa (OE) associadas. Sessenta e quatro cães com otite média e externa foram avaliados durante 10 meses. Amostras dos condutos auditivos externos foram coletadas com auxílio de swabs estéreis e aquelas do ouvido médio pela técnica cirúrgica da osteotomia da bula timpânica. Os microrganismos foram cultivados e identificados de acordo com os métodos previamente descritos, e a susceptibilidade a antimicrobianos avaliada pelo método de difusão em ágar estabelecido pelo National Committee for Clinical Laboratory Standards. Bactérias anaeróbias estritas não foram isoladas em qualquer amostra. Todas as amostras de OE mostraram crescimento bacteriano e/ou fúngico. Na OM, a positividade nas culturas foi de 48 por cento. Os microrganismos mais isolados na OE foram: Bacillus sp. (26,9 por cento), M. pachydermatis (22,2 por cento) e S. intermedius (21,7 por cento); na OM foram: S. intermedius (32,5 por cento), S. aureus subsp. aureus (22,5 por cento) e bacilos Gram-negativos não fermentadores (10,0 por cento). Observou-se alguma diferença no perfil de isolamento entre os quadros de OM e OE em 96,7 por cento dos animais. Verificou-se elevada resistência de cepas de S. intermedius à penicilina G, ampicilina, eritromicina, tetraciclina e clindamicina.

The isolation pattern of samples collected from dogs with both media (OM) and extern otitis (OE) was compared. Sixty-four dogs suffering from those conditions were studied over a 10-month period. Samples from the external ear were collected with sterile swabs while those from the middle ear were collected by osteotomy of the tympanic bulla. The microorganisms were cultured and identified according to methods previously described and to the susceptibility of antimicrobials according to the National Committee for Clinical Laboratory Standards agar diffusion test. Anaerobic bacteria were not isolated in any sample. All samples from OE showed bacterial and/or fungal growth. Concerning media otitis, this percentage was 48 percent. The most common microorganisms isolated from OE were Bacillus sp. (26.9 percent), M. pachydermatis (22.2 percent) and S. intermedius (21.7 percent) and those from OM were S. intermedius (32.5 percent), S. aureus subsp. aureus (22.5 percent) and non-fermentative Gram-negative rods (10.0 percent). Some difference was observed in the isolation pattern between media and extern otitis in 96.7 percent of the animals. High resistance rates of S. intermedius strains to penicillin G, ampicillin, erythromycin, tetracycline and clindamycin were found.

Osmolalidade plasmática e osmol gap em eqüinos desidratados experimentalmente / Plasma osmolality and osmol gap in equines experimentally dehydrated

Dez eqüinos foram avaliados durante um processo de indução de desidratação para a avaliação da osmolalidade plasmática calculada (OPC), da osmolalidade plasmática mensurada (OPM) e do osmol gap. A desidratação foi induzida pela administração de furosemida, na dose de 1,0mg/kg, por via intravenosa, sendo utilizadas três aplicações (às 7, 15 e 23 horas) no primeiro dia de indução associada a jejum hídrico e alimentar com duração de 72 horas. Amostras de sangue foram colhidas para análises laboratoriais nas 0, 12ª, 24ª, 36ª, 48ª, 60ª e 72ª horas do período experimental. A osmolalidade plasmática foi determinada por mensuração direta (OPM) utilizando-se osmômetro e pela determinação das concentrações sangüíneas de sódio, potássio, glicose, uréia e OPC. Houve desidratação hipertônica leve e a OPC não foi eficiente em estimar a OPM em eqüinos desidratados. O osmol gap foi útil na avaliação de substâncias osmoticamente ativas não-mensuráveis no sangue.(AU)

Ten equines were experimentally dehydrated. Plasma osmolality calculated (POC), plasma osmolality measured (POM) and osmol gap were evaluated. The dehydration was induced by furosemide 1mg/kg bodyweight, intravenous injection (three applications at 7 a.m., 3 p.m. and 11 p.m.) in the first 24 hours associated to 72 hours of food and water fasting. Blood was sampled at 0, 12, 24, 36, 48, 60 and 72 hours of experiment. Plasma osmolality was evaluated by two ways: osmometry (POM) and the evaluation of sodium, potassium, glucose and urea concentrations in blood (POC). The osmol gap was calculated subtracting the values of POC from POM. According to the results, the equines presented mild hypertonic dehydration. POC was not efficient to estimate POM in dehydrated equines. Osmol gap was useful to determinate the presence of unmeasured osmotically active substances in blood.(AU)

Osmolalidade plasmática e osmol gap em eqüinos desidratados experimentalmente / Plasma osmolality and osmol gap in equines experimentally dehydrated

Dez eqüinos foram avaliados durante um processo de indução de desidratação para a avaliação da osmolalidade plasmática calculada (OPC), da osmolalidade plasmática mensurada (OPM) e do osmol gap. A desidratação foi induzida pela administração de furosemida, na dose de 1,0mg/kg, por via intravenosa, sendo utilizadas três aplicações (às 7, 15 e 23 horas) no primeiro dia de indução associada a jejum hídrico e alimentar com duração de 72 horas. Amostras de sangue foram colhidas para análises laboratoriais nas 0, 12ª, 24ª, 36ª, 48ª, 60ª e 72ª horas do período experimental. A osmolalidade plasmática foi determinada por mensuração direta (OPM) utilizando-se osmômetro e pela determinação das concentrações sangüíneas de sódio, potássio, glicose, uréia e OPC. Houve desidratação hipertônica leve e a OPC não foi eficiente em estimar a OPM em eqüinos desidratados. O osmol gap foi útil na avaliação de substâncias osmoticamente ativas não-mensuráveis no sangue.

Ten equines were experimentally dehydrated. Plasma osmolality calculated (POC), plasma osmolality measured (POM) and osmol gap were evaluated. The dehydration was induced by furosemide 1mg/kg bodyweight, intravenous injection (three applications at 7 a.m., 3 p.m. and 11 p.m.) in the first 24 hours associated to 72 hours of food and water fasting. Blood was sampled at 0, 12, 24, 36, 48, 60 and 72 hours of experiment. Plasma osmolality was evaluated by two ways: osmometry (POM) and the evaluation of sodium, potassium, glucose and urea concentrations in blood (POC). The osmol gap was calculated subtracting the values of POC from POM. According to the results, the equines presented mild hypertonic dehydration. POC was not efficient to estimate POM in dehydrated equines. Osmol gap was useful to determinate the presence of unmeasured osmotically active substances in blood.

Antibacterial activity of the essential oil from Lippia aff. gracillis.

The essential oil of fresh leaves of Lippia aff. gracillis was analyzed by GC/MS and evaluated for its antibacterial effects. The results showed a moderate antibacterial activity and confirm the traditional uses of L. aff. gracillis.