Caracterização microbiológica de carcaças de frangos de corte produzidas no estado de Minas Gerais / Microbiological characterization of broiler carcasses produced in the state of Minas Gerais

In order to evaluate the microbiological quality of broiler chickens produced in Minas Gerais State, 240 samples of broiler carcasses from the five regions of the Minas Gerais State were collected, by official inspection services, for one year. The samples were submitted to counts of total and thermotolerant coliforms, coagulase-positive and negative Staphylococcus, besides Campylobacter spp., Listeria monocytogenes, E.coli O157:H7, and Salmonella spp. resource. The results showed the presence of total and thermotolerant coliforms in 34.2% and 13.5% of broiler carcasses evaluated, respectively. All tested samples were positive for Staphylococcus spp., 9.1% for Salmonella spp., 15.5% for Listeria monocytogenes, and 2.1% for Campylobacter spp. E.coli O157:H7 was not isolated from the samples.(AU)

Validation of an HPLC-UV method for the identification and quantification of bioactive amines in chicken meat / Validação de metodologia por HPLC/UV para identificação e quantificação de aminas bioativas em carne de frango de corte

A high-performance liquid chromatography with ultraviolet detection (HPLC-UV) method was validated for the study of bioactive amines in chicken meat. A gradient elution system with an ultraviolet detector was used after extraction with trichloroacetic acid and pre-column derivatization with dansyl chloride. Putrescine, cadaverine, histamine, tyramine, spermidine, and spermine standards were used for the evaluation of the following performance parameters: selectivity, linearity, precision, recovery, limits of detection, limits of quantification and ruggedness. The results indicated excellent selectivity, separation of all amines, a coefficient of determination greater than 0.99 and recovery from 92.25 to 102.25% at the concentration of 47.2mg.kg-1, with a limit of detection at 0.3mg.kg-1 and a limit of quantification at 0.9mg.kg-1 for all amines, with the exception of histamine, which exhibited the limit of quantification, of 1mg.kg-1. In conclusion, the performance parameters demonstrated adequacy of the method for the detection and quantification of bioactive amines in chicken meat.(AU)

Um método de cromatografia líquida de alta eficiência (CLAE) para pesquisa de aminas bioativas em carne de frango foi validado. Foi utilizado um sistema de gradiente de eluição com detector ultravioleta, após extração com ácido tricloroacético e derivação pré-coluna com cloreto de dansila. Os padrões de putrescina, cadaverina, histamina, tiramina, espermidina e espermina foram utilizados para avaliação dos seguintes parâmetros de desempenho: seletividade, linearidade, precisão, recuperação, limites de detecção, limites de quantificação e robustez. Os resultados mostraram excelente seletividade e separação de todas as aminas, coeficiente de determinação superior a 0,99, recuperação entre 92,25 e 105,25% na concentração 47,2mg.kg-1, limites de detecção de 0,3mg.kg-1 e limite de quantificação de 0,9mg.kg-1 para todas as aminas, com exceção da histamina, que apresentou o limite de quantificação mais alto, de 1mg.kg-1. Foi concluído que os parâmetros de desempenho demonstraram adequação do método para detecção e quantificação de aminas bioativas em carne de frango.(AU)

Avaliação da qualidade interna de ovos de consumo pela pesquisa do teor de aminas bioativas / Evaluation of the internal quality of commercial eggs by searching of the bioactive levels

Com o objetivo de avaliar a qualidade dos ovos de consumo pela pesquisa dos níveis de aminas bioativas, foram coletados, pelos serviços de inspeção oficiais, 224 amostras de ovos provenientes de cinco regiões distintas do estado de Minas Gerais, durante o período de um ano. As aminas biogênicas (putrescina, cadaverina, feniletilamina, histamina e tiramina) e as poliaminas (espermidina e espermina) foram pesquisadas por cromatografia líquida de alta eficiência e detecção ultravioleta (CLAE/UV) após derivação pré-coluna com cloreto de dansila. Os resultados demonstraram que a putrescina estava presente, em baixas concentrações, em todas as amostras de gema e de albúmen. As demais aminas também foram detectadas, porém em menor frequência, e a espermina somente foi encontrada em uma amostra de albúmen. Foi concluído que os ovos de consumo produzidos no estado de Minas Gerais não são uma fonte considerável de poliaminas, importantes para o crescimento e a proliferação celular, e os baixos teores de aminas biogênicas, formadas pela descarboxilação de aminoácidos por enzimas bacterianas, não representam riscos à saúde do consumidor, o que indica que o ovo apresenta boa qualidade, tomando por base o critério de aminas bioativas.

In order to evaluate the quality of commercial eggs by searching the bioactive amine levels, 224 samples of eggs from the five regions of Minas Gerais State were collected during one year by the official inspection service. The biogenic amines (putrescine, cadaverine, phenylethylamine, histamine and tyramine) and the polyamines (spermidine and spermine) were determined by high performance liquid chromatography with ultraviolet detection (HPLC/UV) and pre-column derivatization with dansyl chloride. The results demonstrated the presence of putrescine in all samples of yolk and albumen, but in low concentrations. The other amines were also detected, however, with a lower frequency, and spermine was found only in one sample of albumen. It was concluded that the commercial eggs produced in Minas Gerais State are not a considerable source of polyamines, important for growth and cell proliferation; and low levels of biogenic amine, formed by decarboxylation of amino acids by bacterial enzymes, do not represent risks to consumer health, indicating that it has good quality, based on the bioactive amine criterion.

Imunidade celular em caninos neonatos - do nascimento ao 45° dia de idade / Cellular immunity in canine newborns - from birth to the 45th day of life

O objetivo do presente trabalho foi acompanhar o desenvolvimento imunológico dos neonatos caninos, a fim de avaliar a imunidade celular pela análise dos leucócitos e linfócitos totais e das subpopulações de linfócitos T (CD4+ e CD8+) pela técnica de citometria de fluxo. Foram utilizados 30 cães neonatos de ambos os sexos, sem raça definida, aos três, 10, 17, 24, 31, 38 e 45 dias de idade. A contagem de leucócitos totais aos 45 dias (11.639±3.574) foi significativamente maior que no terceiro dia de idade (8.740±1.812) (P<0,05); não houve diferença entre a contagem total de linfócitos aos 45 dias em relação ao terceiro dia de idade. Quanto às subpopulações de LT CD4+ e LT CD8+, os percentuais de LT CD4+, aos três dias de idade (24,9±16,8 por cento), foram inferiores quando comparados à média entre o 10°, o 24° e o 31°dia (35,5 por cento), e os de CD8+, ao terceiro dia, menores em relação às médias do 10° e do 31° dia de idade. Pode-se concluir que as subpopulações de LT CD4+ e CD8+ sofrem oscilações durante o desenvolvimento pós-natal, sendo estas crescentes em relação aos níveis obtidos aos três dias de idade. A relação CD4+:CD8+ mostrou superioridade para o primeiro tipo celular, sendo que a maior relação entre CD4+ e CD8+ ocorreu no terceiro dia de idade. Com base nos resultados obtidos neste estudo, notaram-se as diferenças semanais nas populações linfocitárias, o que demonstra a dinâmica dessas células durante o período neonatal...

The aim of this study was to evaluate the immune development of newborn canines, evaluating the cellular immunity by analysis of leukocyte and lymphocyte totals and sub-population of T lymphocytes (CD4+ and CD8+) by the flow cytometry technique. Thirty neonatal mongrel dogs of both sexes were used, at 3, 10, 17, 24, 31, 38 and 45 days of age. The total leukocyte count to 45 days (11639±3574/µL) was significantly greater than on the third day of age (8740±1812) (p<0.05); There were no differences between the total count of lymphocytes at 45 days in relation to the third day of age. As for the subpopulations of CD4+ and CD8+, CD4+ cell percentages, at three days of age (24.9±16.8) they were inferior when compared to the average between the 10th, 24th and 31st day (35.5), and CD8+ cells, on the third day, were lower compared with averages from the 10th and 31st day of age. It can be concluded that the subpopulations of CD4+ and CD8+ cells undergo oscillations during development, with growing postnatal levels obtained at three days old. The CD4:CD8 ratio showed superiority to the first cell type, and the largest relationship between CD4+ and CD8+ occurred on the third day of age. Based on the results obtained in this study, the differences noted in lymphocyte populations weekly showed the dynamics of these cells during the neonatal period...

Morphometric and quantitative characterization of atrial ganglion neurons from the intercaval region in dogs with dilated cardiomyopathy / Caracterização morfométrica e quantitativa dos neurônios ganglionares atriais da faixa intercaval de cães com cardiomiopatia dilatada

The quantity, morphometry, and quality of atrial neurons from the intercaval region in dogs with dilated cardiomyopathy (DCM) were evaluated. Dogs with DCM had greater ganglion neurons than control dogs. The histologic evaluation of the ventricular myocardium and ganglion neurons confirmed DCM and showed the degeneration of ganglion neurons. Dogs with chronic DCM had a secondary cardioneuropathy owing to impaired parasympathetic neural control

Avaliaram-se quantitativa, morfométrica e qualitativamente os neurônios atriais da faixa intercaval de cães com cardiomiopatia dilatada (CMD). Os neurônios dos gânglios nervosos de cães com CMD eram maiores que os dos cães controle. A histopatologia do miocárdio ventricular e dos neurônios ganglionares confirmou a CMD e demonstrou evidente processo degenerativo neuronal ganglionar. Cães com CMD em fase crônica apresentavam cardioneuropatia secundária, provavelmente pela privação da inervação parassimpática cardíaca

The use of hearing protection devices by older adults during recreational noise exposure.

A population-based study to assess the use of hearing protection devices by older adults during noisy recreational activities was performed. The population-based Epidemiology of Hearing Loss Study was designed to measure the prevalence of hearing loss in adults residing in Beaver Dam, Wisconsin. The use of hearing protection devices during noisy recreational activities was assessed by performing three examinations over a period of 10 years (1993-1995, no. of participants (n)=3753, aged 48-92 years; 1998-2000, n=2800, aged 53-97 years; 2003-2005, n=2395, aged 58-100 years). The recreational activities included hunting, target shooting, woodworking/carpentry, metalworking, driving loud recreational vehicles, and performing yard work using either power tools or a chain saw. The prevalence of using hearing protection devices during any of these activities increased with time (9.5%, 15.0%, and 19.9% at baseline, 5 years, and 10 years, respectively). However, the use of hearing protection devices remained low for most activities. Those under the age of 65 were twice as likely to use hearing protection devices during noisy activities than were older adults. Men, those with a hearing handicap, and those with significant tinnitus were more likely to use hearing protection devices. Smokers and the less educated were less likely to use hearing protection devices. The results demonstrated that many adults expose themselves to potentially damaging recreational noise, leaving them at risk for hearing loss.

Transmissão vertical natural por Hepatozoon canis em neonatos caninos. Relato de caso

O artigo não apresenta resumo.

CD4+ T cells participate in the nephropathy of canine visceral leishmaniasis

Renal involvement in visceral leishmaniasis (VL) is very frequent. The renal lesions of humans and dogs are similar but their pathogenesis has not been clearly elucidated. There is growing evidence that the cellular immune response is involved in the pathogenesis of immunologically mediated glomerulonephritis. Since T cells could participate in the pathogenesis of nephropathy, in the present study we investigated the possible involvement of CD4+ and CD8+ T cells in the nephropathy of canine VL. Six dogs naturally infected with Leishmania (Leishmania) chagasi from the endemic area in the Northeast of Brazil, the town of Teresina in the State of Piauí, were studied. An expressive inflammatory infiltrate of CD4+ T cells both in glomeruli and in interstitium was present in 4 animals and absent in 2. CD8+ T cells were detected only in one animal. CD4+ T cells alone were observed in 3 animals; when CD8+ T cells were present CD4+ T cells were also present. CD4+ T cells were observed in cases of focal segmental glomerulosclerosis, diffuse membranoproliferative glomerulonephritis, diffuse mesangial proliferative glomerulonephritis and crescentic glomerulonephritis. CD8+ T cells were present only in a case of crescentic glomerulonephritis. Leishmania antigen was detected in glomeruli and in interstitial inflammatory infiltrate in 4 animals and immunoglobulins were observed in 4 dogs. In this study we observed that T cells, in addition to immunoglobulins, are present in the renal lesion of canine VL. Further studies are in progress addressing the immunopathogenic mechanisms involving the participation of immunoglobulins and T cells in canine VL nephropathy

The onchocerciasis elimination program for the Americas: a history of partnership

The decision in 1987 by the pharmaceutical firm Merck & Co. to provide Mectizan (ivermectin) free of charge to river blindness control programs has challenged the international public health community to find effective ways to distribute the drug to rural populations most affected by onchocerciasis. In the Americas, PAHO responded to that challenge by calling for the elimination of all morbidity from onchocerciasis from the Region by the year 2007 through mass distribution of ivermectin. Since 1991, a multinational, multiagency partnership (consisting of PAHO, the endemic countries, nongovernmental development organizations, the Centers for Disease Control and Prevention in Atlanta, Georgia, as well as academic institutions and funding agencies) has developed the political, financial, and technical support needed to move toward the realization of that goal. This partnership is embodied in the Onchocerciasis Elimination Program for the Americas (OEPA), which is supported by the River Blindness Foundation (RBF) and now by the Carter Center. OEPA was conceived as a means of maintaining a regional initiative to eliminate what is otherwise a low priority disease. Since its inception in 1993, the OEPA has provided more than US$2 million in financial, managerial, and technical assistance to stimulate and/or support programs in Brazil, Colombia, Ecuador, Guatemala, Mexico and Venezuela, so as to take full advantage of the Merck donation. Now halfway into a five-year, US$ 4 million grant provided through the Inter-American Development Bank, the OEPA's capacity to support the regional initiative is assured through 1999

Avaliaçöes eletrocardiográficas nas fases aguda e crônica indeterminada em cäes experimentalmente infectados com Trypanosoma cruzi / Electrocardiographic evaluation of dogs experimentally infected with Trypanosoma cruzi during the acute and indeterminate chronic phases of infection

Grupos de cäes experimentalmente infectados com Trypanosoma cruzi (1,000 tripomastigotas/kg de peso, cepa Colombiana) e infectados e tratados com beta bloqueador (metoprolol) foram avaliados pela eletrocardiografia na fase aguda (semanalmente por 5 semanas) e na fase crônica indeterminada (mensalmente até 6 meses), com o objetivo de estudar a extensäo das lesöes cardíacas. As alteraçöes na fase aguda foram mais frequentes no grupo infectado, destacando-se o aumento da frequência cardíaca, a supressäo da mv e o aumento do intervalo PR, e na fase crônica indeterminada houve persistência do aumento da frequência cardíaca. No grupo infectado e tratado com metoprolol observou-se, durante a fase aguda, a supressäo da mv, e na crônica indeterminada, a manutençäo da frequência cardíaca dentro dos limites normais. As outras alteraçöes registradas, como aumento de onda Q, bloqueios átrio-ventriculares d e1§ e 2§ graus, distúrbios de conduçäo átrio-ventricular, taquicardia ventricular, extrassístole ventricular, assistolia, supressäo ou aumento de onda T, ocorreram principalmente no grupo infectado na fase aguda

Herpes simple / Herpes simplex

Las infecciones producidas por el virus herpes simple siguen siendo un gran problema de salud publica. Todavia no existe una vacuna eficaz y el tratamiento es casi exclusivamente paliativo