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Search Results: 1 - 10 of 5769 matches for " Carla Linhares "
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Firefighters' noise exposure: a literature review
Taxini, Carla Linhares;Guida, Heraldo Lorena;
International Archives of Otorhinolaryngology , 2013, DOI: 10.7162/S1809-97772013000100014
Abstract: aim: to review the literature about the effects of environmental noise on the hearing ability of firefighters. method: the pubmed and scielo databases were searched and studies from 2002 to 2012 that included the keywords firefighters, noise, and hearing loss were identified. initially, 24 studies were selected, but only 10 met the inclusion criteria of investigating the effects of occupational noise on firefighters. results: only 2 (20%) studies quantified levels of sound pressure and performed audiological tests to identify associations with noise intensity and 3 (30%) questionnaire-based studies reported that these professionals are more susceptible to hearing loss. four (50%) studies found that noise exposure damages the auditory system in this population. discussion: these findings indicate that there is a necessity for preventive measures to be adopted by this population since it is considered to be at risk. conclusion: in recent years, there have been few studies of firefighters' exposure to occupational noise, but our findings show the importance of new studies that include proper means of quantifying their exposure to noise in different work environments, in order to identify possible adverse conditions as well as to aid in the diagnosis of hearing loss.
Firefighters' noise exposure: A literature review
Taxini, Carla Linhares,Guida, Heraldo Lorena
International Archives of Otorhinolaryngology , 2013,
Abstract: Aim: To review the literature about the effects of environmental noise on the hearing ability of firefighters. Method: The PubMed and Scielo databases were searched and studies from 2002 to 2012 that included the keywords firefighters, noise, and hearing loss were identified. Initially, 24 studies were selected, but only 10 met the inclusion criteria of investigating the effects of occupational noise on firefighters. Results: Only 2 (20%) studies quantified levels of sound pressure and performed audiological tests to identify associations with noise intensity and 3 (30%) questionnaire-based studies reported that these professionals are more susceptible to hearing loss. Four (50%) studies found that noise exposure damages the auditory system in this population. Discussion: These findings indicate that there is a necessity for preventive measures to be adopted by this population since it is considered to be at risk. Conclusion: In recent years, there have been few studies of firefighters' exposure to occupational noise, but our findings show the importance of new studies that include proper means of quantifying their exposure to noise in different work environments, in order to identify possible adverse conditions as well as to aid in the diagnosis of hearing loss.
Análise acústica em brinquedos ruidosos Acoustics analysis of the noisy toys
Carla Linhares Taxini,Sérgio Kodi Kinoshita,Heraldo Lorena Guida
Revista CEFAC , 2012, DOI: 10.1590/s1516-18462012005000066
Abstract: OBJETIVO: analisar os níveis de ruídos emitidos por brinquedos nacionalmente comercializados, utilizados por crian as de 1 a 5 anos; comparar os valores entre os brinquedos com e sem selo do Inmetro (Instituto Nacional de Metrologia, Normaliza o e Qualidade Industrial) e analisar o espectro acústico dos brinquedos, com o intuito de identificar a área da cóclea que pode ser mais afetada por esses ruídos. MéTODO: as medi es foram realizadas em 20 brinquedos sonoros (10 com o selo do Inmetro e 10 sem o selo) com o uso do decibelímetro digital em sala acusticamente tratada, e a análise dos sons emitidos pelos brinquedos foi realizada por meio do programa Praat. RESULTADOS: a intensidade do ruído dos brinquedos com o selo do Inmetro posicionados a 2,5 cm do equipamento variou de 61,50 a 91,55 dB(A) e 69,75 a 95,05 dB(C) e a referente à distancia de 25 cm variou entre 58,30 a 79,85 dB(A) e 62,50 a 83,65 dB(C). A intensidade do ruído dos brinquedos sem o selo do Inmetro a 2,5 cm variou entre 67,45 a 94,30 dB(A) e 65,4 a 99,50 dB(C) e na distancia de 25 cm registrou desde 61,30 a 87,45 dB(A) e 63,75 a 97,60 dB(C), portanto os achados demonstraram que existem brinquedos ruidosos que ultrapassam os valores recomendados pela legisla o vigente em ambos os grupos, com e sem selo do Inmetro. CONCLUS O: os brinquedos sem o selo do Inmetro apresentaram valores de intensidade significantemente maior em rela o ao outro grupo, oferecendo maior risco à saúde auditiva das crian as. PURPOSE: to analyze the levels of noise emitted by nationally-sold toys for use by children from 1 to 5 year old; to compare the values among the toys with and without the seal of Inmetro (National Institute of Metrology, Standardization and Industrial Quality) and to analyze the sound spectrum of toys, in order to identify the area of the cochlea that may be more affected by these noises. METHOD: measurements were performed on 20 sound toys (10 with the seal of the Inmetro and 10 without the seal) with the use of digital sound level meter in an acoustically treated room, and the sound analysis was performed using the Praat program. RESULTS: toys placed at 2.5 cm from the equipment with the seal of the Inmetro had an intensity ranging from 61.50 to 91.55 dB (A) and from 69.75 to 95.05 dB (C), positioned at 25 cm ranged from 58.3 to 79.85 dB (A) and from 62.50 to 83.65 dB (C). The results of the toys without warranty stamps placed at 2.5 cm ranged from 67.45 to 94.30 dB (A) and 65.4 to 99.50 dB (C) and the distance of 25 cm recorded from 61. 30 to 87.45 dB (A) and 63.75 to 97.60 dB (C), so tha
Antiviral activity of Agaricus blazei Murrill ss. Heinem extract against human and bovine herpesviruses in cell culture
Bruggemann, Rafaela;Matsuo Orlandi, Janaina;Benati, Fabricio Jose;Faccin, Ligia Carla;Mantovani, Mario Sergio;Nozawa, Carlos;Linhares, Rosa Elisa Carvalho;
Brazilian Journal of Microbiology , 2006, DOI: 10.1590/S1517-83822006000400029
Abstract: the aqueous extract of agaricus blazei murill ss. heinem, a basidiomycete native from brazil, frequently used by popular medicine, mainly in the form of tea, was assessed to its antiviral action against herpes simplex type 1 (hsv-1) and bovine herpes type 1 (bohv-1) in hep-2 cell culture. viral replication inhibition was evaluated by plaque assay and immunofluorescence test. the extract demonstrated virucide action for both viruses, being more effective against hsv-1, inhibiting its infectivity in 78.4 and 73.9% at the concentrations of 50 and 100 μg/ml, respectively moreover, reduction in 47% the number of fluorescent cells was observed for both concentrations. the extract also showed discrete therapeutic activity. these results suggest that a. blazei extract acts mainly in the viral particle, however, the effect during virus replication can not be ruled out.
The infectivity of pig rotavirus in stools
RAMOS, Ana Paula Dores;STEFANELLI, Carla Cristina;LINHARES, Rosa Elisa Carvalho;BRITO, Benito Guimar?es de;NOZAWA, Carlos Mitihiko;
Brazilian Journal of Veterinary Research and Animal Science , 1998, DOI: 10.1590/S1413-95961998000200007
Abstract: rotaviruses are the major pathogen for both human and animal. they affect young animals in intensive rearing and cause great economic losses. this study intended to evaluate the infectivity of porcine rotavirus maintained for 32 months at approximately 10oc. in the original stools specimens. thirty stools specimens of 1-4-week-old piglets originating from breeding farms located in the southwest region of the paraná state were selected for this study. they were randomly chosen from stools samples positive for rotavirus by polyacrylamide gel electrophoresis (page) at the time of collection. the thirty stools samples maintained for 32 months at approximately 10oc were re-tested by page and 11 out of 30 were still positive showing the integrity of the eleven bands of viral rna. to demonstrate the maintenance of viral infectivity, clarified and trypsin-treated stools specimens homogenates were inoculated in ma-104 cell cultures. after an average of 3 blind passages 5 out of 11 samples demonstrated cytophathic effect similar to that of standard simian rotavirus (sa-11). to confirm these findings, a immunofluorescent test was used and demonstrated typical cytoplasmic granular fluorescence. electron microscopy of stools samples showed that most of the virus particles were single- shelled and some were found to be in an advanced state of degradation. therefore the conclusion was that porcine rotavirus infectivity is maintained for a long period of time in stool specimens at low temperature. this certainly is an important aspect for the maintenance of viable virus in natural condition as well as for the transmission of the disease.
Comprimento cervical como preditor do período de latência e de infec??o na rotura prematura pré-termo de membranas
Sousa, Carla Roberta Macedo de;Linhares, José Juvenal;Arcanjo, Francisco Carlos Nogueira;Andrade, Renata Nogueira;Vieira, Márcio Fragoso;
Revista Brasileira de Ginecologia e Obstetrícia , 2012, DOI: 10.1590/S0100-72032012000400004
Abstract: purpose: to verify cervical length using transvaginal ultrasonography in pregnant women between 28 and 34 weeks of gestation, correlating it with the latent period and the risk of maternal and neonatal infections. methods: 39 pregnant women were evaluated and divided into groups based on their cervical length, using 15, 20 and 25 mm as cut-off points. the latency periods evaluated were three and seven days. included were pregnant women with live fetuses and gestational age between 28 and 34 weeks, with a confirmed diagnosis on admission of premature rupture of membranes. patients with chorioamnionitis, multiple gestation, fetal abnormalities, uterine malformations (bicornus septate and didelphic uterus), history of previous surgery on the cervix (conization and cerclage) and cervical dilation greater than 2 cm in nulliparous women and 3 cm in multiparae were excluded from the study. results: a <15 mm cervical length was found to be highly related to a latency period of up to 72 hours (p=0.008). a <20 mm cervical length was also associated with a less than 72 hour latency period (p=0.04). a <25 mm cervical length was not found to be statistically associated with a 72 hour latency period (p=0,12). there was also no significant correlation between cervical length and latency period and maternal and neonatal infection. conclusion: the presence of a short cervix (<15 mm) was found to be related to a latency period of less than 72 hours, but not to maternal or neonatal infections.
Possibilidades de transmiss?o e vias de inocula??o da lepra murina em ratos e outros animais
Linhares, Herminio;
Memórias do Instituto Oswaldo Cruz , 1943, DOI: 10.1590/S0074-02761943000300003
Abstract: 1) the a. reviews the routes of natural transmission of rat leprosy and the experimentally induced disease. 2) the infection in the natural disease must be made by contact with an infected rat or through the gastro-intestinal route by eating infected tissue. 3) they were found acid-fast bacilli in lice (polyplax spinulosa) caught on rats dying of leprosy; but it was impossible to obtain cultures in l?wenstein medium, from these lice. 4) rat leprosy emulsion introduced into the stomach, may infect rats. five rats fed with infected material became infected. 5) after subcutaneous or intraperitoneal inoculation there were obtained infection in almost 100% of cases. 6) it was possible to infect didelphis aurita after inoculation of infected rat material. these animals most likely are more susceptible to rat leprosy than to human leprosy. 7) it was possible to infect chicks by inoculation in chest muscle, by intraperitoneal injection and by gastrointestinal route. 8) it was possible to infect pigeon by inoculation in chest muscle and by intravenous inoculation.
Suscetibilidade de camondongos ao virus amarílico administrado por vias extraneurais
Linhares, Herminio;
Memórias do Instituto Oswaldo Cruz , 1943, DOI: 10.1590/S0074-02761943000200010
Abstract: 1. french neurotropic, asibi and vaccine (17d) virus, infect young mice (21 days) when instilled in the nostrils, killing them with symptoms of encephalitis or developing immunity. 2. french neurotropic virus and asibi (and perhaps vaccine virus), when instilled in the ear of young mice, may infect them producing development of immunity. 3. after instilation in the scarified cornea of young mice, french neurotropic virus, asibi and perhaps vaccine virus, may produce infection. the cornea being, however, whole it has not been able to infect mice. 4. french neurotropic virus, asibi, vaccine, asib egg i and egg iii introduced into the stomach, may infect young mice, causing e fatal encephalitis or rendering them immune. 5. it is possible to infect mice 0-6 days old by simple deposition of virus or rubbing the suspension on the whole and scarified skin.
Verifica??o da lepra murina na cidade do Rio de Janeiro: sua distribui??o geográfica e considera??es endemiológicas
Linhares, Herminio;
Memórias do Instituto Oswaldo Cruz , 1942, DOI: 10.1590/S0074-02761942000300010
Abstract: 1 ? rat leprosy hás been found in the city of rio de janeiro. among 10.000 rats examined there were 37 that presented characteristic lesion of rat leprosy disease, out of which 32 were rattus norvegicus (86,5%), 3 rattus alexandrinus (8,1%) and 2 mus musculus (5,4%). 2 ? the disease was observed mostly in adult rats, i.e 94,6%; the rest being observed in young ones. 3 ? probably the sex has not influence upon the infection, but the a. has found 24 males and 13 females affected, a ratio of 1.8:1. 4 ? the glandular form of the disease was the most prevalent being observed in 25 rats, 9 rats showed the musculo-cutaneous form and 3 the mixed form. this one was noticed only in advanced cases of the infection.
Contribui??o ao estudo da patologia da lepra murina
Linhares, Herminio;
Memórias do Instituto Oswaldo Cruz , 1942, DOI: 10.1590/S0074-02761942000400003
Abstract: the a. reviewed the bibliography of pathology of murine leprosy. out of 41 rats expontaneously infected with murine leprosy 39% had alopecia, especially on the back; 78% had subcutaneous infiltrations; 13 of them presented tumour-like grows, sometimes large as 5 cm. of diameter; eight animals had ulcerations varying from 1 to 15 in number; 11 had skin nodules; two presented splenomegaly and two others small nodules upon the surface of the spleen; five had microabcesses on the liver; two had pneumonia and two others showed microcabcesses on their lungs. the other organs were macroscopically normals. histopathological studies were made with materials of natural and experimental rat leprosy disease. granulomata were seen on sections of their skins, lumph nodes, spleens, bone marrows, livers, lungs and kidneys. the testicles were rarely envolved. the granulomatous tissues are formed by mononuclear cells or by large plae cells resembling epithelioid celss, in which there were numerous bacilli. the infections process become localisated by long time in the lumph nodes. rat leprosy by its nature and probably origin of the affected cells suggest a primordially disease of the reticulo-endothelial system.
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