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Moitinho MDL, Ferreira CS. [Evaluation of a technique of sedimentation in tubes]. Rev Inst Med Trop Sao Paulo 1994; 36:153-6. [PMID: 7997791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The efficiency of sedimentation in test tubes for the detection of eggs of Ancylostomidae, Trichuris trichiura and Ascaris lumbricoides was tested in 80 mm-high columns of fecal suspensions. Dilutions of 2.0%, 1.5% and 1.0% were tested by using samples containing, respectively, 12.5, 25.0, 50.0, 100.0, 150.0 and 200.0 eggs per gram (epg) of each helminth under study. Efficiency was evaluated in terms of frequency of positive results and eggs per slide of the sediment (0.078 ml). Both the frequencies of positive results and egg counts per slide increased with epg values, but were not apparently dependent from suspension dilutions within the range assessed. Sediments of 1.0% fecal suspensions were positive in 80.0% or more of the cases for epg values of 150.0. It is inferred that dilution values are not critical. Thus, it is not necessary to determine fecal weights or volumes instrumentally. Considering overall results, it may be concluded that 1.0% fecal dilutions should be recommended for best results both in terms transparency of the preparations and chances of recovering eggs, particularly when egg counts are low.
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Ferreira MU, Ferreira CS. Malaria sporozoite rates in Anopheles mosquitoes: theoretical comparability of salivary gland dissection with the ELISA detection method. MEDICAL AND VETERINARY ENTOMOLOGY 1993; 7:304-306. [PMID: 8369570 DOI: 10.1111/j.1365-2915.1993.tb00695.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Wünsch Filho V, Settimi MM, Ferreira CS, do Carmo JC, Santos UP, Martarello NA, Costa DF. Sistema de informação para a ação: subsídios para a atuação prática dos programas de saúde dos trabalhadores a nível local. CAD SAUDE PUBLICA 1993; 9:136-48. [PMID: 15448834 DOI: 10.1590/s0102-311x1993000200004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Nas últimas décadas o Brasil transformou-se em uma sociedade industrializada. A partir da perspectiva epidemiológica e considerando as mudanças que estão ocorrendo a população brasileira, particularmente nos aspectos da transição demográfica, discute-se neste trabalho a necessidade de repensar a abrangência e prioridade do sistema de vigilância epidemiológica no país. O estudo avalia o sistema de informação para a ação de acidentes do trabalho a nível local, implantado no Programa de Saúde dos Trabalhadores do SUDS-R-6 (Mandaqui), tendo por base os dados de uma empresa metalúrgica da região que o sistema identificava como apresentando um processo de produção com alto risco de acidentes. A participação dos trabalhadores acidentados na discussão sobre os riscos ambientais e processo de trabalho, permitiu esclarecer a multicausalidade envolvida nos acidentes ocorridos nesta empresa. É destacada a importância da participação dos trabalhadores organizados - através de seus sindicatos, nas ações de controle dos acidentes. Embora, nem sempre essa participação organizada seja possível, o setor saúde deve buscar formas de atuação que resgatem a experiência concreta dos trabalhadores.
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Santos UP, Rumel D, Martarello NA, Ferreira CS, Matos MP. [Sick building syndrome in bank employees]. Rev Saude Publica 1992; 26:400-4. [PMID: 1342531 DOI: 10.1590/s0034-89101992000600005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
This study seeks, for the first time, to identify the sick building syndrome in Brazil. The study population consisted of 312 bank-clerks distributed in two closed buildings situated in S. Paulo city, Brazil. Data were collected by questionnaire, the design was cross-sectional and analysis made by logistic regression. Female, job satisfaction and inappropriate temperature were related to general symptoms. Female and inappropriate temperature were related to mucus membrane symptoms. Job satisfaction was related to absenteeism.
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Moitinho MDL, Ferreira CS. [The evaluation of the specific gravity of Giardia duodenalis and Entamoeba coli cysts]. Rev Inst Med Trop Sao Paulo 1992; 34:395-7. [PMID: 1342101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Cysts of Giardia duodenalis and Entamoeba coli were observed as for floatability in sucrose solutions of different specific gravity, contained in counting-chambers of 0.17 mm height. The cysts that floated and those that sedimented were counted and then calculated the respective percentage. Floatability differences of the cysts of each species were not considerable. Solutions of specific gravity 1,200 kg/m3 made 88.49% of G. duodenalis cysts and 95.71% of E. coli cysts float. The greater values of floatability were associated to specific gravity 1,250 kg/m3 and were 89.15% and 98.59% for cysts of G. duodenalis and E. coli, respectively.
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31
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Ferreira MU, Ferreira CS. Malaria diagnosis by fluorescence microscopy. ACTA ACUST UNITED AC 1992; 8:271; author reply 271. [PMID: 15463635 DOI: 10.1016/0169-4758(92)90139-s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Ferrari JO, Ferreira MU, Camargo LM, Ferreira CS. Intestinal parasites among Karitiana Indians from Rondônia State, Brazil. Rev Inst Med Trop Sao Paulo 1992; 34:223-5. [PMID: 1342074 DOI: 10.1590/s0036-46651992000300007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Gravity sedimentation parasitological examinations were performed in stool samples from 111 Karitiana Indians from Rondônia State, Brazilian Amazon Basin. Intestinal parasites were found in 43 samples (38.7%). Ascaris lumbricoides was the most prevalent helminth species (18.9%). Egg counts in samples positive for Ascaris suggested an overdispersed distribution of worm burdens in the host population. Age-distribution pattern of intestinal parasites among Karitiana Indians was found to be rather unusual: the highest prevalence (60.0%) was detected in the 12- to 16-year-old age group.
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33
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Abstract
A sedimentation technique is described, in which a fecal suspension is placed on top of an aqueous sucrose solution of specific gravity 1.015 g/cm3. Using 100 by 15 mm test tubes, duplicate gravity sedimentation experiments were made using homogenized fecal suspensions (single-columns) and fecal suspensions placed on top of clear columns (double-columns). Egg and cyst counts, and turbidity determinations were made in the sediments obtained after definite time intervals. Most Ascaris lumbricoides, Trichuris trichiura and Ancylostomidae eggs sedimented within 20 minutes in single-and between 30 and 60 minutes in double-columns. Giardia duodenalis cysts required longer periods to sediment in double-than in single-columns; after 180 minutes (the maximum period of observation), double-column sediments produced 60.0% of the counts of single-columns. Double-column sediments were consistently less turbid than single-column ones.
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De Carvalho ME, Ferreira MU, De Souza MR, Ninomia RT, Matos GF, Camargo LM, Ferreira CS. Malaria seroepidemiology: comparison between indirect fluorescent antibody test and enzyme immunoassay using bloodspot eluates. Mem Inst Oswaldo Cruz 1992; 87:205-8. [PMID: 1308565 DOI: 10.1590/s0074-02761992000200006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Blood sampling on filter paper is a current practice in malaria seroepidemiological studies by indirect fluorescent antibody test (IFAT). There is, however, scant comparative information about the use of bloodspot eluates for detection of malarial IgG antibodies simultaneously by IFAT and enzyme immunoassay (ELISA). Here we report data obtained by both serological methods done on 219 bloodspot eluate samples collected in a rural community in Brazilian Amazon Basin (Alto Paraíso, Ariquemes municipality) where malaria is endemic. Plasmodium falciparum and P. vivax thick smear antigens were used in the IFAT; a detergent-soluble P. falciparum antigen was prepared for ELISA. Substantial agreement of results (Kappa coefficient k = 0.686) was observed when P. falciparum antigen was used in both tests, and IFAT titers were found to be strongly correlated to ELISA antibody units (Spearman correlation coefficient rs = 0.818, p < 0.001). Only moderate agreement (k = 0.467) between IFAT with P. vivax antigen and ELISA with P. falciparum antigen was observed. Spearman correlation coefficient value between quantitative results (IFAT titers and ELISA antibody units) in this case was numerically lower (rs = 0.540, p < 0.0001). Our results suggest that, with P. falciparum antigen, both IFAT and ELISA performed on bloodspot eluates are equivalent for seroepidemiological purposes.
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Ferreira MU, Stolf AM, Ferreira CS, Katzin AM, Ramos AM, Kimura E, Di Santi SM, Camargo LM. Using a microplate reader to quantify dot immunobinding assays. Mem Inst Oswaldo Cruz 1991; 86:467-8. [PMID: 1842439 DOI: 10.1590/s0074-02761991000400017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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36
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Ferreira CS, Camargo LM, Moitinho ML, de Azevedo RA. Intestinal parasites in Iaualapiti Indians from Xingu Park, Mato Grosso, Brazil. Mem Inst Oswaldo Cruz 1991; 86:441-2. [PMID: 1842434 DOI: 10.1590/s0074-02761991000400012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Brine flotation and gravity sedimentation coproscopical examinations were performed in stool samples from 69 of the 147 Iaualapiti Indians of the Xingu Park, Mato Grosso State, Brazil. Intestinal parasites were present in 89.9% of the population examined. High rates of prevalence were found for some parasite species: Ancylostomidae, 82.6%; Enterobius vermicularis, 26.1%; Ascaris lumbricoides, 20.3%; and Entamoeba coli, 68.1%. Infection by Trichuris trichiura, Schistosoma mansoni, Taenia spp. and Hymenolepis nana was not detected. Helminth's prevalence in children aged one year or less was comparatively low (33.3%). Quantitative coproscopy was done in positive samples for Ascaris and Ancylostomidae and the results expressed in eggs per gram of feces (EPG). Quantitative results revealed that worm burdens are very low and overdispersed in this Indian tribe, a previously unreported fact.
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37
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Pereira DDS, Ferreira CS. [Method of Faust et al.: yield of collection through metallic loop]. Rev Inst Med Trop Sao Paulo 1991; 33:153-8. [PMID: 1844386 DOI: 10.1590/s0036-46651991000200011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The efficiency of the use of a wire loop for the removal of floating parasitic elements was investigated. The quantity of elements removed by each successive loopful was confronted with a logarithmic model which indicated that each loopful carried about 30% of the remaining floating parasitic elements. It was estimated that the first five loopfuls carried a total of 83% of the floating parasitic elements, being this adequate procedure for the method under investigation.
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Soares CM, Urmenyi TP, Ferreira CS, de Carvalho EF, Carvalho JF, Rodinelli E, de Castro FT. Thermal and developmental regulation of gene expression in Trypanosoma cruzi. Mem Inst Oswaldo Cruz 1988; 83 Suppl 1:337-44. [PMID: 3075682 DOI: 10.1590/s0074-02761988000500019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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39
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Pedroso ER, Lambertucci JR, Greco DB, Rocha ODC, Ferreira CS, Raso P. Pulmonary schistosomiasis mansoni: post-treatment pulmonary clinical-radiological alterations in patients in the chronic phase: a double-blind study. Trans R Soc Trop Med Hyg 1987; 81:778-81. [PMID: 3130687 DOI: 10.1016/0035-9203(87)90030-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A double blind trial was set up to study the pulmonary effects of specific treatment with oxamniquine of 40 patients with chronic schistosomiasis mansoni. Radiological alterations characterized by bronchopneumonitis were seen in 17.5% of the patients after treatment, but in none of the placebo group; non-migratory condensation occurred between 25 and 72 h after treatment, with a mean duration of 7 d. 86% of the patients showed spontaneous healing with no radiological sequelae after 30 d of follow-up. Slight pulmonary clinical manifestations without any functional repercussions were also seen. The alterations were probably related to the host-parasite interaction, and the lesions may have been caused by deposition of immune complexes in the lungs with local activation of complement.
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Pedroso ER, Lambertucci JR, Rocha MO, Greco DB, Ferreira CS, Rocha RS, Katz N. Bowel x-ray alterations in acute human schistosomiasis. Rev Soc Bras Med Trop 1987; 20:159-62. [PMID: 3148976 DOI: 10.1590/s0037-86821987000300006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A radiological study of the small intestine of 17 untreated patients in the acute phase ofschistosomiasis was performed. Twelve patients (70% of total) had alterations: nine had clear-cut thickening of the duodenal and jejunal folds, one flocculation, one fragmentation and one thickening of mucosae, flocculation and fragmentation of the barium column. There was no correlation of the gastrointestinal symptomatology (vomiting, diarrhoea, dysentery, hepatomegaly) neither with the parasitological load nor with the x-ray alterations.
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41
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Greco DB, Pedroso ER, Lambertucci JR, Rocha MO, Coelho PM, Raso P, Ferreira CS. Pulmonary involvement in schistosomiasis mansoni. Mem Inst Oswaldo Cruz 1987; 82 Suppl 4:221-7. [PMID: 2978271 DOI: 10.1590/s0074-02761987000800040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The post-treatment pulmonary alterations were evaluated in patients (Study 1) and in mice (Study 2) infected with Schistosoma mansoni. Study 1: the patients were examined pre and post-treatment (with ora oxamniquine) and the following exams were performed: sputum for eosinophils and chest x-ray. Study 2: four groups of mice (total = 64) were studied; Group I (infected and treated with oxamniquine); II (infected and not treated); III (not infected and treated) and IV (not infected and not treated). All were x-rayed to check for pulmonary abnormalities pre and post-treatment and lung specimens were studied by optical microscopy and immunofluorescence. We have found abnormalities in the parameters checked in both studies and the results suggest an immunological reaction, probably due to deposition of immune complexes in the lungs, with subsequent activation of the complement system. The experimental study showed that the alterations are not dependent of the presence of eggs and/or worms of S. mansoni in the lungs, thus corroborating the hypothesis of deposition of circulating material.
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Boechat MI, Gold RH, Gilsanz V, Ferreira CS. Radiological aspects of South American blastomycosis in children. ANNALES DE RADIOLOGIE 1984; 27:247-52. [PMID: 6721432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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43
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Ferreira CS, Lopes ER, Chapadeiro E, de Oliveira Almeida H, de Souza WF, da Silva Neto IJ. [Post-mortem coronary angiography in chronic Chagas carditis, Anatomo-radiologic correlation]. Arq Bras Cardiol 1980; 34:81-6. [PMID: 6773509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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44
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Maspes V, Ferreira CS, Tamigaki M. [Changes produced by blood transfusions in the egg output of hookworms]. Rev Inst Med Trop Sao Paulo 1978; 20:329-33. [PMID: 571617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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45
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Ferreira CS, de Carvalho ME. [Indirect immunofluorescence reactions: various modifications of their technic]. Rev Saude Publica 1973; 7:303-6. [PMID: 4596931 DOI: 10.1590/s0034-89101973000300013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Propõem-se modificações de procedimentos rotineiros de reações de imunofluorescência indireta. A eluição das amostras de sangue dessecado contidas em papel-filtro é feita em placas ("godets") com tampas. Alças de níquel-cromo substituem pipetas capilares para a transferência de amostras de eluatos para as lâminas de microscopia. Propõe-se uma técnica rápida e eficiente de lavagem das preparações.
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46
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Ferreira CS, Carvalho ME. [Clearing of fecal smears]. Rev Saude Publica 1972; 6:19-23. [PMID: 4680257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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47
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Dannemann A, Ferreira CS, Falci F. [Non-parasitic hepatic cysts]. HOSPITAL (RIO DE JANEIRO, BRAZIL) 1970; 78:55-68. [PMID: 5312453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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48
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Rodrigues DC, Ferreira CS. [1st finding of a rodent (Nectomys squamipes) naturally infested by Schistosoma mansoni, in the State of São Paulo (Brazil)]. Rev Inst Med Trop Sao Paulo 1969; 11:306-8. [PMID: 5361753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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49
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Rodrigues DC, Ferreira CS. [Epidemiology of schistomiasis in the municipality of São Paulo]. HOSPITAL (RIO DE JANEIRO, BRAZIL) 1969; 75:1903-12. [PMID: 5311450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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50
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Rodrigues DDC, Ferreira CS. [Active focal infection of schistosomiasis mansoni in the municipality of São Paulo]. HOSPITAL (RIO DE JANEIRO, BRAZIL) 1966; 70:1705-14. [PMID: 5301977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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