scholarly journals Is automated platelet counting still a problem in thrombocytopenic blood?

2003 ◽  
Vol 121 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Raimundo Antônio Gomes Oliveira ◽  
Maria Mariko Takadachi ◽  
Kimiyo Nonoyama ◽  
Orlando César de Oliveira Barretto
Keyword(s):  
Reference Method ◽  
Refraction Index ◽  
International Committee ◽  
Sao Paulo ◽  
São Paulo ◽  
Great Precision ◽  
One Dimensional ◽  
Platelet Counts ◽  
Precision And Accuracy ◽  
Advia 120

CONTEXT: Reliable platelet counting is crucial for indicating prophylactic platelet transfusion in thrombocytopenic patients. OBJECTIVE: To evaluate the precision and accuracy of platelet counting for thrombocytopenic patients, using four different automated counters in comparison with the Brecher & Cronkite reference method recommended by the International Committee for Standardization in Hematology (ICSH). TYPE OF STUDY: Automated platelet counting assessment in thrombocytopenic patients. SETTING: Hematology Laboratory, Hospital do Servidor Público Estadual de São Paulo, and the Hematology Division of Instituto Adolfo Lutz, São Paulo, SP, Brazil. MAIN MEASUREMENTS: Brecher & Cronkite reference method and four different automated platelet counters. PARTICIPANTS: 43 thrombocytopenic patients with platelet counts of less than 30,000/µl RESULTS: The ADVIA-120 (Bayer), Coulter STKS, H1 System (Technicom-Bayer) and Coulter T-890 automatic instruments presented great precision and accuracy in relation to laboratory thrombocytopenic samples obtained by diluting blood from normal donors. However, when thrombocytopenic patients were investigated, all the counters except ADVIA (which is based on volume and refraction index) showed low accuracy when compared to the Brecher & Cronkite reference method (ICSH). The ADVIA counter showed high correlation (r = 0.947). However, all counters showed flags in thrombocytopenic samples. CONCLUSION: The Brecher & Cronkite reference method should always be indicated in thrombocytopenic patients for platelet counts below 30,000 plt /µl obtained in one dimensional counters.

Comparative Evaluation of Hematologic Analyzers Advia® 120, Advia® 2120 and Pentra® 120DX for Platelet Counts below 40 X 109/L.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 1256-1256
Author(s):  
Josep M. Jou ◽  
Fulgencio Navalon ◽  
Ester Jiménez ◽  
Maribel Diaz-Ricart ◽  
Rosa Brugues ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Linear Regression ◽  
Reference Method ◽  
Cell Counting ◽  
Average Difference ◽  
Double Labeling ◽  
Blood Samples ◽  
Platelet Counts ◽  
Flow Cytometric Method ◽  
Advia 120

Abstract More aggressive therapies used for treatment of oncohematological malignancies or control of immune responses are resulting in an increased frequency of platelet counts below the 50 x 109/L limit. The recommended reference method for platelet counts was tedious and showed low reproducibility until now. In the last 2 years, flow cytometry based techniques combined with specific monoclonal antibodies (MoAbs) have been accepted as reference method. We have evaluated the accuracy for low platelet counts of several hematologic analyzers currently used in our laboratories. The new reference method approved by ISLH, ICSH y NCCLS is based on double labeling of platelets using MoAbs directed to CD41 and CD61 followed by flow cytometry analysis. Absolute platelet counts are calculated using a ratio with red blod cell (RBC) counts provided by the hematological analyzers. In our studies, 50 blood samples with platelet counts ranging from 1.5 to 39.4 x109/L were processed in duplicate through 1 Advia 2120 (Bayer Diagnostics), 2 Advia 120 (Bayer Diagnostics) and 2 Pentra 120 DX (Horiba-ABX Diagnostics). Advia analyzers use laser-based technology while Pentra analyzers use impedance one for cell counting. All samples were also processed through the reference flow cytometric method, being platelets identified by their double labeling for CD41 and CD61. The minimal number of platelets acquired in the platelet region was established at 1000. Absolute platelet counts were calculated using RBC counts provided by the respective analyzers. All blood samples were processed within 6 hours from phlebotomy. Statistical methods applied included: coefficient of variation (%CV), coefficient of correlation (r ), linear regression, Passing-Bablock (P-B) regression and Bland-Altman test. Precision of each analyzer was obtained by processing in 10 times different blood samples with counts from 4 to 39 x 109/L. Global results were evaluated, though special attention was paid to subgroups of results below or above 20 x 109/L. Correlation between reference values and counts provided by the Advia 2120 was 0.945 with a linear regression of 0.987x+2.9. P-B correlation was good and the average difference was 2.7 x 109/L. In the subgroup of samples with counts below 20 x 109/L correlation was 0.874 with 1.00x+2.7. P-B was correct and the average difference was 2.8 x 109/L. Results with Advia 120 were always similar to those calculated with the Advia 2120, though the average difference was slightly lower with a value of 1.7 x 109/L. Precision (CV) was 16% for platelet count levels at 4 x 109/L, 12% for those at 13 x 109/L and 4% for those at 39 x 109/L. Correlation with Pentra 120 Dx was 0.937 with a linear regression of 0.894x+2.7, the P-B was acceptable with an average difference of 1.2 x 109/L. Correlation index was 0.824 with a linear regression of 0.88x+2.8 for platelet counts below 20 x 109/L, average difference was of 1.4 x 109/L and a correct P-B. Precision (CV) ranged from 26% at 4 x 109/L and 8% at 20 x 109/L platelet counts. Our data demonstrate that hematological analyzers evaluated provided very reliable results at low platelet counts. Advia and Pentra analyzers investigated tend to over calculate the number of platelets (2.5 and 1.4 x109/L respectively). Correlation scattering was slightly superior with the Pentra analyzer. Overall reproducibility for low platelet counts was excellent for both laser and impedance technologies tested.

scholarly journals First Report of Shallot latent virus in Garlic in Brazil

Plant Disease ◽  
2011 ◽  
Vol 95 (2) ◽  
pp. 227-227 ◽  
Author(s):  
T. Mituti ◽  
J. M. Marubayashi ◽  
M. F. Moura ◽  
R. Krause-Sakate ◽  
M. A. Pavan
Keyword(s):  
False Negative ◽  
Erwinia Carotovora ◽  
International Committee ◽  
Sao Paulo ◽  
Latent Virus ◽  
São Paulo ◽  
First Report ◽  
Putative Coat Protein ◽  
Shallot Latent Virus ◽  
Das Elisa

Garlic (Allium sativum L.) can be infected by several viruses of the genera Allexivirus, Carlavirus, and Potyvirus (3). Garlic common latent virus (GarCLV) and Shallot latent virus (SLV) are the most important Carlavirus species infecting garlic, but only GarCLV has been described on garlic in Brazil. Seven hundred thirty-one samples of garlic showing mosaic symptoms and chlorotic streaking were collected from the states of São Paulo (São Manuel), Minas Gerais (Santa Juliana and São Gotardo), Goiás (Campo Alegre and Ipameri), and Paraná (Guarapuava and Piraquara) from April 2008 to July 2009 and analyzed by double-antibody sandwich (DAS)-ELISA for the presence of GarCLV and SLV using specific antiserum for SLV and GarCLV according to the manufacturer's protocol (Agdia Inc., Elkhart, IN). Cultivars sampled were Caçador, Chonan, Ito, Jonas, Quitéria, and Tropical. Fifty-five samples (7.5% of 731) tested positive for GarCLV, and none of the samples tested positive for SLV. Total RNA was extracted (2) from 15 samples that represented different states of production and used with primers SLV 7044 (5′-CTTTTGGTTCACTTTAGG-3′) and SLV 8004 (5′-GCACGCAATAGTCTACGG-3′), designed in this study, to detect SLV in a one-step reverse transcription (RT)-PCR assay. Only 3 of the 15 samples, two from São Paulo and one from Paraná State, produced a 960-bp fragment covering the putative coat protein gene (ORF 5) (1) of SLV. The amplicons of the three isolates were sequenced. A nucleotide sequence identity of 91 to 92% was detected in comparison with two strains of SLV (GenBank Accession Nos. AB004567 and DQ520093), indicating the presence of two isolates of SLV in São Manuel (São Paulo State) and one in Piraquara, Paraná State (submitted to GenBank as Accession Nos. GU120176, HQ128602, and GU120175, respectively). To confirm identity of the virus, another pair of primers was constructed and tested (SLV 6737: 5′-YCCSGCCARGAAYTTCCC-3′, and SLV 7060: 5′-TTAGAGCGCTGTWAACC-3′), from which a 340-bp fragment covering a portion of TGB2 (ORF 3) and TGB3 (ORF 4) (1) was amplified using the two isolates from São Paulo (GenBank Accession Nos. HQ123181 and HQ123182, respectively). The amplicon sequences shared 87% identity with that of an SLV isolate (Accession No. AJ292226), which confirmed the presence of SLV. The low titer of SLV in garlic might account for the false negative results by DAS-ELISA. The source of cultivated garlic bulbs in these regions of Brazil is unknown. Garlic cloves have been cultivated in São Manuel for approximately 15 years, indicating that SLV may have been present in Brazil for many years. To our knowledge, this is the first report of SLV in Brazil. References: (1) M. J. Adams et al. Virus Taxonomy: 8th Report of the International Committee on Taxonomy of Viruses. Elsevier Academic Press, 2005. (2) Y. D. Bertheau et al. Methods for the Detection and Quantification of Erwinia carotovora subsp. atroseptica on Potatoes. M. C. N. Perombelon and J. M. van der Wolff, eds. Scottish Crop Research Institute, Dundee, U.K., 1998. (3) T. V. M. Fajardo et al. Fitopatol. Bras. 26:619, 2001.

scholarly journals Identificação e caracterização de dois isolados de cole latent virus que infectam brássicas

2019 ◽  
Author(s):  
◽  
Agatha Mota de Oliveira
Keyword(s):  
International Committee ◽  
Sao Paulo ◽  
Latent Virus ◽  
São Paulo ◽  
Rt Pcr ◽  
Distrito Federal

O cole latent virus (CoLV) infecta brássicas e tem sido identificado apenas no Brasil. O vírus possui partículas flexuosas alongadas com cerca de 650 nm de comprimento e genoma constituído por RNA de fita simples poliadenilado com cerca de 8 kb. Apesar do CoLV não ter seu genoma completamente sequenciado, Cole latent virus é aceita pelo International Committee on Taxonomy of Viruses (ICTV) como espécie definitiva do gênero Carlavirus. Diante da escassez de informações da interação vírus-hospedeiros e da inexistência de sequências completas do genoma do CoLV, foram conduzidos testes biológicos e moleculares a partir de espécies e variedades comerciais de brássicas assintomáticas e sintomáticas coletadas nos Estados de Alagoas, Goiás, Paraná, São Paulo e Distrito Federal. Para a confirmação da presença do CoLV, as amostras foram inoculadas mecanicamente em diferentes espécies de plantas indicadoras e de brássicas comerciais e submetidas a RT-PCR utilizando primers específicos para a região 3’ do genoma do CoLV.

scholarly journals Validity and reproducibility of a food frequency questionnaire for adults of São Paulo, Brazil

2014 ◽  
Vol 17 (4) ◽  
pp. 852-859 ◽  
Author(s):  
Soraya Sant'Ana de Castro Selem ◽  
Aline Martins de Carvalho ◽  
Eliseu Verly-Junior ◽  
Jackeline Venâncio Carlos ◽  
Juliana Araujo Teixeira ◽  
...  
Keyword(s):  
Food Consumption ◽  
Food Frequency Questionnaire ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Reference Method ◽  
Weighted Kappa ◽  
Sao Paulo ◽  
São Paulo ◽  
Polyunsaturated Fat ◽  
Food Frequency

OBJECTIVES: To assess the validity and reproducibility of a food frequency questionnaire developed for estimating the food consumption of adults in São Paulo, Brazil, based population study. METHODS: A sample of individuals aged above 20 years, of both genders, living in São Paulo, was used for the validation study (n = 77) and reproducibility study (n = 74) of the food frequency questionnaire. To verify the validity and reproducibility of energy and 19 nutrients were applied two food frequency questionnaires (60 items) and three 24-hour dietary recalls (24HR - reference method). The validity was verified by Spearman correlation coefficient (crude and de-attenuated) and weighted Kappa, and reproducibility by intraclass correlation coefficients and weighted kappa. RESULTS: In analyzes of validity de-attenuated correlation coefficients ranged from 0.21 (carbohydrate) to 0.74 (energy), and weighted kappa exceeded 0.40 for 30% of the nutrients. Polyunsaturated fat and folate did not show significant correlation and weighted kappa. In reproducibility correlation coefficients ranged from 0.36 (polyunsaturated fat) to 0.69 (calcium), and weighted kappa exceeded 0.40 for 80% of the nutrients. CONCLUSION: The food frequency questionnaire analyzed has good validity and reproducibility for estimating the food consumption of adults in São Paulo compared to the reference method, so it is an appropriate instrument to be used in epidemiological studies on similar populations. Estimates of polyunsaturated fat and folate should be interpreted with caution.

Seasonal Variation of Suicide in the City of São Paulo, Brazil, 1996–2010

Crisis ◽  
2014 ◽  
Vol 35 (1) ◽  
pp. 5-9 ◽  
Author(s):  
Daniel Hideki Bando ◽  
Fernando Madalena Volpe
Keyword(s):  
Seasonal Pattern ◽  
Total Sample ◽  
Sao Paulo ◽  
Seasonal Patterns ◽  
São Paulo ◽  
Health Statistics ◽  
Males And Females ◽  
June July ◽  
The City ◽  
Over Time

Background: In light of the few reports from intertropical latitudes and their conflicting results, we aimed to replicate and update the investigation of seasonal patterns of suicide occurrences in the city of São Paulo, Brazil. Methods: Data relating to male and female suicides were extracted from the Mortality Information Enhancement Program (PRO-AIM), the official health statistics of the municipality of São Paulo. Seasonality was assessed by studying distribution of suicides over time using cosinor analyses. Results: There were 6,916 registered suicides (76.7% men), with an average of 39.0 ± 7.0 observed suicides per month. For the total sample and for both sexes, cosinor analysis estimated a significant seasonal pattern. For the total sample and for males suicide peaked in November (late spring) with a trough in May–June (late autumn). For females, the estimated peak occurred in January, and the trough in June–July. Conclusions: A seasonal pattern of suicides was found for both males and females, peaking in spring/summer and dipping in fall/winter. The scarcity of reports from intertropical latitudes warrants promoting more studies in this area.

Programm zur Vorbeugung von Berufsbedingter Dysphonie bei Universitaetsprofessoren in São Paulo/Brasilien

2004 ◽  
Vol 83 (02) ◽  
Author(s):  
SI Cubas de Almeida ◽  
CAA Angelini ◽  
PA Lima Pontes
Keyword(s):  
Sao Paulo ◽  
São Paulo

Sociedade Latino Americana de Biomateriais e Órgãos Artificiais (SLABO)

2019 ◽  
pp. 110-112
Author(s):  
Aron José Pazin de Andrade
Keyword(s):  
Society Journal ◽  
Sao Paulo ◽  
Artificial Organs ◽  
São Paulo ◽  
Academic Society ◽  
De Se ◽  
Belo Horizonte

Foi com grande satisfação que aceitei escrever este editorial para a revista científica “The Academic Society Journal”, um novo e importante meio de divulgação dos trabalhos científicos sul-americanos e até mesmo de outros países, uma vez que é possível a publicações em português, espanhol e inglês. Esta revista é também um meio importante para a divulgação dos trabalhos apresentados nos Congressos de Engenharia e Ciências Aplicadas nas Três Fronteiras (MEC3F), evento anual que acontece na cidade de Foz de Iguaçu, Paraná, Brasil, com apoio do Parque Tecnológico Itaipu, do Instituto Federal de Educação, Ciência e Tecnologia de São Paulo, da Universidade Federal da Integração Latino-Americana e da Universidade Estadual do Oeste do Paraná. Este editorial tem a função de informar os leitores desta revista que o MEC3F conta desde já com o apoio da Sociedade Latino Americana de Biomateriais, Órgãos Artificiais e Engenharia de Tecidos a SLABO, tornando-se um evento satélite da SLABO. Este apoio se dará através da divulgação dos eventos entre os sócios da SLABO, participação dos pesquisadores em palestras ou aulas nas áreas científicas específicas da SLABO, envio de trabalhos científicos de seus membros ao MEC3F além de receber trabalhos científicos dos leitores desta revista para serem apresentados nos congressos organizados pela SLABO. Informações sobre atuação da SLABO podem ser encontradas no site: www.slabo.org.br. O que é a SLABO: Ela é uma sociedade civil sem fins lucrativos que reúne profissionais ligados à pesquisa, ao desenvolvimento, teste e utilização de biomateriais e órgãos artificiais em diferentes aplicações clínicas, incluindo aqueles que utilizam engenharia de tecidos para sua construção. Na sua relação de membros constam os nomes dos principais pesquisadores e profissionais das áreas biológicas e tecnológicas, atuantes no campo da Engenharia, Medicina, Odontologia, Farmácia, Biologia, Veterinária e de Química ligados à área de biomateriais e órgãos artificiais, dos países latino americanos, dos Estados Unidos, Canadá e até países europeus. Contando um pouco da história da SLABO: A necessidade de profissionais que atuavam em Biomateriais e Órgãos Artificiais em se organizarem de modo a propiciar melhores oportunidades de contato, de discussões técnicas, de troca de idéias e de opiniões culminou na organização de alguns eventos científicos no Brasil. Esses encontros revelaram a necessidade de se congregar toda essa massa crítica em uma Sociedade, que intermediasse de forma sistemática e em ambiente favorável essas interações. Nesse contexto, como oportunidade para a concretização desse objetivo, foi sugerida a realização em Belo Horizonte, do I Congresso Latino Americano de Órgãos Artificiais e Biomateriais (1º COLAOB), entre os dias 10 e 13 de dezembro de 1998, ocasião em que foi realizada uma assembleia geral de fundação da SLABO e o presidente do 1º Colaob se tornou o presidente da SLABO. Os congressos foram acontecendo e, em suas assembleias gerais, novas diretorias da SLABO foram empossadas. Veja uma relação desses eventos e os novos presidentes da SLABO: 1º COLAOB, 1998, Belo Horizonte, MG – Presidente: Leonardo Lanna Wykrota; 2º COLAOB, 2001, Belo Horizonte, MG – Presidente: Aron José Pazin de Andrade; 3º COLAOB, 2004, Campinas, SP – Presidente: Cecília Amélia de Carvalho Zavaglia; 4º COLAOB, 2006, Caxambú, MG – Presidente: Glória Dulce de Almeida Soares; 5º COLAOB, 2008, Ouro Preto, MG – Presidente: Marivalda de Magalhães Pereira; 6º COLAOB, 20010, Gramado, RS – Presidente: Luís Alberto Loureiro dos Santos; 7º COLAOB, 2012, Natal, RN– Presidente: Clodomiro Alves Júnior; 8º COLAOB, 2014, Rosário, Argentina – Presidente: Marcos Pinotti Barbosa; Em 2015, devido ao falecimento do Prof. Marcus Pinotti, seu Vice-presidente se tornou Presidente: Marcus Vinicius Lia Fook 9º COLAOB, 2016, Foz do Iguaçu, PR – Presidente: Carlos Roberto Grandini; 10º COLAOB, 2018, João Pessoa, PB – Presidente: Marcus Vinicius Lia Fook; Alguns dos trabalhos apresentados nestes congressos foram selecionados e seus autores foram convidados a enviarem uma versão completa de seus trabalhos para serem revisados e publicados em números especiais da revista Artificial Organs, vejam os editoriais escritos nestas revistas em referências 1, 2, 3 e 4. Como a SLABO está comemorando este ano seus vinte anos de sua fundação, ela ganha um presente, está podendo participar dessa importante iniciativa de grupos de grande relevância para a pesquisa e ensino da América dos Sul, o evento Mec3F e a revista “The Academic Society Journal”. O que nos faz ficar muito agradecidos. Obrigado em nome da SLABO.

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