Best-fit probability distribution models for monthly rainfall of Northeastern Brazil.

The analysis of precipitation data is extremely important for strategic planning and decision-making in various natural systems, as well as in planning and preparing for a drought period. The drought is responsible for several impacts on the economy of Northeast Brazil (NEB), mainly in the agricultural and livestock sectors. This study analyzed the fit of 2-parameter distributions gamma (GAM), log-normal (LNORM), Weibull (WEI), generalized Pareto (GP), Gumbel (GUM) and normal (NORM) to monthly precipitation data from 293 rainfall stations across NEB, in the period 1988-2017. The maximum likelihood (ML) method was used to estimate the parameters to fit the models and the selection of the model was based on a modification of the Shapiro-Wilk statistic. The results showed the chosen 2-parameter distributions to be flexible enough to describe the studied monthly precipitation data. The GAM and WEI models showed the overall best fits, but the LNORM and GP models gave the best fits in certain months of the year and regions that differed from the others in terms of their average precipitation.

Serological survey of porcine circovirus 2 antibodies in Northeastern Brazil by immunoperoxidase monolayer assay / Investigação sorológica de circovirus suíno 2 em granjas comerciais de suínos da região Nordeste do Brasil pela técnica de imunoperoxidase em monocamada de células

Porcine circovirus 2 (PCV2) specific antibodies were evaluated in pigs at 15 to 25 weeks of age by immunoperoxidase monolayer assay. Serum samples (n = 575) were obtained from 16 commercial farms located in six states of northeastern Brazil, including two in Ceará (n = 85), three in Rio Grande do Norte (n = 92), two in Paraíba (n = 49), three in Pernambuco (n = 107), two in Alagoas (n = 39), and four in Bahia (n = 203). Out of the 575 evaluated sera, 470 (81.74%) were reagents with antibody titers ranging from 20 to 5,120. All farms presented reactive animals. There was a statistically significant difference in reactivity proportions between the states of Bahia and Ceará (p < 0.05) and between Bahia and Rio Grande do Norte (p < 0.05). This study provides the first serological investigation for PCV2 in pigs from commercial farms in Northeastern Brazil.(AU)

A presença de anticorpos específicos contra o circovirus suíno 2 (PCV2) foi avaliada em suínos com 15 a 25 semanas de idade pela técnica de imunoperoxidase em monocamada de células. As amostras de soros (n = 575) foram procedentes de 16 granjas comerciais localizadas em seis Estados da região Nordeste do Brasil, incluindo duas no Ceará (n = 85), três no Rio Grande do Norte (n = 92), duas na Paraíba (n=49), três em Pernambuco (n = 107), duas em Alagoas (n = 39) e quatro na Bahia (n = 203). Dos 575 soros avaliados, 470 (81,74%) foram reagentes com títulos de anticorpos que variaram de 20 até 5.120. Todas as granjas avaliadas apresentaram animais reagentes. Houve diferença estatística significante nas proporções de sororeatividade entre os Estados da Bahia e Ceará (p < 0,05) e entre os Estados Bahia e Rio Grande do Norte (p < 0,05). Este estudo mostra a primeira investigação sorológica para PCV2 em suínos de granjas comerciais da região Nordeste do Brasil.(AU)

Serological survey of porcine circovirus 2 antibodies in Northeastern Brazil by immunoperoxidase monolayer assay / Investigação sorológica de circovirus suíno 2 em granjas comerciais de suínos da região Nordeste do Brasil pela técnica de imunoperoxidase em monocamada de células

Porcine circovirus 2 (PCV2) specific antibodies were evaluated in pigs at 15 to 25 weeks of age by immunoperoxidase monolayer assay. Serum samples (n = 575) were obtained from 16 commercial farms located in six states of northeastern Brazil, including two in Ceará (n = 85), three in Rio Grande do Norte (n = 92), two in Paraíba (n = 49), three in Pernambuco (n = 107), two in Alagoas (n = 39), and four in Bahia (n = 203). Out of the 575 evaluated sera, 470 (81.74%) were reagents with antibody titers ranging from 20 to 5,120. All farms presented reactive animals. There was a statistically significant difference in reactivity proportions between the states of Bahia and Ceará (p < 0.05) and between Bahia and Rio Grande do Norte (p < 0.05). This study provides the first serological investigation for PCV2 in pigs from commercial farms in Northeastern Brazil.

A presença de anticorpos específicos contra o circovirus suíno 2 (PCV2) foi avaliada em suínos com 15 a 25 semanas de idade pela técnica de imunoperoxidase em monocamada de células. As amostras de soros (n = 575) foram procedentes de 16 granjas comerciais localizadas em seis Estados da região Nordeste do Brasil, incluindo duas no Ceará (n = 85), três no Rio Grande do Norte (n = 92), duas na Paraíba (n=49), três em Pernambuco (n = 107), duas em Alagoas (n = 39) e quatro na Bahia (n = 203). Dos 575 soros avaliados, 470 (81,74%) foram reagentes com títulos de anticorpos que variaram de 20 até 5.120. Todas as granjas avaliadas apresentaram animais reagentes. Houve diferença estatística significante nas proporções de sororeatividade entre os Estados da Bahia e Ceará (p < 0,05) e entre os Estados Bahia e Rio Grande do Norte (p < 0,05). Este estudo mostra a primeira investigação sorológica para PCV2 em suínos de granjas comerciais da região Nordeste do Brasil.