Habitat and landscape factors associated with the nestedness of waterbird assemblages and wetland habitats in South Brazil

2018 ◽  
Vol 43 (8) ◽  
pp. 989-999 ◽  
Author(s):  
Marina H. Schuh ◽  
Demetrio L. Guadagnin

Author(s):  
Paulo Roberto Romanelli ◽  
Andressa Maria Rorato Nascimento de Matos ◽  
Fernanda Pinto-Ferreira ◽  
Eloiza Teles Caldart ◽  
Juliana Silva de Oliveira ◽  
...  

Abstract The aim of this study was to determine the occurrence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies and their associated factors among goats in farms from the Paraná state, South Brazil. The serological analysis was performed by indirect ELISA on 629 goat serum samples collected from 32 farms distributed in five mesorregions from the state. Seropositivity was observed in 30.7% of the animals for T. gondii, 6.3% for N. caninum, and 3.0% for both agents. Final multiple regression models showed that the use of assisted reproduction decreased the chance of seropositivity for T. gondii (PR=0.70) and the slaughtering site on the farm (PR=2.03) increased it. To N. caninum, the supplying concentrated feed to animals (OR=4.80) and animal pre-weaning death (OR=9.96) increased the chance of seropositivity. The variables associated with these seropositivities suggest deficiencies in sanitation and reproductive management. In addition, it recognizes critical points of infection for animal production management.



2016 ◽  
Vol 4 (5) ◽  
Author(s):  
Thiago G. S. Paim ◽  
Luiza Pieta ◽  
Janira Prichula ◽  
Gustavo E. Sambrano ◽  
Renata Soares ◽  
...  

Escherichia coli is a common pathogen recovered from cystitis infections. In this report, we announce the draft genome sequence of strain E2 isolated from the urine specimen from a female patient in South Brazil. The genome assembly has 5,081,209 bp, a G+C content of 50.57%, and virulence factors associated with both enteroaggregative and uropathogenic E. coli strains.



2011 ◽  
Vol 36 (2) ◽  
pp. 269-278 ◽  
Author(s):  
Eva A. Buckner ◽  
Mark S. Blackmore ◽  
Stephen W. Golladay ◽  
Alan P. Covich




Gerodontology ◽  
2019 ◽  
Vol 36 (4) ◽  
pp. 338-344 ◽  
Author(s):  
Rafaela Soares Rech ◽  
Fernando Neves Hugo ◽  
Luísa Helena do Nascimento Tôrres ◽  
Juliana Balbinot Hilgert


2006 ◽  
Vol 16 (4) ◽  
pp. 1231-1244 ◽  
Author(s):  
Demetrio Luis Guadagnin ◽  
Leonardo Maltchik


2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Tharaka Wijerathna ◽  
Nayana Gunathilaka ◽  
Kithsiri Gunawardena ◽  
Wasana Rodrigo


2020 ◽  
Author(s):  
Sarina Macfadyen ◽  
Wee Tek Tay ◽  
Andrew D. Hulthen ◽  
Cate Paull ◽  
Andrew Kalyebi ◽  
...  

Abstract Context African production landscapes are diverse, with multiple cassava cultivars grown in small patches amongst a diversity of other crops. Studies on how diverse smallholder landscapes impact herbivore pest outbreak risk have not been carried out in sub-Saharan Africa. Objectives Bemisia tabaci is a cryptic pest species complex that cause damage to cassava through feeding and vectoring plant-virus diseases and are known to reach very high densities in certain contexts. However, the factors driving this phenomenon are unclear. Methods Bemisia density data in cassava across a large number of sites representing a geographic gradient across Uganda, Tanzania and Malawi were collected. We tested whether in-field or landscape factors associated with land-use patterns underpinned Bemisia density variability and parasitism. Results We found the B. tabaci SSA1 species dominated our study sites, although other species were also common in some cassava fields. Factors associated with the surrounding landscape were unimportant for explaining variability in adult density, but the in-field variables of cassava age and cultivar were very important. The density of nymphs and the parasitism of nymphs was heavily influenced by a diversity of landscape factors surrounding the field, including the size of focal cassava field, and area of cassava in the landscape. However, unlike the trend from many other studies on drivers of natural enemy populations, this pattern was not solely related to the amount of non-crop vegetation, or the diversity of crops grown in the landscape. Conclusions Our findings provide management options to reduce whitefly abundance, including describing the characteristics of landscapes with high parasitism. The choice of cassava cultivar by the farmer is critical to reduce whitefly outbreak risk at the landscape-scale.



Author(s):  
Paulo Roberto Romanelli ◽  
Andressa Maria Rorato Nascimento de Matos ◽  
Fernanda Pinto-Ferreira ◽  
Eloiza Teles Caldart ◽  
João Lucas Moura do Carmo ◽  
...  

Abstract The aim of this study was to evaluate the seroprevalence and factors associated with the presence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies in sheep from Paraná state. The detection of antibodies for T. gondii and N. caninum was performed by homemade and commercial indirect ELISA, respectively. Multiple logistic regression analysis was used to verify the factors associated with the seroprevalence. Antibodies anti-T. gondii and anti-N. caninum were observed in 42.7% and in 17.6% of the animals, respectively. The protective factors associated to seropositive were “some level of confinement” (full or semi-extensive confinement) (OR=0.53) for T. gondii and “use of skilled labor” (OR=0.64) for N. caninum. The risk factors were “presence of cats” (OR=1.75) for T. gondii and “feeding of dogs with sheep placental remains” (OR=1.79) for N. caninum. In addition, to presenting a significant and simultaneous seroprevalence for both agents (9.9% of the animals), the results also indicate that deficiencies in management and environmental sanitation, the presence of reservoirs, and types of exploitation enhance the seropositivity. Thus, studies like this might support sanitary programs and public policies for the prevention of T. gondii and N. caninum in the sheep herds of Paraná state.



2011 ◽  
Vol 7 ◽  
pp. S370-S370 ◽  
Author(s):  
Eleonora Dorsi ◽  
André Xavier ◽  
Ione Schneider ◽  
Maruí Corseuil ◽  
Luiz Ramos


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