scholarly journals Ticks infesting wild small rodents in three areas of the state of São Paulo, Brazil

2016 ◽  
Vol 46 (5) ◽  
pp. 871-875 ◽  
Author(s):  
Thiago Fernandes Martins ◽  
Marina Gea Peres ◽  
Francisco Borges Costa ◽  
Thais Silva Bacchiega ◽  
Camila Michele Appolinario ◽  
...  
Keyword(s):  
Sao Paulo ◽  
Species Level ◽  
São Paulo ◽  
Small Rodents ◽  
Wild Rodents ◽  
Morphological Examination ◽  
Paulo State ◽  
The Mean ◽  
Oligoryzomys Flavescens ◽  
Mitochondrial Rdna

ABSTRACT: From May to September 2011, a total of 138 wild rodents of the Cricetidae family were collected in the cities of Anhembi, Bofete and Torre de Pedra, in São Paulo State. All animals were examined for the presence of ticks, which were collected and identified at species level in the laboratory by morphological examination (for adults, nymphs and larvae) and molecular biology, by sequencing of a fragment of the 16S mitochondrial rDNA (for larvae). A total of 47 ticks (21 larvae and 26 nymphs) were collected from rodents, identified as 21 larvae and 23 nymphs of Amblyomma ovale (collected on Oligoryzomys nigripes , Oligoryzomys flavescens , Sooretamys agouya and Nectomys squamipes ), two nymphs of Ixodes schulzei (O. nigripes and O. flavescens ) and an Amblyomma sculptum nymph in S. agouya . The overall prevalence of parasitism by A. ovale was 4.3% for larvae, and 10.1% for nymphs. The mean intensity of parasitism was 3.5 larvae/parasitized animal, and 1.6 nymphs/parasitized animal. One O. nigripes was found parasitized by both larva and nymph of A. ovale , and another O. nigripes was parasitized simultaneously by an I. schulzei nymph and five A. ovale nymphs. This research reports the following unpublished records: A. ovale on O. flavescens , O. nigripes and S. agouya ; A. sculptum on S. agouya ; and I. schulzei on O. flavescens and O. nigripes .

scholarly journals Protozooplankton and its relationship with environmental conditions in 13 water bodies of the Mogi-Guaçu basin - SP, Brazil

2013 ◽  
Vol 13 (4) ◽  
pp. 152-163 ◽  
Author(s):  
Inessa Lacativa Bagatini ◽  
Ana Lúcia Gerardi Spínola ◽  
Bianca de Miranda Peres ◽  
Adrislaine da Silva Mansano ◽  
Mafalda Alexandra Antunes Rodrigues ◽  
...  
Keyword(s):  
Environmental Variables ◽  
Sao Paulo ◽  
Water Bodies ◽  
Bromophenol Blue ◽  
São Paulo ◽  
Paulo State ◽  
Two Samples ◽  
São Paulo State ◽  
Biological Aspects ◽  
The Mean

Protozooplankton is an important component of the aquatic microbial food webs and its composition, density, and distribution reflect the chemical, physical, and biological aspects of the environment. Considering the scarce literature on freshwater protozoans in Brazil and on protozoan ecology in subtropical environments, we listed the ciliates and amoebae taxa found in 13 water bodies in São Paulo State and analyzed their abundance in relation to the environmental variables. We collected two samples in each environment, fixed immediately with mercuric chloride and stained with bromophenol blue. After microscopical analysis, 74 protozoan genera were identified and the Ciliophora were dominant in the majority of the environments. The Stichotrichia, represented mostly by the genus Halteria, occurred in all environments, and was the dominant subclass in five of them. The canonic correspondence analysis of the most frequent genera and the environmental variables showed that nitrite and nitrate were the variables that better explained the distribution of Limnostrombidium, Urotricha, and Vorticella. The densities of the genera Halteria, Coleps, and of the species Cinetochilum margaritaceum were positively affected by increasing concentrations of dissolved oxygen, particulate phosphate, conductivity, and temperature. C. margaritaceum were also negatively affected by increasing concentrations of nitrite and nitrate. Considering that we made only one sampling in each environment, the richness was high compared to the mean diversity of lakes in the São Paulo State. The Diogo Lake, located in an ecological reserve, was the richest one, confirming the need of more research on the biodiversity of more preserved environments.

scholarly journals Canine rabies epidemiology in Araçatuba and neighborhood, Northwestern São Paulo State - Brazil

2004 ◽  
Vol 37 (2) ◽  
pp. 139-142 ◽  
Author(s):  
Luzia Helena Queiroz da Silva ◽  
César Eduardo Bissoto ◽  
Ádna Cleia B. Delbem ◽  
Clara Isabel de Lucca Ferrari ◽  
Sílvia Helena Venturoli Perri ◽  
...  
Keyword(s):  
Urban Areas ◽  
Sao Paulo ◽  
São Paulo ◽  
Canine Rabies ◽  
Paulo State ◽  
São Paulo State ◽  
The Mean ◽  
Northwest Region ◽  
Epidemiological Characteristics ◽  
Rabies Diagnosis

Epidemiological characteristics of canine rabies in the northwest region of São Paulo State (Araçatuba region), Brazil, from 1993 to 1997 are presented. Out of 1,984 dogs, a total of 351 (17.7%) were positive for rabies diagnosis; 89% (312/351) of these occurred in urban areas and 85% (266/312) of the urban positive cases were among owned dogs. The mean age of the rabid dogs was 34 months and 61% were male. Aggressive behavior was observed in 77% of rabid dogs, followed by lack of coordination and paralysis (42%) and 48% of these dogs were responsible biting people or other animals. Information about vaccination status was obtained from 182 records and 51% of rabid dogs were non-vaccinated. The number of unvaccinated rabid dogs indicates a low vaccination index and this factor added to the high dog/man ratio must have contributed to the canine rabies epizootic observed in the studied area.

scholarly journals Helminth fauna of Astyanax fasciatus Cuvier, 1819, in two distinct sites of the Taquari River, São Paulo State, Brazil

2015 ◽  
Vol 75 (1) ◽  
pp. 242-250 ◽  
Author(s):  
AA Acosta ◽  
J. Queiroz ◽  
H. Brandão ◽  
RJ Silva
Keyword(s):  
Sao Paulo ◽  
Host Population ◽  
Helminth Fauna ◽  
São Paulo ◽  
New Host ◽  
Paulo State ◽  
Astyanax Fasciatus ◽  
São Paulo State ◽  
The Mean ◽  
Direct Cycle

This study assessed the helminth fauna of Astyanax fasciatus in two distinct sites of the Taquari River, São Paulo State, with 30 individuals sampled in a lotic site and 30 in a lentic site, recording the monogeneans: Cacatuocotyle paranaensis, Characithecium costaricensis, Diaphorocleidus kabatai, Jainus sp., Notozothecium sp. and Gyrodactylus sp., the digenean Antorchis lintoni and no-identified metacercariae; the nematode Procamallanus (Spirocamallanus) inopinatus and no-identified larvae. The mean abundances of total monogeneans (U = 1053; p = 0.042) and C. costaricensis (U = 1107; p = 0.005) were higher in the lotic site. This difference may be due to the higher density of the host population in the lotic site, and the water transparence in lentic environments that prevents A. fasciatus to form shoals, precluding the exchange of parasites with direct cycle within a host population. This study is the first report of the helminth fauna of A. fasciatus in the Taquari River, with ten taxa recorded, and reports A. fasciatus as a new host for Notozothecium sp. and C. paranaensis.

scholarly journals Vaccinia virus in feces of wild rodents from São Paulo State, Brazil

2016 ◽  
Vol 53 ◽  
pp. 128
Author(s):  
J. Megid ◽  
M.G. Peres ◽  
T. Bachiega ◽  
C.M. Appolinario ◽  
A.F. Vicente ◽  
...  
Keyword(s):  
Vaccinia Virus ◽  
Sao Paulo ◽  
São Paulo ◽  
Wild Rodents ◽  
Paulo State ◽  
São Paulo State

scholarly journals Evidence of hantavirus infection in wild rodents captured in a rural area of the state of São Paulo, Brazil

2004 ◽  
Vol 24 (2) ◽  
pp. 71-73 ◽  
Author(s):  
Elba Regina S. de Lemos ◽  
Paulo S. D'Andrea ◽  
Cibele R. Bonvicino ◽  
Kátia M. Famadas ◽  
Paula Padula ◽  
...  
Keyword(s):  
Sao Paulo ◽  
Hantavirus Infection ◽  
São Paulo ◽  
Wild Rodents ◽  
Myocastor Coypus ◽  
Suburban Areas ◽  
Andes Virus ◽  
Etiological Agents ◽  
Antigen Antibody ◽  
Oligoryzomys Flavescens

Hantaviruses are the etiological agents of the Hantavirus Cardio-Pulmonary Syndrome, a serious rodent-borne disease in Brazil. In order to investigate the occurrence of hantavirus infection in wild rodents, a survey was conducted in three different suburban areas of the municipality of Pedreira, State of São Paulo, Brazil. Of the 145 wild animals captured belonging to 12 different species identified by morphology and karyological analysis, 107 were rodents of the following species: Akodon montensis, Bolomys lasiurus, Calomys tener, Oligoryzomys nigripes, Oligoryzomys flavescens, and Myocastor coypus. Blood samples from these rodents were assayed for the presence of antibodies against hantavirus by IgG ELISA using Andes recombinant nucleocapsid antigen. Antibody reactive to Andes virus was found in two different species, O. nigripes and O. flavescens. These results indicate a potential risk for hantavirus transmission to humans in this area, where reservoir rodents are present in peridomestic settings.

scholarly journals Novel orthohepeviruses in wild rodents from São Paulo State, Brazil

Virology ◽  
2018 ◽  
Vol 519 ◽  
pp. 12-16 ◽  
Author(s):  
William Marciel de Souza ◽  
Marilia Farignoli Romeiro ◽  
Gilberto Sabino-Santos ◽  
Felipe Gonçalves Motta Maia ◽  
Marcilio Jorge Fumagalli ◽  
...  
Keyword(s):  
Sao Paulo ◽  
São Paulo ◽  
Wild Rodents ◽  
Paulo State ◽  
São Paulo State

scholarly journals Disaggregation of daily rainfall data for the Caraguatatuba city, in São Paulo State, Brazil

RBRH ◽  
2019 ◽  
Vol 24 ◽  
Author(s):  
Daniela Martins ◽  
Maria Luiza Teofilo Gandini ◽  
Nadiane Smaha Kruk ◽  
Paulo Ivo Braga Queiroz
Keyword(s):  
Daily Rainfall ◽  
Rain Gauge ◽  
Sao Paulo ◽  
São Paulo ◽  
Relative Deviation ◽  
Study Region ◽  
Mean Values ◽  
Paulo State ◽  
São Paulo State ◽  
The Mean

ABSTRACT The objective of this study is to present disaggregation coefficients for intense daily rainfalls for E2-046 rainfall station, located at Caraguatatuba, São Paulo state. The data obtained through rain gauge refer to a continuous period (31 years of series) and had a strong correlation with the measurements of the rain gauge, validating the pluviographs reading, which attributed greater reliability to the results. The average coefficient “24 hours”/“1-day” found for the study region was 1.075, which differs significantly from the values found in literature. The relative deviation considering other durations, and consequently other precipitation coefficients in relation to the mean values of the disaggregation values of the E2-046 station reached 22.06% (18 hours/“24 hours”). The relative deviation of rainfall disaggregation coefficients of the station studied in relation to the mean coefficients for the cities of São Paulo State to small durations was quite high, reaching almost 50% (10 minutes /“24 hours”). This reinforces the need of using local disaggregation coefficients.

scholarly journals New aerophytic morphospecies of Cyanobacteria from tropical forest fragments in northwestern São Paulo state, Brazil

2010 ◽  
Vol 24 (4) ◽  
pp. 916-923 ◽  
Author(s):  
Nadia Martins Lemes-da-Silva ◽  
Luis Henrique Zanini Branco ◽  
Orlando Necchi-Júnior
Keyword(s):  
Tropical Forest ◽  
Sao Paulo ◽  
Species Level ◽  
Forest Fragments ◽  
São Paulo ◽  
Paulo State ◽  
Terrestrial Environments ◽  
São Paulo State ◽  
Metrical Analysis

Algae and Cyanobacteria can colonize a wide variety of terrestrial environments and the assemblages from aerophytic habitats are very poorly known. During the survey of aerophytic algal and cyanobacterial communities in forest fragments in northwestern São Paulo state, six cyanobacteria populations could not be identified at species level and, after morphological and metrical analysis, proved to be new morphotypes to Science. Four belong to the genus Aphanothece (A. excentrica, A. coacervata, A. densa and A. vaginata), one to Phormidium (P. arboricola) and one to Hapalosiphon (H.santannae). This study presents the description, comparison and proposition of the new morphospecies and improves taxonomic knowledge of the diversity of the group.

scholarly journals Influence of Rainfall Seasonality in Groundwater Chemistry at Western Region of São Paulo State—Brazil

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1450
Author(s):  
Lais A. Maroubo ◽  
Marcos R. Moreira-Silva ◽  
José Jerônimo Teixeira ◽  
Marcos F. S. Teixeira
Keyword(s):  
Copper Ions ◽  
Rainfall Variability ◽  
Sao Paulo ◽  
Agricultural Activity ◽  
Western Region ◽  
São Paulo ◽  
Aquifer System ◽  
Paulo State ◽  
São Paulo State ◽  
The Mean

The present study evaluated the spatiotemporal variation in concentration of cadmium, lead and copper ions in groundwater wells in the stratigraphic subdivision “Santo Anastácio” that belongs to the Bauru aquifer system in the western region of São Paulo State. Exploratory statistics methods were employed to investigate the response of the concentration of these metals in the aquifer through the pluviometric index of the region. The results show a direct dependence of the mean monthly flow of the metals in the groundwaters to the monthly rainfall flow. The observed behavior was cyclic with a gradual increase and decrease in the flow throughout time. Two groups of cyclic variation were identified. The seasonality of the mean monthly flow of Cd2+ and Pb2+ was inversely proportional to the magnitude of the pluviometric index of the region studied. Meanwhile, the seasonality of Cu2+ was directly correlated to the seasonable rainfall variability. These behaviors lead us to point out that cadmium and lead come from minerals present in the aquifer itself and the presence of copper in groundwater is associated with an anthropogenic action due to the region’s agricultural activity. The study helps us better comprehend the behavior of the whole groundwater system through a comparison with temporal hydrogeochemistry.

scholarly journals Losses caused by Groundnut ringspot tospovirus in peanut crop in the State of São Paulo

2019 ◽  
Vol 40 (6Supl3) ◽  
pp. 3429
Author(s):  
Marcos Doniseti Michelotto ◽  
Willians César Carrega ◽  
Luis Eduardo Prado Lamana ◽  
Tamiris Marion de Souza ◽  
Ignácio José de Godoy ◽  
...  
Keyword(s):  
Plant Density ◽  
Sao Paulo ◽  
The State ◽  
Virus Species ◽  
São Paulo ◽  
Visual Symptoms ◽  
Paulo State ◽  
Peanut Crop ◽  
Plant Stand ◽  
The Mean

An increased incidence and severity of Orthotospovirus species has been observed in the peanut crop. The typical symptoms of the virus, usually known as ringspot in peanut and spotted wilt in other crops, include mosaic, chlorotic ring-shaped spots, necrosis, and plant stunting. This study aimed to verify the occurrence of this virus in peanut growing areas in the São Paulo State, Brazil, identify the predominant virus species, and determine losses resulting from the presence of this virus. Surveys were carried out in four peanut commercial areas sown in the municipalities of Santa Adélia and Cândido Rodrigues in the 2014/2015 season using the cultivar Granoleico. The following parameters were evaluated: plant stand, number of plants with symptoms, and severity of these symptoms through a scoring scale of visual symptoms. The results showed that the predominant virus species is Groundnut ringspot tospovirus (GRSV). Also, the lower the stand is, the higher the percentage of plants with virus symptoms. The mean incidence of GRSV in commercial peanut areas is 40%, with mean losses estimated at 38% when GRSV is present and 64% when there is the presence of virus and reduction in plant density.

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