Surveillance of arbovirus infections in the atlantic forest region, State of São Paulo, Brazil: I. detection of hemagglutination-inhibition antibodies in wild birds between 1978 and 1990

Abstract

We report data related to arbovirus antibodies detected in wild birds periodically captured from January 1978 to December 1990 in the counties of Salesópolis (Casa Grande Station), Itapetininga and Ribeira Valley, considering the different capture environments. Plasmas were examined using hemagglutination-inhibition (HI) tests. Only monotypic reactions were considered, except for two heterotypic reactions in which a significant difference in titer was observed for a determined virus of the same antigenic group. Among a total of 39,911 birds, 269 birds (0.7%) belonging to 66 species and 22 families were found to have a monotypic reaction for Eastern equine encephalitis (EEE), Venezuelan equine encephalitis (VEE), Western equine encephalitis (WEE), Ilheus (ILH), Rocio (ROC), St. Louis encephalitis (SLE), SP An 71686, or Caraparu (CAR) viruses. Analysis of the data provided information of epidemiologic interest with respect to these agents. Birds with positive serology were distributed among different habitats, with a predominance of unforested habitats. The greatest diversity of positive reactions was observed among species which concentrate in culture fields.

Systematic and pathologic study of Paratanaisia bragai (Santos, 1934) Freitas, 1959 (Digenea, Eucotylidae) infestation in ruddy ground dove Columbina talpacoti (Temminck, 1811)

“…This bird has often been investigated for ecto and endoparasites, since the species is adapted either to wild or urban environmental conditions, commonly sharing food with sparrows and pigeons in the cities, in residential areas and mainly in the vicinities of pet shops, where captive exotic birds and small rodents are maintained for sale; thus, with the possibility of acting as reservoirs and carriers of pathogenic agents mainly to Galliformes hosts from backyard flocks or other avian hosts of economic importance, specimens of C. talpacoti are referred in surveys of acari ( Arzua and BarrosBattesti, 1999;Price et al, 1999) protozoa (Adriano et al, 2000;Adriano and Cordeiro, 2001 ) viruses (Ferreira et al;1994;Pereira et al, 2001) and helminths, that are the main target of this investigation.…”

Epitope-Blocking Enzyme-Linked Immunosorbent Assays for the Detection of Serum Antibodies to West Nile Virus in Multiple Avian Species

“…Of particular relevance to North American surveillance programs is SLEV, as this virus has a close antigenic and genetic relationship to WNV, is maintained in nature in similar transmission cycles, and has been isolated from wild birds (2,7,27). Furthermore, SLEV is endemic throughout the United States, particularly in the central and eastern states and in the southwest.…”

Influence of the CCR-5/MIP-1 α Axis in the Pathogenesis of Rocio Virus Encephalitis in a Mouse Model

“…Thus, ROCV may represent a threat to public health. 7,8 Chemokines are an important group of small secreted proteins (8-14 kD) of the immune response that are involved in numerous aspects of trafficking, tissue localization, and activation of leukocytes. 9,10 Although some chemokines are considered usually homeostatic by their implication in trafficking of specific cells under physiologic conditions, other chemokines have pro-inflammatory properties and their production is induced in response to immunologic, inflammatory, infectious signals.…”