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C.S. Astolfi-Ferreira
University of São Paulo
20Publications
7H-index
201Citations
Publications 20
Newest
#1W.M. Quinteiro-Filho (USP: University of São Paulo)H-Index: 12
#2Atilio Sersun Calefi (USP: University of São Paulo)H-Index: 7
Last.João Palermo-Neto (USP: University of São Paulo)H-Index: 30
view all 9 authors...
Abstract A high ambient temperature is a highly relevant stressor in poultry production. Heat stress (HS) has been reported to reduce animal welfare, performance indices and increase Salmonella susceptibility. Salmonella spp. are major zoonotic pathogen that cause over 1 billion of human infections worldwide annually. Therefore, the current study was designed to analyze the effect of heat stress on Salmonella infection in chickens through modulation of the immune responses. Salmonella Enteritidi...
16 CitationsSource
#1L. F. N. Nuñez (USP: University of São Paulo)H-Index: 5
#2Lilian Rose Marques de Sá (USP: University of São Paulo)H-Index: 3
Last.Antonio José Piantino Ferreira (USP: University of São Paulo)H-Index: 24
view all 6 authors...
Enteric disorders are an important cause of economic losses in broiler chickens worldwide. Several agents have been associated with enteric problems, such as viruses, bacteria, and parasites. In this study, broiler chickens showing signs of enteric disorders were subjected to molecular diagnosis for several viral agents and also for pathological examination for elucidating this problem. Thus, the chickens were screened for avian nephritis virus (ANV), chicken astrovirus (CAstV), avian rotavirus ...
6 CitationsSource
#1Anderlise Borsoi (USP: University of São Paulo)H-Index: 2
#2W.M. Quinteiro-Filho (USP: University of São Paulo)H-Index: 12
Last.João Palermo-Neto (USP: University of São Paulo)H-Index: 30
view all 7 authors...
We analysed the effects of cold stress (19 ± 1°C, 6 h /day, from the first to the seventh day of life) applied to specific pathogen free (SPF) chickens. On experimental Day 1 (ED1), chicks were divided into four groups: C (not infected and kept under thermoneutral condition); CS (not infected and cold stressed); PC (Salmonella Heidelberg (SH) infected and kept under thermoneutral condition) and PCS (SH infected and cold stressed). High concentrations of corticosterone were found in the cold stre...
7 CitationsSource
#1Jorge Luis Chacón (USP: University of São Paulo)H-Index: 9
#2Luis Fabian N Nuñez (USP: University of São Paulo)H-Index: 5
Last.Antonio José Piantino Ferreira (USP: University of São Paulo)H-Index: 24
view all 6 authors...
Infectious laryngotracheitis (ILT) is a highly infectious respiratory disease that causes morbidity and mortality in commercial chickens. Despite the use of attenuated vaccines, ILT outbreaks have been described in broiler and long-lived birds. Molecular approaches, including polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and DNA sequencing, are used to characterize ILT viruses (ILTVs) detected in vaccinated and unvaccinated geographical regions. As part of an ILT ...
4 CitationsSource
#1L. F. N. Nuñez (USP: University of São Paulo)H-Index: 5
#2S. H. Santander-Parra (USP: University of São Paulo)
Last.Ajp Ferreira (USP: University of São Paulo)H-Index: 4
view all 4 authors...
Introducao: O parvovirus de galinha (ChPV) e um DNA virus que tem sido relacionado em avicultura com problemas entericos, principalmente com a sindrome do nanismo e retardo do crescimento. A doenca causa grandes perdas economicas na avicultura pela diminuicao do ganho de peso, queda na conversao alimentar e mortalidade. O presente trabalho investigou se o ChPV desenvolve doenca enterica em aves infectadas experimentalmente. Metodos: aves SPF foram inoculadas com a suspensao viral de ChPV isolado...
#1Shs Parra (USP: University of São Paulo)H-Index: 1
#2L. F. N. Nuñez (USP: University of São Paulo)H-Index: 5
Last.Jp Ferreira (USP: University of São Paulo)H-Index: 1
view all 4 authors...
Infectious laryngotracheitis is a very important respiratory disease because it causes significant economic losses in the poultry industry. The target of ILTV infections is the respiratory system, and the main organ in which the virus remains latent is the trigeminal ganglia. However, the virus has demonstrated tropism for other organs as well. The present study was conducted to determine the presence of Infectious Laryngotracheitis Virus (ILTV) in the state of Sao Paulo. Samples submitted to LA...
3 CitationsSource
#1L. F. N. Nuñez (USP: University of São Paulo)H-Index: 5
#2S. H. Santander Parra (USP: University of São Paulo)H-Index: 2
Last.A. J. Piantino Ferreira (USP: University of São Paulo)H-Index: 6
view all 5 authors...
Abstract1. The presence of parvovirus in chickens with enteric disease was investigated in commercial flocks in Brazil.2. The intestinal contents of chickens exhibiting clinical signs of diarrhoea, weight loss or mortality were examined, and chicken parvovirus (chPV) was identified using a polymerase chain reaction (PCR) assay. The samples were sequenced and inoculated into specific-pathogen-free (SPF) embryonated eggs to isolate the virus.3. Necropsies showed that the embryos were dwarfish, hae...
4 CitationsSource
#1Luciana Allegretti (USP: University of São Paulo)H-Index: 3
#2L. Revolledo (USP: University of São Paulo)H-Index: 6
Last.Antonio José Piantino Ferreira (USP: University of São Paulo)H-Index: 24
view all 7 authors...
In Brazil, the blue-fronted Amazon parrot (Amazona aestiva) is a common pet. The faecal microbiota of these birds include a wide variety of bacterial species, the majority of which belong to the Gram-positive lactic acid bacteria (LAB) clade. The aim of this study was to investigate differences in the diversity and abundance of LAB and Bifidobacterium spp. in the cloacae between wild and captive birds and to select, identify and characterise LAB for consideration as a parrot probiotic. Cloacal s...
7 CitationsSource
#1João Palermo-Neto (USP: University of São Paulo)H-Index: 30
#2W.M. Quinteiro-Filho (USP: University of São Paulo)H-Index: 12
Last.A.V. Gomes (USP: University of São Paulo)H-Index: 3
view all 10 authors...
Overcrowding stress is a reality in the poultry industry. Chickens exposed to long-term stressful situations present a reduction of welfare and immunosuppression. We designed this experiment to analyze the effects of overcrowding stress (16 birds/m 2 ) on performance parameters, serum corticosterone levels, the relative weight of the bursa of Fabricius, plasma IgA and IgG levels, intestinal integrity, macrophage activity and experimental Salmonella Enteritidis invasion. The overcrowding stress d...
Source
#1Jorge Luis Chacón (USP: University of São Paulo)H-Index: 9
#2M. S. Assayag (USP: University of São Paulo)H-Index: 3
Last.A. J. Piantino Ferreira (USP: University of São Paulo)H-Index: 6
view all 7 authors...
Abstract1. The possibility that infectious bronchitis virus (IBV) variants isolated from broilers with enteric and respiratory problems have a different tropism and pathological outcome from those IBV strains causing classical respiratory disease was investigated.2. IBV variants were isolated from broiler flocks with enteric and respiratory problems in two regions of Brazil. The USP-10 isolate, of enteric origin, was inoculated via the oral oroculonasal routes into IBV-antibody-free broilers and...
11 CitationsSource
12