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W.M. Quinteiro-Filho
University of São Paulo
40Publications
12H-index
663Citations
Publications 40
Newest
#1Atilio Sersun Calefi (USP: University of São Paulo)H-Index: 7
#2Catarina Augusta de Queiroz Nunes (USP: University of São Paulo)
Last.João Palermo-Neto (USP: University of São Paulo)H-Index: 30
view all 6 authors...
Abstract Heat stress has a relevant effect on animal health and productivity. Stress and environmental changes can contribute to disease development, such as avian necrotic enteritis (NE). The goal of this study was to analyze the effects of heat stress applied to broiler chickens in an experimental model of co-infection with Clostridium perfringens and Eimeria spp. Therefore, the current study was designed to analyze the effect of heat stress to broiler chickens in an experimental model of infe...
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#1Atilio Sersun Calefi (USP: University of São Paulo)H-Index: 7
#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 12 authors...
Abstract Information on the dynamics of the chicken immune system during bacterial or parasite challenge in the presence or absence of stressful situations may provide a better understanding of the complex mechanisms behind these diseases. Necrotic enteritis (NE) had been controlled previously by the proper use of antimicrobial agents; however, more recently, NE has reemerged in many countries. The imposed restrictions on antimicrobial use and/or the intensive productive programs implemented by ...
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Heat stress has been related to the impairment of behavioral and immunological parameters in broiler chickens. However, the literature is not clear on the involvement of neuroimmune interactions in a heat stress situation associated with bacterial and parasitic infections. The present study evaluated the production of monoamines and their metabolites in brain regions (rostral pallium, hypothalamus, brain stem, and midbrain) in broiler chickens submitted to chronic heat stress and/or infection an...
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#1Bahram Shojadoost (Ontario Veterinary College)H-Index: 5
#2Raveendra R. Kulkarni (Ontario Veterinary College)H-Index: 13
Last.Shayan Sharif (Ontario Veterinary College)H-Index: 37
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Abstract Macrophages are an important cell type of the innate immune system that upon activation, can exert antiviral functions and also can induce virus-specific adaptive immune responses. Macrophage interaction with certain probiotic bacteria such as lactobacilli can enhance antiviral functions of these cells. We have previously shown that administration of lactobacilli to chickens can effectively augment immune response to vaccine antigens. Here, we investigated the effects of representative ...
4 CitationsSource
#1Atilio Sersun Calefi (USP: University of São Paulo)H-Index: 7
#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 4 authors...
The intensification of poultry production has favoured the occurrence of stressful conditions such as infections, decreased feed intake, reduced feed conversion and carcass condemnation are some of the consequences of stress in birds. This stress is a consequence of the neuroendocrine-immune interplay. Neuroimmunomodulation is the scientific study of the bidirectional relation of the immune and nervous systems, i.e. , physiological effects in response to exposure of animals to stressful conditio...
3 CitationsSource
#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
#1Thalita R.M. Machado (USP: University of São Paulo)H-Index: 1
#2Glaucie Jussilane Alves (USP: University of São Paulo)H-Index: 8
Last.João Palermo-Neto (USP: University of São Paulo)H-Index: 30
view all 4 authors...
Abstract Cohabitation with Ehrlich ascitic tumor-injected conspecifics induces behavioral, neurochemical, endocrine and immune changes indicative of stress and immune impairment in female mice. The present work analyzed the effects of similar cohabitation in Swiss and Balb/C male mice. At least 12 pairs of male mice were divided into a control group and an experimental group. On experimental day 1 (ED1), one animal within each experimental pair was inoculated with 5 × 10 6 Ehrlich tumor cells in...
1 CitationsSource
#1Atilio Sersun Calefi (USP: University of São Paulo)H-Index: 7
#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 13 authors...
O estresse, importante fator limitante para a producao avicola modula a resposta imune e tem sido apontado como um dos principais fatores predisponentes para o desenvolvimento de doencas em frangos de corte. Investigacoes com a neuroimunomodulacao induzida pelo estresse por calor demonstraram que as alteracoes imunes e neurais ocorrem de forma sistemica e que sao capazes de influenciar a invasibilidade bacteriana e a lesao tecidual intestinal. O presente trabalho quantificou as expressoes relati...
The gut-brain axis is known to modulate behavioral and immune responses in animals; evidence supporting this modulation in chickens, however, is elusive. Here, we analyzed the effects of heat stress and/orClostridium perfringens (CP) infection on behavior, intestinal morphology, brain activity, and corticosterone serum levels in chickens. Broilers were randomly divided into 5 equal groups: a naive group (N), a thioglycolate group (T), a thioglycolate heat-stressed group (T/HS35), an infected gro...
9 CitationsSource
#1Atilio Sersun Calefi (USP: University of São Paulo)H-Index: 7
#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 10 authors...
Dexamethasone (DEX) is a corticoid hormone that is experimentally used to mimic the effects of increased levels of endogenous corticosterone observed during the stress response. Currently, stress is considered one of the major predisposing factors for diseases in the poultry industry. The aim of this study was to analyze the effects of DEX and/or of a 20-fold coccidial vaccine dose on leukocyte phenotypes in the spleen and cecal tonsils of chickens. Twenty specific-pathogen-free (SPF) Leghorn ch...
5 CitationsSource
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