Publications by authors named "Marco A Callegari"

Vaccination is a strategy in pig farming for the control of several pathogens, but commercial vaccines may have detrimental side effects. This study aimed to evaluate the effects of commercial vaccines on the control of porcine circovirus type 2 (PCV2), (Mhp), and (. ) and their potential side effects on welfare, behavior, acute inflammation biomarkers (C-reactive protein and haptoglobin), and the performance of piglets during the nursery phase.

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  • The study investigated how yeast cell wall prebiotics and probiotics affect gut health, immune response, and growth in weaned piglets as alternatives to antibiotic growth promoters.
  • Results showed that the feed conversion ratio (FCR) was significantly better in piglets on the yeast treatments compared to those receiving antibiotics, with the best performers being those on the yeast cell wall diet alone.
  • The introduction of probiotics appeared to enhance levels of certain immune markers, while also altering gut microbiota composition, particularly increasing the presence of beneficial Lactobacillus species in the probiotic groups.
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  • * Three piglets, aged 20-35 days old, were examined post-mortem after showing signs of neurological disease, leading to the identification of significant damage in the grey matter of their spinal cords and brainstems.
  • * This marks the first documented case of PAstV3 in piglets with neurological disorders in Brazil, emphasizing the need for continued monitoring of health issues that could affect pig farming efficiency and animal welfare.
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Objective: The objective of this study was to evaluate the use of condensed tannin from black acacia (Acacia mearnsii) as a substitute additive for zinc oxide and growth-promoting antibiotics on the performance, digestibility, and intestinal health of piglets in the nursery phase.

Methods: A total of 200 PIC piglets that were 22 days old and weighed 6.0±0.

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The objective of this study was to evaluate the inclusion of the autolyzed yeast (AY) with or without an immunomodulator (1,3/1,6 β-glucans) as a total/partial substitute for blood plasma (BP) in the diet of post-weaning piglets; zootechnical performance, intestinal health and microbiota, immune responses and energy metabolism were assessed. A total of 240 castrated male and female piglets, with a mean age of 22 days and mean initial weight of 5.24 ± 0.

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The effects of supplementing the diet of sows with βG-(1,3) derived from algae were assessed regarding quality and amount of colostrum as well as performance of piglets. A total of 120 sows (first (nulliparous) to sixth parity (multiparous)) from D85 of gestation until weaning were divided into two groups: the control diet group (n = 60) and the βG-(1,3) diet group (n = 60). Sows receiving βG-(1,3) exhibited an average increase of 870 g (24.

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The objective of this study was to evaluate the effect of essential oils plus dry herbs (PHYTO) and encapsulated sodium butyrate (BUT) supplementation compared with enramycin (ENR), as a growth promoter, on the performance, diarrhoea control and intestinal microbiota in lightly weaned piglets. Two hundred weaned piglets, 20 days old, 4.69 ± 0.

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The effects of increasing doses of bacterial phytase () on performance and carcass characteristics of growing-finishing pigs was evaluated. A total of 120 barrows weighing 25.16 ± 2.

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  • - The study tested the effects of two sources of methionine (DL-Methionine and OH-Methionine) and two dosages (100% and 120% of sulfur amino acids) on the growth and carcass traits of pigs, using a randomized block design with 200 pigs.
  • - Results showed that higher sulfur amino acid levels led to increased daily feed intake and weight gain, particularly during the growing phase, with overall daily weight gain improving from 0.86 kg to 0.90 kg.
  • - While no significant interaction between methionine source and SAA levels was observed for carcass traits, pigs receiving OH-Met had greater loin depth and those on higher methionine doses
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Background: Intestinal health remains a key factor in animal production because it is essential for digestion, absorption and bacterial fermentation. Feed additives have been used to attenuate the weaning stress such as Zinc Oxide (ZnO) and benzoic acid (CHO). The objective of this study was to evaluate the impact of of benzoic acid and probiotics (BA + P) on performance, diarrhea and cecal microbiota of piglets in the nursery phase (23 to 65 days).

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This study was to evaluate the effect of xylanase supplementation and the addition of live yeast, on growth performance and intestinal microbiota in piglets. One hundred and eighty commercial crossbred 23-d-old piglets (PIC 417) were sorted by initial BW and allocated to 3 treatments: control (CTR) diet, CTR diet supplemented with xylanase at 16,000 birch xylan units/kg (XYL) and XYL diet supplemented with live yeast (2 × 10 CFU/g) at 1 kg/t (XYL + LY). Each treatment had 10 replicates, with 6 animals each.

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The objective of this study was to evaluate the effect of increasing doses of bacterial phytase (RONOZYME HiPhos) on performance and carcass characteristics of growing and finishing pigs. The study included 120 castrated males with initial weight of 23.21 ± 1.

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