Intoxicação de vacas leiteiras por farelo de algodão naturalmente contaminado com aflatoxinas

Gonçalez, Edlayne; Pinto, Marina Mori; Manginelli, Silvio; Felício, Joana D.

doi:10.1590/s0103-84782004000100026

Cited by 12 publications

(9 citation statements)

References 7 publications

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“…The supplementation of SCFP (S. cerevisiae fermentation product) consisting of yeast cells has been shown to increase DMI and milk yield, as well as milk fat and protein yield, in lactating dairy cows [42,45]. However, milk yield was decreased 3.0 L/day and concentration of milk fat and protein decreased after dairy cows were fed 43.5-120.0 µg of AFB 1 /kg of BW [48]. The reduction in milk protein concentration may be a consequence of the inhibition of microbial protein synthesis by AFB 1 [28].…”

Section: Effect On Feed Intake Nutrient Digestibility and Animal Permentioning

confidence: 99%

Effect of Supplemental Kluyveromyces marxianus and Pichia kudriavzevii on Aflatoxin M1 Excretion in Milk of Lactating Dairy Cows

Intanoo

Kongkeitkajorn

Suriyasathaporn

et al. 2020

Animals

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The objective of this study was to determine the effect of supplementing Kluyveromyces marxianus CPY1, K. marxianus RSY5 and Pichia kudriavzevii YSY2 isolated from ruminal fluid of dairy cows on transfer of aflatoxin B1 (AFB1) from feed into aflatoxin M1 (AFM1) in milk, DMI, milk production and nutrient digestibility. Four multiparous Holsteins in mid-lactation were used in a 4 × 4 Latin square design trial consisting of 14 days in each experimental period for sample collection. Between each period, 14 clearance days prior to the next treatment were allowed to minimize carryover effects. In each treatment, subsequent supplementation of isolated yeast was compared, i.e., (1) control (without yeast supplementation), (2) K. marxianus CPY1 (K1Y), (3) K. marxianus RSY5 (K2Y) and (4) P. kudriavzevii YSY2 (PY). All diets contained 22.28 µg of AFB1/kg. Treatments were individually fed at the rate of 2 g/day (1 × 109 CFU/g) of yeast biomass or corn meal in the control group. Concentrations of AFM1 in milk was reduced with yeast and averaged 1.54, 0.36, 0.43 and 0.51 µg/L for control, K1Y, K2Y and PY, respectively (p < 0.01). The transfer of AFB1 from feed into AFM1 in milk was higher in control compared with K1Y, K2Y and PY (7.26% vs. 1.18%, 1.44% and 1.69% respectively, p < 0.01). Supplementation of yeast also improved DMI and milk compositions, but no differences were observed in nutrient digestibility or milk yield among treatments. Concentration and yield of milk protein, fat, lactose, solid-not-fat (SNF) and total solids were greater in cows fed yeast compared with the control (p < 0.01). These results indicate that K. marxianus CPY1, RSY5 and P. kudriavzevii YSY2 shows promise as a dietary supplementation to detoxify AFB1 and improve DMI and yield of milk components.

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Section: Effect On Feed Intake Nutrient Digestibility and Animal Permentioning

confidence: 99%

Effect of Supplemental Kluyveromyces marxianus and Pichia kudriavzevii on Aflatoxin M1 Excretion in Milk of Lactating Dairy Cows

Intanoo

Kongkeitkajorn

Suriyasathaporn

et al. 2020

Animals

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“…They usually are ingredients very susceptible to contamination by mycotoxins and toxigenic fungi. Presence of mycotoxins in food for animal consumption was reported in different regions of Brazil (Sassahara et al, 2003;Gonçalez et al, 2004;Oliveira et al, 2008). A. flavus capable of producing CPA and aflatoxins were isolated from feed samples studied in this work (Silva et al, 2015).…”

Section: Resultsmentioning

confidence: 80%

“…Although most references in the literature report the presence of aflatoxin M1 in cow milk (Dorner et al, 1994;Galvano et al, 1996;Gonçalez et al, 2004;Oliveira et al, 2008), it is known that this toxin can easily occur in milk of sheep, goats, buffaloes and camels (Galvano et al, 1996;Motawee et al, 2009), but there are few reports about the presence of aflatoxin M1 in goat milk (Oliveira et al, 2007). Co-occurrence between AFM1 and CPA in bovine milk has been the subject of studies by other authors (Oliveira et al, 2008;Rosemaninho et al, 2006), however there are no reports about CPA in goat milk.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Mycotoxins in Feed for Goats and Their Residues in Milk

Freitas¹,

Felício²,

Chiebáo³

et al. 2015

JAS

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Aflatoxins are mainly produced by Aspergillus flavus and A. parasiticus, whereas A. flavus, under different conditions, also can produce cyclopiazonic acid (CPA). Several studies on mycotoxins in feed and cow milk have been reported, but the investigation of the co-occurrence of aflatoxins and CPA in feed and goat milk is an unprecedent study in Brazil. This study aimed to evaluate the presence of aflatoxins and cyclopiazonic acid in diets intended for dairy goats and their residues in milk in 10 familiar properties of Southwestern São Paulo region, totalizing 128 samples of feed and 120 samples of milk. Aflatoxins have been extracted and purified in an immunoaffinity column specific for aflatoxins B1 (AFB1), B2 (AFB2), G1 (AFG1) and G2 (AFG2) and aflatoxin M1 (AFM1). The analyses for detection and quantification of toxins were performed by high-performance liquid chromatography. From the analyses of the feeds, 2.34% of these were contaminated with aflatoxin at levels ranging from: 3.65 to 36.93 µg/kg for AFB1; 0.35 to 2.46 µg/kg for AFB2; trace to 46.06 µg/ kg for AFG1 and 0.61 to 1.65 µg/ kg for AFG2. One sample showed a concentration of 87.1 µg/kg, above that allowed by Brazilian law. Concerning CPA, 3.12% of the feed samples were positive for it at concentrations ranging from trace to 1.90 µg/kg. AFM1 and CPA were not detected in the milk samples. The results demonstrate that low contamination by mycotoxins in feeds and the absence of AFM1 and CPA in milk indicate best practices in the management and storage of these feeds.

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“…However, a few studies have reported contradictory results for the effects of AFB 1 on milk yield and composition. Gonçalez et al (2004) observed that 76.4 μg/kg of aflatoxins in the diet (43.5 μg of AFB 1 ) of dairy cows for 6 mo was sufficient to reduce the milk yield. Similar findings were reported by Queiroz et al (2012), with cows receiving 75 μg of AFB 1 /kg during a period of 12 d having lower levels of milk fat and protein.…”

Section: Introductionmentioning

confidence: 96%

Effects of different sources of Saccharomyces cerevisiae biomass on milk production, composition, and aflatoxin M1 excretion in milk from dairy cows fed aflatoxin B1

Gonçalves

Rosim

et al. 2017

Journal of Dairy Science

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The aim of the present study was to evaluate the effect of different sources of Saccharomyces cerevisiae (SC) biomass (20.0 g/d) obtained from sugarcane (cell wall, CW; dried yeast, DY; autolyzed yeast, AY) and the beer industry (partially dehydrated brewery yeast, BY) on milk production, fat and protein percentages, and aflatoxin M (AFM) excretion in milk from dairy cows receiving 480 µg aflatoxin B (AFB) per day. A completely randomized design was used with 2 lactating cows assigned to each of 10 dietary treatments, as follows: negative controls (no AFB or SC-based biomass), positive controls (AFB alone), DY alone, DY + AFB, BY alone, BY + AFB, CW alone, CW + AFB, AY alone, and AY + AFB. The cows in the aflatoxin treatment group received AFB from d 1 to 6, while the SC biomass was administered with the AFB bolus from d 4 to 6. Aflatoxin B or SC-based products did not affect milk production or milk composition during the experimental period. Aflatoxin M was detected in the milk from all aflatoxin treatment group cows, reaching maximum levels at d 3 and varying from 0.52 ± 0.03 to 1.00 ± 0.04 µg/L. At end of the treatment period, CW, AY, DY, and BY removed 78%, 89%, 45%, and 50% of AFM from the milk, respectively, based on the highest level found on d 3. Results indicate a potential application of industrial fermentation by-products, especially CW and AY, as a feed additive in the diets of dairy cows to reduce the excretion of AFM in milk.

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Intoxicação de vacas leiteiras por farelo de algodão naturalmente contaminado com aflatoxinas

Cited by 12 publications

References 7 publications

Effect of Supplemental Kluyveromyces marxianus and Pichia kudriavzevii on Aflatoxin M1 Excretion in Milk of Lactating Dairy Cows

Effect of Supplemental Kluyveromyces marxianus and Pichia kudriavzevii on Aflatoxin M1 Excretion in Milk of Lactating Dairy Cows

Monitoring of Mycotoxins in Feed for Goats and Their Residues in Milk

Effects of different sources of Saccharomyces cerevisiae biomass on milk production, composition, and aflatoxin M1 excretion in milk from dairy cows fed aflatoxin B1

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