A Study of the Microbiological Quality of Goat Milk in Quebec

1991 ◽  
Vol 54 (4) ◽  
pp. 263-266 ◽  
Author(s):  
PATRICK TIRARD-COLLET ◽  
JOHN A. ZEE ◽  
LUCIE CARMICHAEL ◽  
RONALD E. SIMARD
Keyword(s):  
Microbiological Quality ◽  
Goat Milk ◽  
Storage Tanks ◽  
Summer Period ◽  
Somatic Cell Counts ◽  
Microbial Counts ◽  
Cell Counts ◽  
One Year ◽  
Good Hygiene

The microbiological quality of goat milk collected at Quebec farms was observed over a one-year period. Microbial counts increased during the summer period. Only one farm had a total aerobic count of >105 CFU/ml in >50% of samples taken from storage tanks. Coliform counts were <103/ml even when the total aerobic count was 106/ml. No relationship between somatic cell counts and bacterial counts was found. Exponential bacterial growth began after a lag of at least 3 d at 0–4°C. Good hygiene, rapid cooling and refrigeration, as well as frequent collection by refrigerated vehicles, ensured the production of good quality milk.

Microbiological Quality of Commercial Tofu

1984 ◽  
Vol 47 (3) ◽  
pp. 177-181 ◽  
Author(s):  
T. G. REHBERGER ◽  
L. A. WILSON ◽  
B. A. GLATZ
Keyword(s):  
Microbiological Quality ◽  
Plate Count ◽  
Microbial Counts ◽  
Colony Forming Units ◽  
Low Levels ◽  
Microbial Groups ◽  
Yeasts And Molds ◽  
Processing Techniques

A study was done to investigate the microbiological quality of commercial tofu available in local retail outlets. A sampling method was first developed to obtain accurate and representative microbial counts of individual pieces of tofu. Plate count determination of total aerobic organisms, psychrotrophs, coliforms, sporeformers, yeasts and molds, and staphylococci were made on 60 tofu samples (representing three lots each of four different brands) obtained within 24 h after delivery to the retail store. In addition, for two brands that provided manufacturer's pull dates, the same microbial counts were obtained for samples stored in the laboratory at 10°C until the pull date. Of the tofu sampled immediately after purchase, 83% of the lots tested had total counts greater than 106 colony-forming units (CFU)/g and psychrotrophic counts greater than 104 CFU/g. In addition, 67% of the lots tested had confirmed coliform counts greater than 103 CFU/g. Very low levels (less than 10 CFU/g) of all other microbial groups tested for were found in the majority of lots. Samples held until the manufacturer's pull date contained higher total and psychrotrophic counts but lower or stable counts of other organisms compared with samples tested immediately after purchase. To improve the microbiological quality of tofu, processors need to reduce initial loads by improving sanitation and processing techniques, and retailers should provide more consistent and colder refrigerated storage.

scholarly journals Microbiological Quality of Raw Goat Milk in Bogor, Indonesia

2011 ◽  
Vol 34 (2) ◽  
pp. 105-111 ◽  
Author(s):  
E Taufik ◽  
G Hildebrandt ◽  
J N Kleer ◽  
T I Wirjantoro ◽  
K Kreausukon ◽  
...  
Keyword(s):  
Microbiological Quality ◽  
Goat Milk

Low Incidence of Foodborne Pathogens of Concern in Raw Milk Utilized for Farmstead Cheese Production

2008 ◽  
Vol 71 (8) ◽  
pp. 1580-1589 ◽  
Author(s):  
DENNIS J. D'AMICO ◽  
ERROL GROVES ◽  
CATHERINE W. DONNELLY
Keyword(s):  
Foodborne Pathogens ◽  
Microbiological Quality ◽  
Goat Milk ◽  
Raw Milk ◽  
Pasteurized Milk ◽  
Milk Samples ◽  
Cell Counts ◽  
Standard Plate ◽  
Low Incidence ◽  
Raw Milk Cheese

Overall milk quality and prevalence of four target pathogens in raw milk destined for farmstead cheesemaking was examined. Raw milk samples were collected weekly from June to September 2006 from 11 farmstead cheese operations manufacturing raw milk cheese from cow's, goat's, and sheep's milk. Samples were screened for Listeria monocytogenes, Staphylococcus aureus, Salmonella, and Escherichia coli O157:H7 both quantitatively (direct plating) and qualitatively (PCR). Overall, 96.8% of samples had standard plate counts of <100,000 CFU/ml, 42.7% of which were <1,000 CFU/ml. Although no federal standards exist for coliforms in raw milk, 61% of samples tested conformed to pasteurized milk standards under the U.S. Pasteurized Milk Ordinance (PMO) at <10 CFU/ml. All cow and sheep milk samples and 93.8% of goat milk samples were within the limits dictated by the PMO for somatic cell counts. Of the 11 farms, 8 (73%) produced samples that were positive for S. aureus, which was detected in 34.6% (46 of 133) of milk samples. L. monocytogenes was isolated from three milk samples (2.3%), two of which were from the same farm. E. coli O157:H7 was recovered from one sample of goat's milk for an overall incidence of 0.75%. Salmonella was not recovered from any of the 133 samples. The findings of this study suggest that most raw milk intended for farmstead cheesemaking is of high microbiological quality with a low incidence of pathogens. These data will help inform risk assessments associated with the microbiological safety of farmstead cheeses, particularly those manufactured from raw milk.

The influence of almond flour, inulin and whey protein on the sensory and microbiological quality of goat milk yogurt

LWT ◽  
2020 ◽  
Vol 124 ◽  
pp. 109138 ◽  
Author(s):  
Agata Mazzaglia ◽  
Veronika Legarová ◽  
Rossella Giaquinta ◽  
Carmela Maria Lanza ◽  
Cristina Restuccia
Keyword(s):  
Whey Protein ◽  
Microbiological Quality ◽  
Goat Milk

scholarly journals Influence of the microbiological quality of raw milk on the shelf life of pasteurized milk

2019 ◽  
Vol 40 (4) ◽  
pp. 1469
Author(s):  
José Carlos Ribeiro Júnior ◽  
Aline Marangon de Oliveira ◽  
Fernando Godoi Silva ◽  
Lorena Natalino Haber Garcia ◽  
Cátia Maria de Oliveira Lobo ◽  
...  
Keyword(s):  
Shelf Life ◽  
Microbiological Quality ◽  
Raw Milk ◽  
Poor Quality ◽  
Pasteurized Milk ◽  
Microbial Counts ◽  
Legal Standards ◽  
Milk Samples ◽  
Brazilian Standard

The dairy industry strives to produce high quality products with high nutritional value as well as to meet the legal standards for longer shelf life. However, these goals are made unfeasible by the poor quality of raw milk produced in some regions of Brazil. Others Brazilian dairy regions, however, already succeed in producing milk with low microbial counts, such as the municipality of Castro, Paraná state, designated as the ‘Brazilian dairy capital’. In order to evaluate the effect of raw milk quality on microbial counts during the shelf life of pasteurized milk, samples were collected from two dairy regions of Paraná: the northern and Castro region, characterized by milk production with high and low microbiological counts, respectively. Samples were experimentally pasteurized and the total microorganism counts were analyzed for 18 days at 7°C, using the Brazilian standard microbiological count limit for pasteurized milk (8 x 104 CFU/mL) as the end of the shelf life. Low microbiological counts in raw milk (Castro) resulted in significantly lower counts shortly after pasteurization and over the entire shelf life, meeting the pasteurized milk standard for 18 days. The temporal evolution in the counts over 18 days for the milks of high and low microbiological count was similar; however, the disparity between the absolute counts between the regions was significant (p < 0.05). Of the milk samples from northern Paraná, four (44.4%) already had counts higher than that of the legislative limit for pasteurized milk immediately after pasteurization. The others (five) reached the maximum microbiological count limit for pasteurized milk on the 6th day after pasteurization. In contrast, the milk from the Castro region remained below the limit throughout the analysis period. Thus, it can be stated that the microbiological quality of raw milk is directly related to the initial count of microorganisms after pasteurization, and that pasteurized milk produced from raw milk with low microbiological counts complies with the Brazilian legislation for 18 days following thermal processing.

scholarly journals The Effect of Exogenous Melatonin on Milk Somatic Cell Count in Buffalo

2021 ◽  
Vol 41 (01) ◽  
pp. 152-155
Author(s):  
Lin Feng
Keyword(s):  
Superoxide Dismutase ◽  
Somatic Cell ◽  
Somatic Cell Count ◽  
Environmental Temperature ◽  
Antioxidant Activities ◽  
Economic Loss ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Quality Of Milk

High somatic cell counts (SCCs) in milk significantly influence the quality of milk and give rise to substantial economic loss. The present study was aimed to investigate the effect of extreme heat and cold compared to other season and melatonin (MLT) on milk SCCs in Chinese crossbred (Nili-Ravi×Murrah) buffaloes. We collected the 1948 milk SCCs data records from 2012 to 2017 to explore the effect of different month in China on milk SCCs. Meanwhile, twenty buffaloes with relatively high milk SCCs were employed and randomly divided into two groups (T1 and T2, n=10 each group) to evaluate the effect of MLT treatment on milk SCCs, blood antioxidant activities and immune levels of buffaloes during summer in China. Results showed that the milk SCCs in high temperature seasons (July and August) and low temperature seasons (December, January and February) were significantly higher compared with other months (P<0.05). In summer, MLT treatment significantly reduced milk SCCs and increased the IgM and superoxide dismutase (SOD) levels in plasma on day 1 after MLT treatment, and then both IgM and SOD levels were decreased significantly. In conclusion, our study demonstrated that environmental temperature stress (heat and cold) caused the higher milk SCCs and MLT treatment improved the quality of milk by reducing SCCs suggesting that MLT could improve immune activity in buffaloes

scholarly journals Microbiological lettuce quality evaluation from traditional, organic and hydroponic growing process

2016 ◽  
Vol 7 (3) ◽  
pp. 82
Author(s):  
Greici Bergamo ◽  
Eliezer Avila Gandra
Keyword(s):  
Escherichia Coli ◽  
Microbiological Quality ◽  
Significant Relation ◽  
Salmonella Spp ◽  
Total Coliforms ◽  
Hygiene Practices ◽  
Lactuca Sativa L ◽  
The Moment ◽  
Good Hygiene

Objective of the study: to evaluate the microbiological quality of lettuce (Lactuca sativa L.) in three different cultivation: organic, hydroponic and traditional. Sixty lettuce samples commercialized in Videira – SC were analyzed. Microorganisms investigated: Salmonella spp., Listeria spp., total coliforms e Escherichia coli. The results showed the absence of Salmonella spp. for all samples. Present of Listeria spp. was found in 16,7% of the samples. Total coliforms e Escherichia coli count varied from <1x101 - 2,8x105 and <1x101 - 1x103, respectively. Traditional and hydroponic farming lettuce samples presented 100% of total coliforms. Escherichia coli analysis occurred in 22,2% of the samples traditional farming, 11,1% hydroponic farming and none in organic farming vegetables. Statistically, we found no significant relation between microbiological contamination and king of growing used in the vegetables production. The strains of the Listeria, total coliforms and Escherichia coli found in the samples indicated hygienic and sanitary quality and so it is important that good hygiene practices are taken from the manufacturing process until the moment of consumption.

scholarly journals Goat Milk Nutritional Quality Software-Automatized Individual Curve Model Fitting, Shape Parameters Calculation and Bayesian Flexibility Criteria Comparison

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1693 ◽  
Author(s):  
María Gabriela Pizarro Inostroza ◽  
Francisco Javier Navas González ◽  
Vincenzo Landi ◽  
Jose Manuel León Jurado ◽  
Juan Vicente Delgado Bermejo ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Dry Matter ◽  
Model Comparison ◽  
Minimum Mean Square Error ◽  
Goat Milk ◽  
Individual Performance ◽  
Information Criteria ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
The Individual

SPSS syntax was described to evaluate the individual performance of 49 linear and non-linear models to fit the milk component evolution curve of 159 Murciano-Granadina does selected for genotyping analyses. Peak and persistence for protein, fat, dry matter, lactose, and somatic cell counts were evaluated using 3107 controls (3.91 ± 2.01 average lactations/goat). Best-fit (adjusted R2) values (0.548, 0.374, 0.429, and 0.624 for protein, fat, dry matter, and lactose content, respectively) were reached by the five-parameter logarithmic model of Ali and Schaeffer (ALISCH), and for the three-parameter model of parabolic yield-density (PARYLDENS) for somatic cell counts (0.481). Cross-validation was performed using the Minimum Mean-Square Error (MMSE). Model comparison was performed using Residual Sum of Squares (RSS), Mean-Squared Prediction Error (MSPE), adjusted R2 and its standard deviation (SD), Akaike (AIC), corrected Akaike (AICc), and Bayesian information criteria (BIC). The adjusted R2 SD across individuals was around 0.2 for all models. Thirty-nine models successfully fitted the individual lactation curve for all components. Parametric and computational complexity promote variability-capturing properties, while model flexibility does not significantly (p > 0.05) improve the predictive and explanatory potential. Conclusively, ALISCH and PARYLDENS can be used to study goat milk composition genetic variability as trustable evaluation models to face future challenges of the goat dairy industry.

Sign in / Sign up

Export Citation Format

Share Document