A Comparative Study on the Physicochemical Parameters and Trace Elements in Raw Milk Samples Collected from Misurata- Libya

2014 ◽  
Vol 1 (2) ◽  
pp. 15-23 ◽  
Author(s):  
M. Elbagermi ◽  
◽  
H. Edwards ◽  
A. Alajtal
Keyword(s):  
Trace Elements ◽  
Comparative Study ◽  
Physicochemical Parameters ◽  
Raw Milk ◽  
Milk Samples

Concentrations of macroelements and trace elements in milk of Jersey cows

2016 ◽  
Author(s):  
Natalia Proskura ◽  
Joanna Podlasinska ◽  
Witold Stanislaw Proskura ◽  
Anna Frost-Rutkowska ◽  
Andrzej Dybus ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Raw Milk ◽  
Toxic Heavy Metals ◽  
Milk Samples ◽  
Spearman Coefficient ◽  
Wet Weight ◽  
Positive Correlations ◽  
Jersey Cows ◽  
Pb Concentration

The aim of the study was to determine concentration of macroelements (P, Ca, Mg, Na, K), and some microelements, including toxic heavy metals (Cr, Fe, Mn, Zn, Cu, Co, Pb, Cd and Hg) in milk of Jersey cows. Milk samples were collected from Jersey cows kept in tie-stall barn in Greater Poland Province. The feeding was based on total mixed ration mixture. The maximum permitted level of Pb concentration in raw milk (0.02 mg/kg wet weight)was significantly exceeded (0.063±0.035 mg/dm3). The content of Hg was very low (0.106±0.057 μg/dm3).Significant (P£0.05) Spearman coefficient correlations were observed between contents of some elements in milk. Especially interesting were positive correlations of heavy metals: Cd-Cr, Co-Mn, Cr-Zn, Mn-Zn. Additionally the content of Ca was positively correlated with numerous elements: Hg, Cr, Cu, Mn, Zn, Mg, and negatively correlated with the content of Fe.

scholarly journals Spectrophotometric Quantification of Trace Elements and Toxic Metals in Raw Milk Samples of Peshawar City, Pakistan

2021 ◽  
Vol 12 (1) ◽  
pp. 53-59
Author(s):  
Nadir Khan ◽  
Rizwan Ullah ◽  
Fazal Wahid ◽  
Qamar Sultana ◽  
Muhammad Rahim
Keyword(s):  
Trace Elements ◽  
Freezing Point ◽  
Physicochemical Characterization ◽  
Raw Milk ◽  
Average Concentration ◽  
Toxic Heavy Metals ◽  
Average Percentage ◽  
Milk Samples ◽  
Permissible Limits ◽  
Fe And Mn

The present study focused on the physicochemical characterization and spectrophotometric determination of the concentrations of trace elements (Zn, Cu, Fe and Mn) and toxic heavy metals (Cd and Pb) in raw milk samples collected from various commercial sites of Peshawar city, Pakistan. Evaluation of the nutritional values as well as the possible health concerns associated with the consumption of contaminated milk shown the average percentage composition of protein, fats, solid non-fats, lactose, salts and added water in the milk sample as 2.78, 4.81, 6.41, 3.05, 0.47 and 31.1 %, respectively. The values of pH, conductivity, density and freezing point were observed as 6.59, 3.51 mS/cm, 1.04 g/mL and -0.3674 ºC at 26 ºC. The physicochemical characteristics such as percentage protein, fat, lactose, salts, water, solid not fat, total solids, pH, conductivity and density were evaluated and found in the safe limits of the WHO/FAO. The average concentration of trace elements such as zinc and copper were found to be 1.4035 mg/L and 0.2588 mg/L, respectively. The concentration of Zn and Cu was found within permissible limits suggested by WHO. However, the average concentration of Fe, Mn, Cd and Pb were found higher than the permissible limits of WHO. The observed concentrations were: Fe = 1.5553, Mn = 0.4354, Cd = 0.1865 and Pb = 1.1162 mg/L. The presence of the non-essential and hazardous Cd and Pb in milk samples even in lower concentrations may cause severe health problems since these are the most noxious pollutants due to their non-biodegradable and bio-accumulative nature. Over-dose of Fe and Mn also leads to several health issues. A thorough and more precise investigation of raw milk consumption in Peshawar is highly recommended to ascertain the actual reasons and sources in the larger public interests.

scholarly journals Concentration of trace elements in raw milk depending on the lactation period and age of cows

2011 ◽  
Vol 80 (2) ◽  
pp. 203-206 ◽  
Author(s):  
Alina Górska ◽  
Krystyna Oprządek
Keyword(s):  
Trace Elements ◽  
Absorption Spectrometry ◽  
Raw Milk ◽  
Cow Milk ◽  
Lactation Period ◽  
Milk Samples ◽  
Fresh Milk ◽  
Holstein Friesian ◽  
White Breed ◽  
The Subject

Concentrations of iron, zinc, manganese and copper in milk from cows of Polish Holstein – Friesian Black-White breed kept on five farms located in the southern Podlasie region in Poland were determined and analysed depending on the lactation period and age of cows. Milk samples were taken separately from each cow, 18 samples from one farm. A total of 90 milk samples were taken. Cows were in three age classes (lactation number): 1, 2-3 and >3, and four lactation periods (duration): ): ≤ 100, 101–200, 201–305 and > 305 days). The concentration of trace elements in milk was determined using atomic absorption spectrometry method. Average concentrations of the elements in 1 kg of fresh milk were the following: iron 173 ± 84 µg, zinc 3.6 ± 0.9 mg, manganese 27 ± 17 µg and copper 40 ± 23 µg. A relation between the age of cows and the concentrations of iron was observed. The lowest contents of iron (145 ± 72 µg·kg-1) were observed in the milk from the youngest cows in their first lactation, whereas the highest contents (217 ± 70 µg·kg-1) were observed in the milk from the oldest cows above the third lactation. No relation between the age of cows and the concentrations of zinc, manganese and copper in milk was observed. Similarly, no significant differences between the contents of these elements in different lactation periods were observed. Study on factors influencing the concentrations of trace elements in cow milk were undertaken because researches on the subject are not numerous.

scholarly journals Prevalence of Mastitis and Antibiotic Resistance of Bacterial Isolates from CMT Positive Milk Samples Obtained from Dairy Cows, Camels, and Goats in Two Pastoral Districts in Southern Ethiopia

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1530
Author(s):  
Amanuel Balemi ◽  
Balako Gumi ◽  
Kebede Amenu ◽  
Sisay Girma ◽  
Muuz Gebru ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Dairy Cows ◽  
Raw Milk ◽  
Multidrug Resistant ◽  
Southern Ethiopia ◽  
Resistant Bacteria ◽  
Coagulase Negative Staphylococcus ◽  
Bacterial Isolates ◽  
E Coli ◽  
Milk Samples

A study was carried out from August 2017 to February 2018 on lactating dairy cows, one-humped dromedary camels, and goats to determine mastitis in the Bule Hora and Dugda Dawa districts of in Southern Ethiopia. Milk samples from 564 udder quarters and udder halves from 171 animals consisting of 60 dairy cows, 51 camels, and 60 goats were tested for mastitis. Sixty-four positive udder milk samples were cultured, and bacterial mastitis pathogens were isolated and identified. The antibiotic resistance of bacterial isolates from milk with mastitis was tested against nine antimicrobials commonly used in the study area. Cow- and quarter-level prevalence of mastitis in dairy cows, camels, and goats was 33.3%, 26.3%, and 25% and 17.6%, 14.5%, and 20%, respectively. In cattle, the prevalence was significantly higher in Dugda Dawa than in Bule Hora. Major bacterial isolates were coagulase-negative Staphylococcus species (39.1%), S. aureus (17.2%), S. hyicus (14.1%), and S. intermedius and Escherichia coli (9.4% each). In camels, udder abnormality and mastitis were significantly higher in late lactation than in early lactation. Mastitis tends to increase with parity in camels. E. coli isolates were highly resistant to spectinomycin, vancomycin, and doxycycline, whereas most S. aureus isolates were multidrug-resistant. Most of the rural and periurban communities in this area consume raw milk, which indicates a high risk of infection with multidrug-resistant bacteria. We recommend a community-focused training program to improve community awareness of the need to boil milk and the risk of raw milk consumption.

scholarly journals MOLECULAR DETECTION AND CHARACTERIZATION OF STAPHYLOCOCCUS AUREUS ISOLATED FROM RAW MILK SOLD IN DIFFERENT MARKETS OF BANGLADESH

2017 ◽  
Vol 14 (2) ◽  
pp. 277-282 ◽  
Author(s):  
M. A. Islam ◽  
S. M. L. Kabir ◽  
M. T. Rahman
Keyword(s):  
Molecular Detection ◽  
Culture Media ◽  
Raw Milk ◽  
Rrna Gene ◽  
Biochemical Tests ◽  
Selective Media ◽  
Milk Samples ◽  
Antimicrobial Sensitivity ◽  
Antimicrobial Sensitivity Test

The study was intended for molecular detection of S. aureus isolated from raw cow’s milk. A total of 20 milk samples were collected from different upazila markets of Jamalpur, Tangail, Kishoreganj and Netrokona districts of Bangladesh. Milk samples were cultured onto various culture media for the isolation of bacteria. The isolated bacteria were identified by studying cultural properties on different selective media, biochemical tests, and finally by PCR. Out of 20 samples, 15 (75%) milk samples were found to be positive for S. aureus. S. aureus specific 16S rRNA gene was amplified from all isolates and identified as S. aureus. Antimicrobial sensitivity test was carried out to ascertain the susceptibility of the organism to various antibiotics. Its results showed that the S. aureus isolates were resistant to amoxicillin (100%), erythromycin (73.33%) and tetracycline (73.33%) but sensitive to azithromycin (93.33%), ciprofloxacin (93.33%), gentamicin (100%), norfloxacin (86.67%) and streptomycin (86.67%).

scholarly journals Bulk tank somatic cell count and associated microbial quality of milk from selected dairy cattle herds in Oyo State, Nigeria

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Olufemi Olatoye ◽  
Adesola Amosun ◽  
Uzo Ogbu ◽  
Yemi Okunlade
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Health Management ◽  
Development Program ◽  
Raw Milk ◽  
Human Consumption ◽  
Quality And Safety ◽  
Milk Samples ◽  
California Mastitis Test

Improvement of traditional and nomadic milk production through dairy development program in Nigeria requires routine quality and safety monitoring of milk both at herd level and milk collection centers. A total of 411 bulk raw milk samples aseptically obtained from Ibarapa, Oyo and Oke-Ogun industrial milk collection centers were subjected to California Mastitis Test (CMT), Bulk Somatic Cell Count (BSCC) and bacteriological analysis for assessment of quality and safety of milk from the herds. One hundred and seven (26.0%) of the samples were CMT positive, while 74.0% were negative to CMT. The overall mean BSCC, TAC and TCC were 1.27×103 ± cells/mL, 1.12×103± 34 cfu/mL, 97.8±9.8 cfu/mL in the CMT negative milk samples while for the strong positive samples the mean BSCC, TAC and TCC were 4.33×106 ± cells/mL, 2.35×106 ± 453 cfu/mL, 189.3±41.1 cfu/mL respectively; these were higher than the Pasteurized Milk Ordinance acceptable limits. Positive correlation was found between CMT scores and bacterial contamination and between CMT scores and SCC was recorded. About 26.0% of the samples with positive CMT could be considered unsafe due to strong correlation with microbial contamination that could result in milk borne zoonoses and public health hazards. However, a greater proportion (76.9%) of the milk with negative CMT scores could be safe for human consumption after post-harvest pasteurization. Consequently, there is need to improve handling, environmental and milking hygiene; as well as proper herd and udder health management to improve quality and safety of Nigeria dairy products.

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