Assessment of the chemical adulteration and hygienic quality of raw cow milk in the northwest of Iran

Moosavy, Mir‐Hassan; Kordasht, Houman Kholafazad; Khatibi, Seyed Amin; Sohrabi, Hessamaddin

doi:10.3920/qas2019.1605

Cited by 26 publications

(17 citation statements)

References 16 publications

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“…Milk and dairy products provide excellent growth conditions for many opportunistic pathogenic microorganisms that cause food spoilage and disease [ 6 ]. Over the past decades, warnings about microbial food contamination have increased.…”

Section: Introductionmentioning

confidence: 99%

Multiple Antimicrobial Resistance and Heavy Metal Tolerance of Biofilm-Producing Bacteria Isolated from Dairy and Non-Dairy Food Products

Ejaz

Junaid

Yasmeen

et al. 2022

Foods

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Foodborne pathogens have acquired the ability to produce biofilms to survive in hostile environments. This study evaluated biofilm formation, antimicrobial resistance (AMR), and heavy metal tolerance of bacteria isolated from dairy and non-dairy food products. We aseptically collected and processed 200 dairy and non-dairy food specimens in peptone broth, incubated them overnight at 37 °C, and sub-cultured them on various culture media. Bacterial growth was identified with biochemical tests and API 20E and 20NE strips. The AMR of the isolates was observed against different antibacterial drug classes. Biofilm formation was detected with the crystal violet tube method. Heavy metal salts were used at concentrations of 250–1500 µg/100 mL to observe heavy metal tolerance. We isolated 180 (50.4%) bacteria from dairy and 177 (49.6%) from non-dairy food samples. The average colony-forming unit (CFU) count for dairy and non-dairy samples was 2.9 ± 0.9 log CFU/mL and 5.1 ± 0.3 log CFU/mL, respectively. Corynebacterium kutscheri (n = 74), lactobacilli (n = 73), and Staphylococcus aureus (n = 56) were the predominant Gram-positive and Shigella (n = 10) the predominant Gram-negative bacteria isolated. The correlation between biofilm formation and AMR was significant (p < 0.05) for most cephalosporins, aminoglycosides, and fluoroquinolones. Heavy metal tolerance tended to be higher in biofilm producers at different metal concentrations. The pathogens isolated from dairy and non-dairy food showed a high burden of AMR, high propensity for biofilm formation, and heavy metal tolerance, and pose an imminent threat to public health.

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Section: Introductionmentioning

confidence: 99%

Multiple Antimicrobial Resistance and Heavy Metal Tolerance of Biofilm-Producing Bacteria Isolated from Dairy and Non-Dairy Food Products

Ejaz

Junaid

Yasmeen

et al. 2022

Foods

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“…Milk is an important source of macro-and micronutrients in the diet of humans and other mammals (Haug et al 2007;Yilmaz-Ersan et al 2018;Moosavy et al 2019). It contains many essential nutrients such as lipids, proteins, amino acids, vitamins, carbohydrates and minerals (Moosavy et al 2019;Miao et al 2020). Bovine milk is commonly used for human consumption in many countries.…”

Section: Introductionmentioning

confidence: 99%

“…It contains many essential nutrients such as lipids, proteins, amino acids, vitamins, carbohydrates and minerals (Moosavy et al . 2019; Miao et al . 2020).…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the antibacterial properties of milk from different domestic animals

Ebrahimi

Moosavy

Khatibi

et al. 2021

Int J of Dairy Tech

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This study aimed to compare the antimicrobial properties of milk from donkey, horse, goat, sheep, cow and camel. The antibacterial properties of samples were analysed against foodborne pathogenic bacteria held at 5, 10 and 20°C during 96 h of storage. The highest antimicrobial activity was obtained with donkey and horse milk at 20°C after 96 h. This study has highlighted the variations in the antibacterial properties of the milk from various animal species. The extent of antibacterial activity of milk was shown to depend upon the animal species, the storage temperature and the bacterial strain studied.

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“…and Mycobacterium spp. (Lee et al, 2012;Moosavy et al, 2019;Mullan, 2019). Moreover, milk may also contain increased somatic cell counts (SCC), mainly formed by leukocytes from blood origin and epithelial cells from scaling-off as a consequence of inflammation of the mammary gland (Fagundes et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Typical examples of milk adulteration include the addition of water to increase milk yield, incorporation of salt or other thickening agents Seasonal variations in some quality parameters of milk produced in Khorasan Razavi Province, Iran such as starch to restore the physical-chemical parameters of water-diluted milks, and the addition of chemical preservatives like hydrogen peroxide, caustic soda, detergents and formalin (Iqbal, 2017). In Iran, adulteration practices of raw milk have been recently documented in the provinces of East Azerbaijan (Mahmoudi et al, 2015), Qazvin (Panahzadeh et al, 2016) and in the Iranian northwest region (Moosavy et al, 2019). However, there is little information on the occurrence of adulteration practices along with other quality parameters of milk produced in the Iranian Province of Khorasan Razavi, which is one of the most important milk producers in Iran.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variations in some quality parameters of milk produced in Khorasan Razavi Province, Iran

et al. 2021

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In this trial, 60 samples of raw cow's milk collected during summer and winter in five collective centers from Khorasan Razavi Province of Iran were analyzed for penicillin residues, somatic cell counts (SCC), mesophilic counts (TMC) and adulteration materials. The mean penicillin level (0.57 ± 0.20 μg/L) was much lower than the maximum permitted level (MPL) recommended by the Codex Alimentarius Commission (4 μg/L). However, the mean SCC and TMC (Log 5.71 ± 0.08 cells/mL and Log 6.18 ± 0.11 colony forming units (CFU)/mL, respectively) exceeded their respective MPLs adopted in Iran for grade C milk (Log 5.69 cells/mL and Log 6.0 CFU/mL, respectively), with higher counts (P < 0.05) in the summer. High frequencies of samples containing salt (53-60%), detergents (16-20%) and formalin (7-10%) were observed in milk samples, stressing the need for stringent control measures to improve the quality of milk delivered in the evaluated collection centers.

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Assessment of the chemical adulteration and hygienic quality of raw cow milk in the northwest of Iran

Cited by 26 publications

References 16 publications

Multiple Antimicrobial Resistance and Heavy Metal Tolerance of Biofilm-Producing Bacteria Isolated from Dairy and Non-Dairy Food Products

Multiple Antimicrobial Resistance and Heavy Metal Tolerance of Biofilm-Producing Bacteria Isolated from Dairy and Non-Dairy Food Products

A comparative study of the antibacterial properties of milk from different domestic animals

Seasonal variations in some quality parameters of milk produced in Khorasan Razavi Province, Iran

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