scholarly journals Milk quality and its technological suitability for processing after the disinfection of the udder teats in cows

2021 ◽  
Vol 845 (1) ◽  
pp. 012100
Author(s):  
A V Filatova ◽  
Yu V Bibaeva ◽  
M V Nistratova ◽  
S V Kozlov ◽  
A V Molchanov ◽  
...  
Keyword(s):  
Subclinical Mastitis ◽  
Milk Quality ◽  
Hazard Class ◽  
Staph Aureus ◽  
E Coli ◽  
Preclinical Evaluation ◽  
Economic Experience ◽  
Before And After ◽  
Disinfectant Solution ◽  
Number Of Bacteria

Abstract Experiments on the study of preclinical evaluation of disinfectants based on chlorhexidine bigluconate hydrochloride / aloe tree oil (CGB aloe) and polyhexamethylene biguanide hydrochloride / eucalyptus oil (Teasfoam Supercow) showed their low hazard when exposed to warm-blooded animals. Disinfectants are assigned to the fourth hazard class according to GOST 12.1.007-76. The concentration of Staph. aureus, Strep. agalactiae was lower when teats were immersed in Teasfoam Supercow disinfectant solution before and after milking, compared to untreated teats. It is concluded that the application of CGB aloe is very efficient against Staph. aureus, Strep. Agalactiae, E. coli and Strep. uberis. Based on the results of scientific and economic experience, it can be concluded that controlled disinfection of the udder teats with a disinfectant CGB aloe before and after milking cows with high milk yield does not prevent udder teat hyperkeratosis in 2.4% of animals. In addition, subclinical mastitis is diagnosed in 12.1%; 3.3% of cows during the disinfection of the udder teats with Teasfoam Supercow were diagnosed hyperkeratosis of the udder teats. Another 12.9% of animals had subclinical mastitis. Udder teats of control animals were not disinfected. Udder hyperkeratosis was diagnosed in 5.4% of cows. Another 26.5% of the animals fell ill with subclinical mastitis. In cows, after controlled disinfection of the udder teats, an increase in milk production by 1-2 liters was observed. No color, taste or odor changes were observed in the milk. It has been proven that teats disinfection reduces the number of bacteria on the teats skin, improves the sanitary milk quality and its manufacturability.

Microbiological Effects of Hand Washing at a Beef Carcass–Breaking Facility†

2003 ◽  
Vol 66 (3) ◽  
pp. 493-496 ◽  
Author(s):  
C. O. GILL ◽  
J. C. McGINNIS
Keyword(s):  
Escherichia Coli ◽  
Hand Washing ◽  
E Coli ◽  
Before And After ◽  
Disinfectant Solution ◽  
The Mean ◽  
Beef Carcass

The hands of workers in the carcass-breaking facility at a beef packing plant were sampled by rinsing. Total aerobes, coliforms, and Escherichia coli were enumerated for each sample. The numbers of bacteria recovered from duplicate groups of 25 hand samples collected before and after hands were washed with an antibacterial gel, rinsed in a disinfectant solution, washed with the gel and rinsed with the disinfectant, or washed in the disinfectant for 20 s were similar for samples collected before work began after breaks. The numbers of bacteria recovered from samples collected before and after hands were washed with the antibacterial gel and rinsed in the disinfectant solution were similar for samples collected after work as well. However, the mean numbers of aerobes recovered from the four groups of hand samples after work were all >6.5 log CFU per hand, while 9 of the 10 corresponding values for groups of hand samples collected before work were <6.5 log CFU per hand; the total numbers of coliforms recovered from three groups of hand samples collected after work were >4 log CFU/25 hands, while 9 of the corresponding values for groups of hand samples collected before work were <4 log CFU/25 hands. The total numbers of E. coli recovered from all groups of hand samples collected after work were >3.5 log CFU/25 hands, while 9 of the corresponding values for groups of hand samples collected before work were <3 log CFU/25 hands. Thus, although washing and/or rinsing apparently did not reduce the numbers of bacteria on hands, fewer bacteria were recovered from hands before than after work.

Disinfection of Water and Wastewater Using ZnO Nanofluids - Effect of Shaking Speed of Incubator

2011 ◽  
Vol 183-185 ◽  
pp. 2298-2302 ◽  
Author(s):  
Ling Ling Zhang ◽  
Su Qin Li ◽  
Xiao Ming Liu ◽  
Da Qiang Cang ◽  
Yu Long Ding
Keyword(s):  
Chemical Species ◽  
Antimicrobial Activities ◽  
Physical Interaction ◽  
Counting Method ◽  
E Coli ◽  
Zno Particles ◽  
Before And After ◽  
Water And Wastewater ◽  
Zno Nanofluids ◽  
Number Of Bacteria

Nanofluids are liquids containing nanoparticles, nanotube or nanowire suspensions. This work investigates the disinfection properties of ZnO nanofluids, especially the change of ZnO disinfection properties when facing different shaking speeds of incubator (50rpm, 100rpm, 200rpm and 300rpm). In this work, E. coli was used as model bacteria to test the disinfection property of ZnO nanofluids. Plant counting method was used to examine the number of bacteria before and after the treatment of ZnO nanofluids. The results demonstrate that both ZnO nanofluids sample A and B could inhibit or kill E. coli bacteria. ZnO sample B with smaller particle size showed better antimicrobial activities. Treated with higher concentration of ZnO sample B exhibited better antimicrobial activities. Besides, this work also demonstrated that with higher shaking speed of incubator, ZnO nanofluids showed better antimicrobial activities. The antimicrobial mechanism is thought to be associated with physical interaction between ZnO particles and the biological cells and enhanced mass transfer of possible chemical species produced due to the presence of ZnO particles.

scholarly journals Distribution, etiology and prevention of subclinical mastitis in cows

2019 ◽  
Vol 2 (2) ◽  
pp. 18-21
Author(s):  
R. M. Sachuk ◽  
Ya. S. Stravsky ◽  
A. M. Shevchenko ◽  
O. A. Katsaraba ◽  
Ye. Ye. Kostyshyn ◽  
...  
Keyword(s):  
Subclinical Mastitis ◽  
Milk Quality ◽  
Control Group ◽  
Cell Content ◽  
Film Forming ◽  
Before And After ◽  
Breast Inflammation ◽  
Experimental Group ◽  
Observation Period ◽  
Daily Milk

According to the results of the diagnostic stage of obstetric examination in 2016–2018, the etiology and pathogenesis of mastitis in 90 cows of FG “Mriia” of Rivne region were analyzed. During the research, 83.3 % of the cows were diagnosed with breast inflammation. Subclinical form of udder inflammation was found in 51.1 %, clinical in 32.2 %, and at the same time hidden and clinical, in the same proportion – in 12.2 % of animals. In the farm, the cause of mastitis, were violations of sanitary and hygienic conditions of keeping cows and systematic technological underdevelopment of specialists in zootechnical and veterinary services. Frequent postpartum pathologies, including postpartum paresis and ketosis, contributed to the development of the disease. The experimental data for the study of the prophylactic and therapeutic effect of “Forticept” udder hygiene products on the condition of the breast, milk quality and cow productivity are presented. The “Forticept Udder Wash” antiseptic is used to prepare the udder for milking, and the “Forticept Udder Forte” film-forming agent is used to preserve udder nipples after milking is completed. It is established that the treatment, before and after milking, of the udder of cows by means of the “Forticept” complex, after 15 days allows to reduce significantly (by 55 %) the number of animals with subclinical mastitis (SFM). Within 30 days of “Forticept Udder Wash” and “Forticept Udder Forte”, the incidence of SFM in the cows of the experimental group decreased from the starting 41.7 % to 19.0–23.0 %. Hygienic treatment of the cows udder with the drugs “Kenopur” and “Kenocidin” did not give the desired effect of reducing the manifestations of SFM: on the 30th day of the experiment, the number of positive milk samples in the control group increased by 4.0 % (up to 54 %). Оn the thirty-day “Forticept” series, only one new case of subclinical mastitis was diagnosed in the experimental group. The preventive effect of “Forticept Udder Wash” and “Forticept Udder Forte” on SFM is 96.0 %, in the preparations “Kenopur” and “Kenocidin” – 70.0 %. Reducing the incidence rate naturally contributed to the increase in daily milk yields, the improvement of milk quality indicators for fats, protein, casein and a decrease in the content of SC, KMAFanM1 and microorganisms. In the animals of the experimental group, the level of somatic cells was 339.14 ± 21.22 thousand/ml by the end of the observation period and was 26.7 % lower than the control group. At that, the number of quarters of the breast with somatic cell content more than 400 thousand/ml of milk decreased in both groups, namely: in the experimental group – by 19.0 %, in the control group – by 15.1 %.

DECONTAMINATION OF VETERINARY SURVEILLANCE OBJECTS BY NEW GENERATION MEDICINE

1970 ◽  
pp. 64-67
Author(s):  
М. S. Saypullaev ◽  
А. U. Koychuev ◽  
Т. B. Mirzoeva
Keyword(s):  
Staphylococcus Aureus ◽  
Inhalation Exposure ◽  
Gram Negative Bacteria ◽  
Hazard Class ◽  
E Coli ◽  
Highly Efficient ◽  
Mucous Membranes ◽  
Environmentally Safe ◽  
New Generation ◽  
And Staphylococcus Aureus

The successful conduct of disinfection measures largely depends on the availability of veterinary practice a highly efficient, environmentally safe disinfectants. In this regard, finding new highly efficient disinfectant remains relevant. Studies found that the "Polied" (OOO "Razvitie XXI Vek, Russia) can be attributed to the highly efficient and environmentally friendly means. Solutions "Polied" have a high disinfectant activity against smooth and rough surfaces in the laboratory against gram-positive, gram-negative bacteria, mycobacteria and spores of microorganisms. Studies have established that solutions should be "Polied" obezzarajivatmi E. coli (EA 1257) concentrations of 0.1% on smooth surfaces and Staphylococcus aureus concentration of 0.05% in 1 hour from the calculation of 0.25-0.3 litres/m2. Disinfection of rough test surfaces against Escherichia coli and Staphylococcus aureus occurred after treatment with 0,3% solution of 3-hour exposure, at a rate of 0.5 l/m2. It was also found that 1.0% solution "Polied" fully obezzarazhivatel test the surface of mycobacteria (PCs-5) and at double the 0.6% concentration for 24 hours. Disinfection of rough test surfaces contaminated with spores of B. cereus (PCs 96) was achieved with a 4.0% solution at twice the irrigation rate of 0.5 l/m2 at an exposure of 24 hours. Toxicity solutions of the drug "Polied" refer to "moderate" threat (hazard class 3) and low-hazard substances (4 hazard class) when applied to the skin, mucous membranes of the eyes, and inhalation exposure on the respiratory system.

APPLICATION OF THE ATP-BIOLUMINESCENCE METHOD TO ASSESS THE QUALITY OF SANITATION OF MILKING EQUIPMENT

2020 ◽  
Vol 1 (4) ◽  
pp. 468-472
Author(s):  
P.A. Popov ◽  
◽  
D.V. Gruznov ◽  
S.V. Tokarev ◽  
◽  
...  
Keyword(s):  
Dairy Farms ◽  
Laboratory Studies ◽  
Before And After ◽  
Atp Bioluminescence ◽  
Microbial Number ◽  
Proportional Relationship ◽  
The Relationship ◽  
Number Of Bacteria ◽  
Bioluminescence Method

The article presents the results of determining the relationship between the total microbial number and microbial ATP on the surface of milking equipment before and after treatment with neutral anolyte ANK-SUPER. The possibility of using the ATP-bioluminescence method to control the quality of sanitation of milking equipment on dairy farms is shown. Laboratory studies revealed a proportional relationship between the level of bacterial ATP and the number of bacteria on the surface of milking equipment before and after sanitation.

scholarly journals Characterization of Escherichia coli Strains Derived from Cow Milk of Subclinical and Clinical Cases of Mastitis

2021 ◽  
Vol 11 (2) ◽  
pp. 541
Author(s):  
Katarzyna Grudlewska-Buda ◽  
Krzysztof Skowron ◽  
Ewa Wałecka-Zacharska ◽  
Natalia Wiktorczyk-Kapischke ◽  
Jarosław Bystroń ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacterial Species ◽  
Subclinical Mastitis ◽  
Clinical Mastitis ◽  
Economic Problem ◽  
Cow Milk ◽  
P Value ◽  
Dairy Herds ◽  
E Coli ◽  
Bonferroni Test

Mastitis is a major economic problem in dairy herds, as it might decrease fertility, and negatively affect milk quality and milk yield. Out of over 150 bacterial species responsible for the udder inflammation, Escherichia coli is one of the most notable. This study aimed to assess antimicrobial susceptibility, resistance to dipping agents and biofilm formation of 150 E. coli strains isolated from milk of cows with subclinical and clinical mastitis. The strains came from three dairy herds located in Northern and Central Poland. The statistical analyses were performed with post-hoc Bonferroni test and chi-square test (including Yates correction). The data with a p value of <0.05 were considered significant. We found that the tested strains were mostly sensitive to antimicrobials and dipping agents. It was shown that 37.33% and 4.67% of strains were resistant and moderately resistant to at least one antimicrobial agent, respectively. No extended-spectrum beta-lactamases (ESBL)-producing E. coli were detected. The majority of strains did not possess the ability to form biofilm or formed a weak biofilm. The strong biofilm formers were found only among strains derived from cows with subclinical mastitis. The lowest bacteria number was noted for subclinical mastitis cows’ strains, after stabilization with iodine (3.77 log CFU × cm−2) and chlorhexidine (3.96 log CFU × cm−2) treatment. In the present study, no statistically significant differences in susceptibility to antibiotics and the ability to form biofilm were found among the strains isolated from cows with subclinical and clinical mastitis. Despite this, infections in dairy herds should be monitored. Limiting the spread of bacteria and characterizing the most common etiological factors would allow proper treatment.

scholarly journals Airborne Dissemination of Bacteria (Enterococci, Staphylococci and Enterobacteriaceae) in a Modern Broiler Farm and Its Environment

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1783
Author(s):  
Susana Sanz ◽  
Carmen Olarte ◽  
Raquel Hidalgo-Sanz ◽  
Laura Ruiz-Ripa ◽  
Rosa Fernández-Fernández ◽  
...  
Keyword(s):  
Selective Media ◽  
E Coli ◽  
Predominant Species ◽  
Bacterial Dissemination ◽  
Low Emission ◽  
Broiler Farm ◽  
Cardinal Directions ◽  
Dna Profiles ◽  
Number Of Bacteria

The role of the air as a vehicle of bacteria dissemination in the farming environment has been previously reported, but still scarcely studied. This study investigated the bacteria density/diversity of the inside and outside air and of litter samples at a broiler farm. Samples were collected considering two seasons, three outside air distances (50/100/150 m) and the four cardinal directions. Selective media was used for staphylococci, enterococci, and Enterobacteriaceae recovery. A high number of bacteria was detected in the litter (2.9 × 105–5.8 × 107 cfu/g) and in the inside air (>105 cfu/m3), but a low emission of bacteria was evidenced in the outside air (<6 cfu/m3). Moreover, the bacteria detected in the farm’s outside air decreased the further from the farm the sample was taken. A total of 544 isolates were identified by MALDI-TOF (146 from the litter, 142 from inside air and 256 from outside air). From these, 162 staphylococci (14 species; S. saprophyticus 40.7%), 176 Enterobacteriaceae (4 species; E. coli 66%) and 190 enterococci (4 species; E. hirae 83%) were detected. E. hirae was the predominant species, and identical PFGE clones were detected in inside and outside samples. The detection of identical DNA profiles in E. hirae isolates from inside and outside samples suggests the role of the air in bacterial dissemination from the inside of the broiler farm to the immediate environment.

Gentamicin

1967 ◽  
Vol 5 (10) ◽  
pp. 39-40
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Staph Aureus ◽  
E Coli ◽  
Gentamicin Sulphate

Gentamicin sulphate (Cidomycin - Roussel; Genticin - British Schering) is an antibiotic related to the kanamycin group. It is produced by fermentation from an actinomycete, Micromonospora purpurea, and has a wide and unusual range of antibacterial activity.1 2 Most strains of E. coli, the Klebsiella-Aerobacter group, and all species of Proteus are highly or moderately susceptible to the drug, as are the smaller number of Shigella and Salmonella species so far tested. In this respect its range resembles that of kanamycin but, in addition, gentamicin is active against most strains of Pseudomonas aeruginosa (pyocyanea), thus combining the antibacterial activity of kanamycin with that of the polymyxins (to which Proteus is resistant). Gentamicin is also active against Staph. aureus, but streptococci are only moderately sensitive, and enterococci are often resistant.

A Comparison of Hand Washing Techniques To Remove Escherichia coli and Caliciviruses under Natural or Artificial Fingernails

2003 ◽  
Vol 66 (12) ◽  
pp. 2296-2301 ◽  
Author(s):  
CHIA-MIN LIN ◽  
FONE-MAO WU ◽  
HOI-KYUNG KIM ◽  
MICHAEL P. DOYLE ◽  
BARRY S. MICHAELS ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Tap Water ◽  
Hand Washing ◽  
Microbial Populations ◽  
Liquid Soap ◽  
E Coli ◽  
Hand Sanitizer ◽  
Before And After ◽  
Escherichia Coli Jm109 ◽  
Viral Indicators

Compared with other parts of the hand, the area beneath fingernails harbors the most microorganisms and is most difficult to clean. Artificial fingernails, which are usually long and polished, reportedly harbor higher microbial populations than natural nails. Hence, the efficacy of different hand washing methods for removing microbes from natural and artificial fingernails was evaluated. Strains of nonpathogenic Escherichia coli JM109 and feline calicivirus (FCV) strain F9 were used as bacterial and viral indicators, respectively. Volunteers with artificial or natural nails were artificially contaminated with ground beef containing E. coli JM109 or artificial feces containing FCV. Volunteers washed their hands with tap water, regular liquid soap, antibacterial liquid soap, alcohol-based hand sanitizer gel, regular liquid soap followed by alcohol gel, or regular liquid soap plus a nailbrush. The greatest reduction of inoculated microbial populations was obtained by washing with liquid soap plus a nailbrush, and the least reduction was obtained by rubbing hands with alcohol gel. Lower but not significantly different (P &gt; 0.05) reductions of E. coli and FCV counts were obtained from beneath artificial than from natural fingernails. However, significantly (P ≤ 0.05) higher E. coli and FCV counts were recovered from hands with artificial nails than from natural nails before and after hand washing. In addition, microbial cell numbers were correlated with fingernail length, with greater numbers beneath fingernails with longer nails. These results indicate that best practices for fingernail sanitation of food handlers are to maintain short fingernails and scrub fingernails with soap and a nailbrush when washing hands.

Multiplex Quantitative PCR Assays for the Detection and Quantification of the Six Major Non-O157 Escherichia coli Serogroups in Cattle Feces†

2016 ◽  
Vol 79 (1) ◽  
pp. 66-74 ◽  
Author(s):  
P. B. SHRIDHAR ◽  
L. W. NOLL ◽  
X. SHI ◽  
B. AN ◽  
N. CERNICCHIARO ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Quantitative Pcr ◽  
Foodborne Pathogens ◽  
Virulence Genes ◽  
Target Genes ◽  
Culture Methods ◽  
Fecal Samples ◽  
E Coli ◽  
Cattle Feces ◽  
Before And After

ABSTRACT Shiga toxin–producing Escherichia coli (STEC) serogroups O26, O45, O103, O111, O121, and O145, called non-O157 STEC, are important foodborne pathogens. Cattle, a major reservoir, harbor the organisms in the hindgut and shed them in the feces. Although limited data exist on fecal shedding, concentrations of non-O157 STEC in feces have not been reported. The objectives of our study were (i) to develop and validate two multiplex quantitative PCR (mqPCR) assays, targeting O-antigen genes of O26, O103, and O111 (mqPCR-1) and O45, O121, and O145 (mqPCR-2); (ii) to utilize the two assays, together with a previously developed four-plex qPCR assay (mqPCR-3) targeting the O157 antigen and three virulence genes (stx1, stx2, and eae), to quantify seven serogroups and three virulence genes in cattle feces; and (iii) to compare the three mqPCR assays to a 10-plex conventional PCR (cPCR) targeting seven serogroups and three virulence genes and culture methods to detect seven E. coli serogroups in cattle feces. The two mqPCR assays (1 and 2) were shown to be specific to the target genes, and the detection limits were 4 and 2 log CFU/g of pure culture–spiked fecal samples, before and after enrichment, respectively. A total of 576 fecal samples collected from a feedlot were enriched in E. coli broth and were subjected to quantification (before enrichment) and detection (after enrichment). Of the 576 fecal samples subjected, before enrichment, to three mqPCR assays for quantification, 175 (30.4%) were quantifiable (≥4 log CFU/g) for at least one of the seven serogroups, with O157 being the most common serogroup. The three mqPCR assays detected higher proportions of postenriched fecal samples (P &lt; 0.01) as positive for one or more serogroups compared with cPCR and culture methods. This is the first study to assess the applicability of qPCR assays to detect and quantify six non-O157 serogroups in cattle feces and to generate data on fecal concentration of the six serogroups.

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