scholarly journals The Pattern of Blood–Milk Exchange for Antiparasitic Drugs in Dairy Ruminants

Animals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2758
Author(s):  
Fernanda Imperiale ◽  
Carlos Lanusse

The prolonged persistence of milk residual concentration of different antiparasitic drugs in lactating dairy animals should be considered before recommending their use (label or extra-label) for parasite control in dairy animals. The partition blood-to-milk ratio for different antiparasitic compounds depends on their ability to diffuse across the mammary gland epithelium. The high lipophilicity of some of the most widely used antiparasitic drugs explains their high partition into milk and the extended persistence of high residual concentrations in milk after treatment. Most of the antiparasitic drug compounds studied were shown to be stable in various milk-related industrial processes. Thus, the levels of residues detected in raw milk can be directly applicable to estimating consumer exposure and dietary intake calculations when consuming heat-processed fluid milk. However, after milk is processed to obtain milk products such as cheese, yogurt, ricotta, and butter, the residues of lipophilic antiparasitic drugs are higher than those measured in the milk used for their elaboration. This review article contributes pharmacokinetics-based information, which is useful to understand the relevance of rational drug-based parasite control in lactating dairy ruminants to avoid undesirable consequences of residual drug concentrations in milk and derived products intended for human consumption.

2015 ◽  
Vol 78 (9) ◽  
pp. 1756-1759 ◽  
Author(s):  
T. ROMERO ◽  
M. C. BELTRÁN ◽  
W. REYBROECK ◽  
M. P. MOLINA

Microbial inhibitor tests are widely used to screen antibiotic residues in milk; however, these tests are nonspecific and may be affected by various substances capable of inhibiting the growth of the test microorganism. The objective of this study was to determine the effect of antiparasitic drugs in goat's milk on the microbial inhibitor test response. Raw antibiotic-free milk from Murciano-Granadina goats was supplemented with eight concentrations of seven antiparasitic substances (albendazole, 10 to 170 mg/kg; closantel, 1 to 140 mg/kg; diclazuril, 8 to 45 mg/kg; febendazole, 10 to 140 mg/kg; levamisole, 40 to 440 mg/kg; diazinon, 8 to 45 mg/kg; and ivermectin, 40 to 200 mg/kg). Twelve replicates for each concentration were analyzed with three microbial inhibitor tests: BRT MRL, Delvotest SP-NT MSC, and Eclipse 100. The results were interpreted visually (negative or positive). Using a logistic regression model, the concentrations of the antiparasitic drugs producing 5% (IC5), 10% (IC10), and 50% (IC50) positive results were determined. In general, the Eclipse 100 test was less sensitive to the effect of antiparasitic substances; the inhibitory concentrations of almost all the drugs assayed were higher than those for other tests. Conversely, the BRT MRL test was most affected, with high levels of interference at lower antiparasitic drug concentrations. Closantel and diazinon interfered with all microbial tests at lower concentrations than did other drugs (IC5 = 1 to 26 and 12 to 20 mg/kg, respectively), and higher concentrations of levamisole and diclazuril (IC5 = 30 to 240 and 50 to 117 mg/kg, respectively) were required to produce 5% positive results. These findings indicate that microbial inhibitor tests can be affected by elevated concentrations of antiparasitic drugs in goat's milk.


2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Olufemi Olatoye ◽  
Adesola Amosun ◽  
Uzo Ogbu ◽  
Yemi Okunlade

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.


2015 ◽  
Vol 143 (1-2) ◽  
pp. 87-92 ◽  
Author(s):  
Anka Popovic-Vranjes ◽  
Milka Popovic ◽  
Marija Jevtic

Contrary to the safe practices of milk pasteurization or sterilization, which effectively reduce foodborne outbreaks incidence associated with raw milk and dairy products use, outbreaks caused by such products continue to occur. Despite this fact, a worldwide movement advocating for the rights of raw milk and cheese selling and consumption, due to their specific nutritive characteristics, has strengthened significantly in recent years. Traditional agricultural manufacturers from Serbia still sell products related to thermally unprocessed milk, such as cottage cheese and raw cream. In AP Vojvodina during the period of 1981-2010 a total of 179 foodborne outbreaks were reported, where the incriminated cause of the outbreak were milk or diary. In 126 (70.39%) outbreaks, totaling 2276 sick individuals and one casualty, it was confirmed that the incriminated food was from the group of dairy products. In 48 instances (26.82%), bacteriological tests confirmed that milk and dairy products were excluded as the outbreak causes, while in another 5 (2.79%) outbreaks, microbiological analysis of food failed to confirm any relation to the actual epidemiological instances. In some cases, bacteriological testing of incriminated foods was not possible. In the cases of outbreaks associated with the consumption of milk and dairy products, traditional raw milk products were cited as being used. Consumption of unpasteurized milk and cheese represents public health threat. National and international rules ensuring use of safe products for human consumption have to set rules of trade of thermally processed milk and products on the market.


Author(s):  
Diego Villa Valdivieso ◽  
Mabel Parada Rivera ◽  
Marlene García Veloz

The main objective of this work was to design the industrial process for the elaboration of quinoa extruded (Chenopodium quinoa Willd) of vanilla, chocolate and passion fruit flavors. The first step was the physical, bromatological and microbiological characterization of the raw material according to the ‘NTE INEN 1673 (2013): Quinoa Requirements’. Next, both the laboratory and industrial processes were performed, in which the unitary operations suitable for precise design were determined, including extrusion, evaporation, mixing and drying. Simultaneously, data of the necessary processes were taken (humidity, temperature and time) which facilitated all engineering calculations essential to generate a daily production using 17 kg of natural quinoa extrude to obtain 22,702 kg of vanilla, 23,491 kg of chocolate or 24,137 kg of passion fruit values that were determined by mass balances. With these processed samples, a sensory evaluation was conducted using a preference test in which the vanilla flavor obtained a 63.03% acceptability, followed by passion fruit with 20.72%, and finally chocolate with 16.22%. Once it was completed, the design was validated through the ‘NTE INEN 2570 (2011): grain, cereal and seed snacks. Requirements’, recording values within the limits recommended by the norm. Thus, the product is suitable for human consumption. Keywords: Humidity, Extrusion, Mass balance, food safety, Statgraphycs (software). Resumen El presente trabajo tuvo por principal objetivo diseñar el proceso industrial para la elaboración de extruido de quinua (Chenopodium quinoa Willd) sabor a vainilla, chocolate y maracuyá, donde para cumplirlo se inició con la caracterización física, bromatológica y microbiológica de la materia prima acorde a la ‘NTE INEN 1673 (2013): Quinua. Requisitos.’, seguido a esto se desarrolló el proceso tanto a nivel de laboratorio como industrial en donde se determinaron las operaciones unitarias idóneas para un diseño preciso entre las que constan la extrusión, la evaporación, el mezclado y el secado, a la vez se tomaron los datos necesarios de las variables del proceso (humedad, temperatura y tiempo) que ayudarían a realizar todos los cálculos de ingeniería indispensables para generar una producción diaria que utiliza 17 kg de extruido de quinua natural para obtener 22,702 kg de vainilla, 23,491 de chocolate o 24,137 kg de maracuyá, valores que fueron determinados mediante balances de masa. Con las muestras elaboradas se procedió a realizar una ficha de evaluación sensorial utilizando una prueba de preferencia en la que el sabor de vainilla tuvo un 63,03% de aceptabilidad, seguido del de maracuyá con un 20,72% y por último el de chocolate con un 16,22%. Una vez se culminó el diseño se realizó su validación a través de la ‘NTE INEN 2570 (2011): Bocaditos de granos, cereales y semillas. Requisitos.’, registrando valores dentro de los límites recomendados por dicha norma, por lo tanto el producto es apto para el consumo humano. Palabras Clave: Humedad, Extrusión, Balance de masa, Seguridad alimentaria Statgraphycs (software).


2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Massimo Renato Micheli ◽  
Alfredo Rossi ◽  
Giovanni Rossi ◽  
Alfonso Rosamilia ◽  
Emanuele Guidi

Primary production has always been considered the weak link in the entire food production chain (from farm to fork) and, due also to the grave health and food emergencies that have taken place over the years (BSE, dioxin, avian flu etc.), greater attention has been focused on the production stage, together with the need to regain the consumers’ faith. To preserve and support small farms in a local setting and, consistent with the aims of flexibility and respecting the main requisites contained in the EC Regulations (No. 852/2004; No. 853/2004) (European Commission, 2004; 2004a), production is allowed for tastingadministration on the premises and the processing and sales of agricultural products produced exclusively on the farm, such as: fresh meat from poultry and rabbits and small farmed wild animals; processed meats obtained from animals raised on the farm and from hunting; fishing and aquaculture products; raw milk for direct human consumption and dairy products; eggs, honey, fruit and vegetables, woodland products; jams and preserved fruit, flours, vegetable preserves, wild above ground and underground mushrooms; dried fruits, fruit juices, cereals, syrups; oil, wine, bread and baked products. This possibility is reserved for individual farmers or co-operatives, registered in the company register according to Article 8 of the Law 29th December 1993 No. 580 (Italian Republic, 1993); who may sell directly inside and outside farm, products coming mainly from the respective farms, observing the current regulations regarding health and hygiene. All this should provide an instrument for rural and competitive development for the entire European agricultural production chain strongly influenced by the marketing conditions imposed by the mass retailing groups on their own suppliers. Not least is the possibility of creating work and occupation and adequately counteracting the phenomenon of the depopulation of the countryside, encouraging the return to agricultural activities on the part of young people; and, consequently, a form of safeguarding the environment by reducing the costs linked to hydro-geological instability and soil maintenance. This trend, together with the national directions, may represent a support even for small local farms which, taking advantage of simplified procedures consistent with the objectives of flexibility of the community Regulations (EC) (No. 852/2004; No. 853/2004) (European Commission, 2004; 2004a), may take part in the promotion of agricultural markets managed directly by the farmers as sales points for local products (farmers’ markets), so as to guarantee a fairer price and consolidate the territorial link between production and consumption (short distribution chain or short circuit). Without, of course, renouncing the necessary prerequisites for placing any food on the market: health-hygiene; traceability; health and well-being of the animals; safeguarding of the environment and the plants.


2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Sema Regasa ◽  
Shimelis Mengistu ◽  
Ashebr Abraha

A cross-sectional study was conducted to estimate the prevalence of Staphylococcus aureus in raw milk and swab, to assess the antimicrobial susceptibility profile, milk handling practice, and its associated risk factors in selected dairy farms of Mukaturi and Sululta Town, Oromia Region, Ethiopia. A total of 247 samples collected from dairy farms were examined using standard microbiological techniques. The antimicrobial susceptibility profiles of the isolates were also investigated. The possible risk factors for Staphylococcus aureus contaminations in milk were evaluated through a structured questionnaire. Overall, 16.6% (n= 41) of the samples were positive for S. aureus. The prevalence of S. aureus was 15.3% from udder milk and 25%, 20%, and 10% from milkers’ hand, milking bucket, and drying towel swab, respectively. The prevalence of Staphylococcus aureus in milk showed statistically significant variation with respect to age (p≤ 0.001), parity (P≤ 0.001), drainage condition of milking area (P=0.035), study sites (P=0.035), and management system (P=0.035). Majority of the isolates were found resistant to penicillin G (97.6%) and amoxicillin (43.9%). According to this study, 12/28(42.9%) Staphylococcus aureus positive raw milk samples had 104-105cfu/ml S. aureus count, which is above the recommended level for human consumption. 47.1% of milking persons store milk at room temperature temporarily (between 6 and 12 hrs) till transport to collection center with no means of cooling aid. From consumers 25.6% had no health risk associated with raw milk consumption or aware of milk borne disease associated with drinking raw milk. Thus, 60.5% of milk users had habit of raw milk consumption. The study revealed a prevalence of S. aureus, poor milk handling practices, raw milk consumption behavior in study area. Proper handling and hygiene decrease milk contamination by S. aureus and make it safe for human consumption.


2020 ◽  
pp. 1-12
Author(s):  
M. Taylor Rhodes ◽  
Fred Kuchler

Abstract Objective: The number of states in the USA that allows sales of raw milk for human consumption has been trending upwards and reached thirty-eight in 2016. These legislative changes could encourage raw milk consumption. The current study examined the determinants of weekly raw milk use by at-home meal preparers in the USA. Design: Using the 2014–2016 American Time Use Survey – Eating and Health Module, multivariate logit regressions and average marginal associations were estimated to examine how at-home meal preparer characteristics, time use and shopping choices, underlying health and the presence of at-risk individuals in households and raw milk legalisation status are associated with the probability an at-home meal preparer consumed or served raw milk during an average week. Setting: USA. Participants: At-home meal preparers aged 18 years and above. Results: Estimated average marginal associations suggested younger at-home meal preparers, male at-home meal preparers, larger sized households and households located in non-metropolitan areas were more likely to use raw milk during an average week. Married households and households with a person aged 62 years or above were less likely to use raw milk. Variables indicating health characteristics of at-home meal preparers or the presence of an at-risk individual in the household were not statistically significant. Conclusions: There are many government-sponsored information resources about the risks of raw milk currently available. Additional education may be needed to prevent illnesses from raw milk.


2014 ◽  
Vol 67 (2) ◽  
pp. 203-207 ◽  
Author(s):  
Denise Fontoura Morosini ◽  
Carlos Adolpho Magalhães Baltar ◽  
Antonio Carlos Duarte-Coelho

The water from several artesian wells in the metropolitan area of Recife presents high iron content, preventing its use in some industrial processes. The possibility of removing the iron by the use of precipitate flotation using sodium dodecyl sulphate (SDS) as collector was studied. The tests were carried out in a glass column 65 cm high, fed by a constant airflow. At pH 8, where the isoelectric point of colloidal iron hydroxide [Fe(OH)3] was observed, the size of the precipitate increases with conditioning time and facilitates the removal of iron ions by flotation. The results showed that an increase in conditioning time, from 5 to 20 minutes, resulted in a reduction of the residual concentration of iron from 13.2 to 0.2 ppm. The decrease in precipitate specific surface area rendered a decrease in the collector consumption possible. The iron ion removal process by flotation using SDS as collector was shown to be quite efficient. A removal of 99% of Fe3+ contained in the original solution was obtained.


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