Listeria monocytogenes is an important foodborne pathogen responsible for human listeriosis, which is a disease with high hospitalisation and mortality rates. The bacteria are usually susceptible to most antibacterial substances, but resistance to some of them has been recently observed. The present study introduces the evidence on the emergence of antibiotic resistance among L. monocytogenes strains isolated from food and food-production environments in Poland.

Meat products are essential sources of high quality animal protein, essential amino acids, and trace elements such as copper, zinc, and iron, and vitamins such as vitamin B group. However, meat products can be exposed to contamination with several xenobiotics including heavy metals. Several species of the heavy metal group have no physiological functions and their intake via contaminated food and water is associated with several adverse health effects that might reach to even death. In this review, we will throw the light on the occurrence of heavy metals and the sources of contamination of the meat products with these chemicals. Moreover, the potential adverse health effects associated with these chemicals will be reviewed.

Pathogens can acquire resistance to antimicrobials used in veterinary and medical fields. Such pathogens can be found in several dietary and environmental sources. As Gram-negative infections in humans are most frequently caused by Escherichia coli (E. coli), antibiotic resistance in this organism is particularly concerning. This investigation was carried out to ascertain the antibiotic sensitivity profile of E. coli isolated from various food products randomly gathered from Egypt. To extract E. coli and examine its pattern of antibiotic susceptibility, 100 samples of raw milk, karish cheese, ground beef, and beef were bacteriologically processed. In the current study, E. coli strains were detected at a high frequency of 40% in raw milk, 28% in Karish cheese, 16% in ground beef, and 8% in beef. E. coli was isolated from 23% of milk, meat, and product samples. The 16S rRNA gene was detected using polymerase chain reaction (PCR) to confirm E. coli strains. The isolates of E. coli with the greatest percentages of multidrug-resistant (MDR) were tetracycline (26%), ampicillin (21.7%), streptomycin and sulfamethoxazole-trimethoprim (17.3%), cefotaxime, kanamycin and ceftazidime (13 %). The total occurrence of MDR E. coli was 34.7%. Pathogen cycling in food is common and may endanger the consumer's health. To avoid this entirely, good hygiene practices for dairy farms and abattoirs are essential for preventing contamination of milk, meat, and product samples.

Objective: The study aimed to determine the effect of giving concentrate protein from closed-house (CP-CH) broiler farm waste in rations on the meat quality (physical-chemical) and blood profile of landrace crossbreed pigs. Materials and Methods: The study used a completely randomized design (CRD) with 3 treat¬ments and 4 replications with 12 finisher-phase landrace pigs with an average body weight of 63.42 ± 2.39 kg. The treatments were: A (control): use of 0% CP-CH + 24% CP-152 concentrate; B: 12% CP-CH + 12% CP-152 concentrate; and C: 24% CP-CH + 0% CP-152 concentrate. The research parameters were meat quality (physical-chemical meat) and blood lipid profile [total cholesterol, high-density lipoprotein (HDL), low-density lipoprotein (LDL), and triglycerides (TGs)]. Results: The results showed that treatment group B obtained physical meat quality (pH, drip loss, cooking loss, and water holding capacity) and meat chemical quality (moisture, protein, fat, and ash content) that were almost the same as the control (p > 0.05). By administering 24% CP-CH + 0% CP-152 (C) concentrate, there was a significant decrease in the physical and chemical quality of crossbreed landrace pigs (p < 0.05). Administration of CP-CH at 12%–24% did not affect total cholesterol, HDL, LDL, or blood TGs in landrace-crossbreed pigs. Conclusion: Giving 12% CP-CH (B) obtained meat quality (physical and chemical) almost the same as the control group. Treatment group C significantly reduced the physical and chemical quality of the meat. Administration of CP-CH at 12%–24% did not affect the blood profile of landrace crosses. [J Adv Vet Anim Res 2023; 10(4.000): 579-586]