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Rheumatoid arthritis (RA) is a chronic disease associated with many factors, such as urinary tract infection (UTI), and the complicated type of UTI bacteria is Proteus mirabilis. Accordingly, 67 RA patients with UTI and 45 healthy controls from Baghdad regions were included in this study. Proteus mirabilis isolates were obtained from the urine of patients with RA and identified in 11.9% by biochemical tests and 16sRNA gene sequencing. ABO blood types, serum TNF-α level, serum rheumatoid factor (RF), C-reactive protein, and anti-bacterial antibody level of RA patients were compared to healthy controls. The study indicated that there is a correlation between blood type O, serum TNF-α level, rheumatoid factor (RF), C-reactive protein, and anti-bacterial antibody level of RA patients. The significant result was the increased serum level of TNF-α of RA patients who were infected with urease-produced bacteria, this might be due to the enzyme structure's role in evoking the disease.

Background: The rising population of patients with diabetes type 1 has caused in a fast increase in the amount of patients who have diabetic complications. Objective: Isolation of bacteria from diabetic patients and detection of their antibodies in the serum of patients and rabbits. Materials and Methods: Sixty samples of blood and urine were collected from diabetic patients, a similar proportion of genders were included in 50 samples of blood from healthy as controls. Patients with diabetes diseases diagnosed by a physician collected from specialized center for endocrinology and diabetes and Kindy hospital, in Baghdad. Results: This study showed that Morganella morganii (n=9, 18%) was isolated from urine of patients. With M. morganii antigens (complete cells) as three bacteria antigens agglutinated in titer 1:64 and three in titer 1:128 of serum of patients (antibodies) whereas 1 and fife of M. morganii antigens agglutinated in serum of patients in titer 1:256 and 1:16 Consecutively. Determination of the concentration of cytokinetic proteins IL-17, using an ELISA device. The concentration of some inflammation-initiating cytokines was estimated in the serum of the studied samples, which included using IL-17 ELISA technology. The statistical results by t-test showed were significant differences between this interleukin between the patients and the control sample and under the probability level P<0.05 in the serum of the patients compared to the control sample. The results also showed a decrease in the cytokinetic concentration, as the concentration in the infected serum was 0.011 ± 0.019 (pg/mm), while its concentration in the control sample was 0.007 ± 0.033 (pg/mm) in the infected serum. Recognize the agglutination ability slide agglutination exam (anti Morganella morganii rabbit serum). Conclusion: The ability of killed antigen bacteria isolated from diabetic patients to agglutinate with their serum, and its ability to agglutinate with the serum of rabbits injected with this bacterium. The increased prevalence of agglutination and increased antibodies of patients and rabbit blood suggest this as part of the multifactorial basis for disease penetrance and susceptibility.

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Staphylococcus epidermidis is the most significant nosocomial pathogen related to people with vulnerable frameworks such as malignant growth patients, neonates, and foreign body embedded materials such as heart valves. A few virulence factors in S. epidermidis can cause host damage in comparison to Staphylococcus aureus. In spite of that, the key roles of S. epidermidis virulency rely on biofilm formation, bacterial biofilm is essential for the pathogenesis by encouraging microorganisms to consist shape networks of assurance rather than free planktonic cells, hence resistance to antibacterial agents, and medically uninsured problems by colonizing medical indwelling, making the disease long span, and difficult to treat. The National Institute of Health (NIH) reported 65-80% of bacterial illnesses are biofilm formed, thus making numerous passing wellbeing additional costs. Therefore, the biofilms establishing on the susceptible hosts' tissues demonstrate; preventing antibiotics efficient treatment, protecting against host defense mechanisms, and announce the bacteria virulence determinants manifesting.