Mycobacterium tuberculosis complex in atherosclerosis.

In recent years, the results of some studies have revealed the possible potential role of several infectious agents in the inflammatory mechanism of atherosclerosis. The detection of specific antibodies against microorganisms such as and as well as Chlamydia pneumoniae and cytomegalovirus as well as antibodies directed to heat shock proteins in the sera of atherosclerotic patients and the presence of genomic material in atheromatous plaques all provide evidence supporting the presumptive role of infectious agents in atherosclerosis. There are some findings that can be accepted as clues for the possible involvement of Mycobacterium tuberculosis in atherosclerosis. These consist of the presence of high levels of mycobacterial heat shock protein 65 in atherosclerotic patients, and in animal studies, the detection of atherosclerotic changes in the vascular wall of animals vaccinated with recombinant heat shock protein 65, and Mycobacterium tuberculosis containing heat shock protein 65. The probable proatherogenic effect of the specific immune response to BCG-associated heat shock protein was also suggested. The mycobacterium cell wall contains a phospholipid, phosphatidylinositol, which was shown to have a procoagulant effect similar to that of a cytomegalovirus possessing phosphatidylserine, another phospholipid showing a procoagulant effect. These data suggest that Mycobacterium tuberculosis may also be involved in the pathogenesis of atherosclerosis.</p

Immunogenicity of a Haemophilus influenzae type b–tetanus conjugate vaccine when administered separately or in combined vaccines for primary immunization in two consecutive national schedules in Turkey

SummaryBackgroundIn Turkey, the Haemophilus influenzae type b–tetanus toxoid conjugate vaccine (Hib) was replaced by the combined diphtheria–tetanus–acellular pertussis and inactivated polio vaccine (DTaP–IPV/Hib) in 2008. This shift to the new schedule created different cohorts of vaccinated children as a consequence of the different schedules used. We evaluated the immunogenicity of the Hib vaccine in infants vaccinated with these different schedules.MethodsThree groups of children were evaluated: group 1 comprised 145 infants vaccinated with diphtheria, tetanus, and whole cell pertussis (DTwP), oral polio vaccine (OPV), and Hib vaccines simultaneously at separate sites; group 2 comprised 204 infants vaccinated with the DTaP–IPV/Hib combined vaccine; group 3 comprised 100 infants vaccinated with a mixed schedule of DTwP, OPV, and Hib for the first one or two doses, followed by DTaP–IPV/Hib vaccine to complete the series.ResultsAnti-polyribosylribitol phosphate (anti-PRP) titers ≥0.15μg/ml were similar in groups 1, 2, and 3. However, in group 1, who received all the vaccines at separate sites, ≥ l.0μg/ml long-lasting antibody titers and anti-PRP geometric mean titers were higher (p=0.001).ConclusionThis study showed that even one dose administered in combination with other vaccines in a primary series decreased the level of anti-PRP

Vibrio cholerae O139

Until 1992 Vibrio cholerae O139 had been an unknown vibrio strain. In some aspects Vibrio cholerae 0139 is similar to O1 vibrios and on the other hand it is similar to non-OI vibrios. Vibrio cholerae O139 is thought to be a mutation of other vibrio strains. Strain O139 can be found especially at surface waters in nature. So, it can cause epidemics. Today, Vibrio cholerae O139 is accepted to be the eighth pandemic agent. Studies about immunity against Vibrio cholerae O139 and vaccine are still going on

Infecção pelo vírus Epstein-Barr tem influência sobre o desenvolvimento do carcinoma de laringe? Detecção de EBV pelo Real-Time Polymerase Chain Reaction em tecidos tumorais de pacientes com carcinoma de laringe

O vírus Epstein-Barr (EBV) é um conhecido vírus carcinogênico. A associação entre EBV e alguns tumores sugere que também pode haver correlação entre carcinoma de laringe e EBV. OBJETIVO: O presente estudo pretende determinar o papel do EBV na etiologia do carcinoma de laringe. MÉTODO: Estudo prospectivo sobre EBV por reação em cadeia da polimerase em tempo real em tecidos tumorais de 25 pacientes com carcinoma de laringe e 17 pacientes com lesões benignas de laringe; análise da relação entre presença de DNA viral e tabagismo, etilismo, localização e diferenciação tumoral. RESULTADOS: Não houve diferenças significativas entre os grupos de controle e de estudo para positividade da PCR para EBV (p > 0,05). Não foi identificada relação estatisticamente significativa entre positividade para EBV e diferenciação tumoral, localização da neoplasia, tabagismo ou etilismo (p > 0,05). CONCLUSÃO: Nossos resultados sugerem que, a despeito de sua identificação em alguns carcinomas espinocelulares de laringe, a presença de EBV não teve qualquer influência na patogenia do carcinoma de laringe

Human Papillomavirus (HPV) and Pregnancy; Prevalence and Diagnostic Methods

OBJECTIVE: To investigate the prevalence of Human Papillomavirus (HPV) and type detection of Human Papillomavirus as the most important causative agent of cervical cancer by PCR in pregnant women applying to Obstetrics and Gynecology outpatient clinic in Gazi Hospital. MATERIAL AND METHOD: Two hundred asymptomatic pregnant women applying to Obstetrics and 102 asymptomatic women applying to Gynecology outpatient clinic were included. HPV DNA was extracted from cervical smear samples by using phenol chloroform isoamyl alcohol and amplified by MY09/11 primers. Specific primers were used for type 16/18 detection. RESULTS: Five (2.5%) of 200 pregnant women were HPV DNA (+), two (1%) of which were type 16,two (1%) of which were type 18 and one(0.5%) of which was type 11.Two(2%) of 102 women in contol group were positive, both of which were type 16. CONCLUSION: HPV prevalence in pregnant women is lower than indicated in the literature. The probable reason may be common monogamy in Turkey and the non-smoking, young patient profile with high social and economic level in our study group. However, asymptomatic but HPV positive patients were directed to clinicians for follow-up and treatment

The relationship between cervical human papillomavirus infection and apoptosis

Purpose: Cervical carcinoma is the second most common cancer among women worldwide. Viral infections, especially human papillomavirus (HPV) infections, are important factors in its etiology. Changes in apoptotic regulation are considered to have an important role in the carcinogenesis development. In this study, the relationship between apoptosis and HPV infection was investigated. Methods: HPV DNA and HPV DNA type 16 positivity were detected in 110 cervical smear samples with Real Time PCR and sequencing was performed for HPV DNA type 18. The presence of apoptosis was investigated using TUNEL and Annexin V staining methods and analyzed by fluorescence microscope and flow cytometry. Results: HPV DNA type 16 was detected in 9 samples (8.1%), HPV DNA type 18 positive in 6 samples (5.4%) and HPV types other than HPV type 16 and HPV type 18 in 9 samples (8.1%). A decrease apoptosis was found in HPV DNA positive samples compared with controls (P < 0.05). Conclusion: The decrease of apoptosis during HPV infection might cause cellular immortality and then malignant transformation