Browsing by Subject "CHLAMYDIA-TRACHOMATIS INFECTION"

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  • Palkola, Nina V.; Pakkanen, Sari H.; Heikinheimo, Oskari; Kantele, Jussi M.; Kantele, Anu (2018)
    Mucosal antibodies constitute the first line of adaptive immune defence against invaders in the female genital tract (FGT), yet the sequence of events leading to their production is surprisingly poorly characterized. We explored the induction of pathogen-specific antibody-secreting cells (ASC) as a response to an acute infection in the upper FGT. We recruited 12 patients undergoing surgery due to an upper FGT infection (7/12 blood culture positive, 5/ 12 negative) and six healthy controls. Pathogens were sampled during surgery and PBMC collected in the acute phase of the disease (days 7-10). We searched by ELISPOT circulating pathogen-specific ASC and explored their frequency, immunoglobulin isotype distribution, and expressions of homing receptors (alpha(4)beta(7), L-selectin, and CLA). All patients had circulating ASC specific to the infective bacteria; the geometric mean was 434 (95%CI 155-1234) ASC (IgA + IgG + IgM)/10(6) PBMC. IgA ASC predominated in 7/12, IgG ASC in 3/12, and IgM ASC in 2/12 cases. Of all the pathogen-specific ASC, 60% expressed alpha(4)beta(7), 67% L-selectin, and 9% CLA. This study is the first to show induction of pathogen-specific ASC in the peripheral blood in bacterial infection in the human FGT. Our findings reveal that such FGT-originating pathogen-specific ASC are predominated by IgA ASC and exhibit a homing receptor profile resembling that of ASC in acute urinary tract infection. The data thus suggest a characteristic profile shared by the urogenital tract.
  • Brunham, Robert C.; Paavonen, Jorma (2020)
    Gynecological and obstetrical infectious diseases are an important component of women's health. A system approach to gynecological and obstetrical infection helps unify and classify microbial etiology and pathogenesis within a clinical anatomical framework of lower and upper genital tract syndromes. The reproductive system of women includes the vulva, vagina, cervix, uterus, fallopian tubes and ovaries. During pregnancy, additional tissues include the chorioamnion and placenta together with the fetus and amniotic fluid. We review in two parts reproductive system infection syndromes in women using selected research results to illustrate the clinical utility of the system approach in terms of diagnosis, treatment and prevention. We conclude that a reproductive system perspective will lead to improvements in understanding, management and prevention of these diseases.
  • Brunham, Robert C.; Paavonen, Jorma (2020)
    Lower genital tract infection and bloodborne spread of infection are the two principal modes for infection of the upper genital tract or for infection of the fetus, neonate or infant. Treponema pallidum and human immunodeficiency virus (HIV) are the two most common bloodborne pathogens that infect the fetus, neonate or infant. Most infections of the upper genital tract, however, spread along epithelial surfaces from the vagina or cervix to the upper genital tract or chorioamnion, fetus, neonate or infant. These infections are caused by either pathogens associated with a dysbiotic vaginal microbiome or those that are sexually transmitted. The clinical syndromes that these pathogens produce in the lower genital tract were discussed in part one of this review. We now discuss the syndromes and pathogens that affect the upper genital tract of both non-pregnant and pregnant women as well as fetus, neonate and infant.
  • Castellsague, Xavier; Paavonen, Jorma; Jaisamrarn, Unnop; Wheeler, Cosette M.; Skinner, S. Rachel; Lehtinen, Matti; Naud, Paulo; Chow, Song-Nan; Del Rosario-Raymundo, Maria Rowena; Teixeira, Julio C.; Palmroth, Johanna; de Carvalho, Newton S.; Germar, Maria Julieta V.; Peters, Klaus; Garland, Suzanne M.; Szarewski, Anne; Poppe, Willy A. J.; Romanowski, Barbara; Schwarz, Tino F.; Tjalma, Wiebren A. A.; Bosch, F. Xavier; Bozonnat, Marie-Cecile; Struyf, Frank; Dubin, Gary; Rosillon, Dominique; Baril, Laurence; HPV PATRICIA Study Grp (2014)