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PubMed2006

[The incidence of Trichomonas vaginalis in vaginal specimens from gynecologic patients].

The aim of this preliminary study was to determine the incidence Trichomonas vaginalis in our area. The group under investigation consisted of gynecologic patients with various complaints who came to the Gynecology Polyclinic of the Cumhuriyet University Medical Hospital. Vaginal smears were taken from the posterior fornics of these patients. Three samples were taken from each person with sterile swaps. One of the samples was taken for cultivation, one for a direct preparation and the last for Giemsa staining. All of the slides and cultures were evaluated in the Medical Parasitology Research Laboratory. Sixty-one female patients were included in our investigation. Besides the primary complaints of 39 (63.9%) patients, there were also vaginal discharges and complaints of itching in the group under investigation. Trichomonas vaginalis was found in 2 patients (3.2%).

Adult↗
PubMed1991

The prevalence of Gardnerella vaginalis, Trichomonas vaginalis and Candida albicans in the cytology clinic at Ibadan, Nigeria.

In a study of 2224 adult women from the cytology clinic of the University College Hospital, Ibadan, Nigeria, the prevalence of 'specific vaginal infection' (i.e. Gardnerella vaginalis, Trichomonas vaginalis and Candida albicans) was 14.5%. For individual organisms, the rates were 9.76% for G. vaginalis, 2.52% for T. vaginalis and 2.20% for C. albicans. About half of the patients were asymptomatic while others were referred from other clinics with vaginal discharge, cervical erosion, post-coital bleeding, intermenstrual bleeding and various other symptoms and signs. The infections were almost uniformly distributed in all age groups studied. Increasing promiscuity either as a result of increased mobility of husbands (due to economic depression) or increased use of contraception by older women was thought to be responsible for the persistence of these infections in those aged 45 years and above. In addition, Gardnerella vaginalis, Trichomonas vaginalis and Candida albicans infections can also be easily diagnosed from cervical cytology, by identification either of the organism or of characteristic cytological cellular changes.

Adult↗
PubMed1990

Transvaginal-peritoneal migration of Trichomonas vaginalis as a cause of ascites. A report of two cases.

Genital tract colonization with Trichomonas vaginalis usually results in vaginitis without systemic manifestations. There are only four recorded cases of Trichomonas recovered from pelvic organs or peritoneal fluid. This report describes two additional women in whom motile flagellate organisms were recovered from abdominopelvic ascites. We hypothesize that an ascending trichomonal infection may have played an etiologic role in the development of their acute disease.

Animals↗
PubMed1988

Use of a crude extract or a purified antigen of Trichomonas vaginalis for the detection of secretory antibodies by ELISA.

A crude aqueous extract (T2) or a gel-filtration purified antigen of T. vaginalis was utilized to detect secretory antibodies in cervico-vaginal secretions by ELISA. The test was developed under optimum conditions using a rabbit anti-Trichomonas serum. Conditions established for monitoring antibodies to trichomonas in immunized rabbits were equally effective for human secretions. The crude extract was capable of assessing secretory antibodies in 45% of women with acute trichomoniasis and 43% of healthy women. The purified antigen showed a marked antigenic activity and compared to the crude antigen, testing 6 samples from infected women, detected a false positive and reduced the O.D. value of another sample by 1/4.

Animals↗
PubMed1986

Prevalence of Trichomonas vaginalis in some Filipino women.

Vaginal specimens obtained from 1,284 hospitality girls and 87 expectant mothers were examined for Trichomonas vaginalis by first examining material collected from vaginal swabs and after incubation in Feinberg and Whittington culture medium. Twenty-four percent of the specimens examined, shortly after the cotton-tip swab was placed into 1 ml culture medium, were positive by direct microscopic examination and 37% positive following 3 to 5 days incubation at 37 degrees C. Only 3 of the specimens from mothers were positive after the first examination and 4 positive after culture. These high prevalence rates are expected among hospitality girls and are the highest rates thus far reported from the Philippines. These results provide convincing evidence of the value of using cultural methods in determining prevalence rates for Trichomonas vaginalis infections in females.

Female↗
PubMed1983

Immune response to Trichomonas vaginalis. IV. Immunochemical and immunobiological analyses of T. vaginalis antigen.

The immune response of patients with trichomoniasis vaginitis to Trichomonas vaginalis was examined by using passive hemagglutination assay and skin reactions. Trichomonas-specific immune responses could hardly be detected in the patients by these assay methods. In order to develop a simple and reliable assay for demonstration of T. vaginalis-specific immune responses in the patients, proliferation responses of peripheral mononuclear cells from the patients were examined. Lymphocytes obtained from the patients were shown to incorporate 3H-methyl-thymidine when stimulated with T. vaginalis antigen in vitro. Furthermore, immunochemical analysis of T. vaginalis antigen has been done by Sephadex chromatography and sodium dodecyl sulfate gel electrophoresis. The data revealed that the murine and human IgM antibodies specific to T. vaginalis recognize various antigens with a wide range of molecular weights (between 13,000 and 100,000 daltons), while human and murine IgG antibodies recognize molecules with a much narrower range of molecular weights (50,000-100,000 daltons).

Antibodies↗
PubMed1982

Immune response to Trichomonas vaginalis. I. Genetic regulation of IgE antibody response to T. vaginalis in mice.

The antigenicity of Trichomonas vaginalis to elicit IgE antibody was examined in mice. The soluble antigen was prepared by sonication of in vitro cultured T. vaginalis lines. BALB/c mice were immunized by various doses of the antigen with alum followed by a booster injection on day 14 after primary injection of the protozoan antigen. The highest IgE antibody titer was found in mice immunized with 30 micrograms of the antigen. The IgE antibody response to Trichomonas antigen is regulated by at least two immune response genes: one localized in the I region (K to I-B subregions) of chromosome 17, the other in a not yet identified chromosome.

Animals↗
PubMed1993

Trichomonas tenax in Basrah, Iraq.

One hundred and forty-three swabs from diseased mouths and 271 from healthy controls were examined by direct wet smear method for Trichomonas tenax. Negative swabs were cultured on suitable media. The frequency of trichomonas tenax was 8.4% and 4.1% in diseased and controls respectively. Of 23 positive samples, 14 (3.3%) were positive on direct wet smear method and 9 (2.1%) were positive on culture method. There were 12 males and 11 females. Highest frequency of infection (6.7%) was found in 6-10 years age group and lowest (3.7%) in 11-20 years group. Only 1% university students were positive.

Adolescent↗
PubMed1993

[Trichomonas vaginalis in women attending gynecology clinics].

In this study Trichomonas vaginalis was investigated in vaginal swab specimens from 234 women attending to the Gynecology Outpatient Clinics with various reasons. Trichomonas vaginalis was detected by wet mount in 8 women (3.4%) and, by culture using modified Diamond's medium in 9 women (3.8%). Of 9 cases only 2 were suspected for trichomoniasis by gynecological examination.

Adolescent↗
PubMedDate not supplied

[Microbial associations in Trichomonas urethritis].

The results on isolation of associated microflora from 190 patients suffering from Trichomonas urethritis are given. Microorganisms belonged to the species: Mycoplasma hominis. Ureaplasma urealyticum. Streptococcus pyogenes. Escherichia coli. Klebsiella pneumoniae. Proteus mirabilis. Moraxella lacunata. Acinetobacter Calcoaceticus and Candida. Staphylococcus cultures which were isolated from 100% patients belonged to 8 species: Staphylococcus aureus, S. intermedius, S. haemolyticus, S. epidermidis, S. capitis, S. hominis, S. warneri, S. saprophyticus. Most of Staphylococcus cultures had pathogenic features. Structure of Trichomonas vaginalis and interaction between them and associated microflora were studied by electron microscopy.

Animals↗
PubMed1996

Study on ultrastructural cytochemistry and pathogenic mechanism of Trichomonas vaginalis.

OBJECTIVE: To study the relation among enzymic ultrastructural localizations, cell organelles and functions of Trichomonas vaginalis (T. vaginalis) as well as its pathogenic mechanism. MATERIAL AND METHODS: The specimens were Trichomonas vaginalis cultured purely for several generations. After prefixation, several electron microscopic cytochemical reactions for marker enzymes of lysosome, Golgi body, mitochondrion and microbody as well as Ur-Pb-Cu impregnation were undertaken. Then the specimens were post-fixed and embedded, and the unstained ultrathin sections were observed under a transmission electron microscope. RESULTS: The activities of acid phosphatase and cytidine monophosphatase appeared in the primary and secondary lysosomes of the parasite, and the reaction product of peroxidase was found in the secondary lysosomes. It was found that lysosomes could release hydrolytic enzymes out of the cell. The reaction products of thiamine pyrophosphatase and nicotinamide adenine dinucleotide phosphatase were located within the mature-surface and intermediate saccules of Golgi body respectively. The reactions for succinate dehydrogenase, cytochrome oxidase and catalase were negative. The hydrogenosomes, endoplasmic reticulum and Golgi bodies of the parasite were densely stained by Ur-Pb-Cu impregnation method. CONCLUSIONS: T.vaginalis has lysosomal system which can release hydrolases out of the parasite, causing damage to the vaginal and urethral epithelial cells. This may be an important pathogenic mechanism of vaginitis and urethritis caused by T.vaginalis. This protozoon has well-developed Golgi bodies and rich endoplasmic reticulum. It lacks mitochondrion and microbody, but has abundant hydrogenosomes which are energy producing organelles of anaerobic metabolism and resemble microbody in morphology and mitochondrion in some functions.

Animals↗
PubMed1993

Trichomonas vaginalis: strain differences in adhesion to plastic and virulence in vitro and in vivo.

Trichomonas vaginalis isolated from clinical cases were grown axenically in TYI-S-33 medium. Various strains of this flagellate showed different adhesion characteristics in medium containing bovine serum or Cohn fractions thereof. These were not inversely related to the time in axenic culture. The adsorption of serum components to the parasites was assessed in relationship to adhesion but in many cases was probably not adhesion-related. All strains tested for virulence in vitro were almost equally cytotoxic for HeLa tissue cultures. However, in infectivity trials, one of these strains exhibited the highest adhesion capability and proved to be the most virulent for mice, and another (cloned) strain with the poorest adhesion capability failed to cause infection. Other strains exhibited lessened virulence following their extended axenic cultivation. It therefore appears that the in vivo pathogenic potential of the parasites growing in axenic culture is inherently strain-dependent. The findings suggest that although adhesion in whole serum-containing medium is sufficient to differentiate between various Trichomonas isolates, it is insufficiently sensitive to correlate adhesion with virulence. It apparently is important to identify the adhesion-mediating factor(s) in serum or in its Cohn fractions IV-1 and IV-4 and to use it (them) to elucidate the possible correlation between the parasite's capacity to adhere and its pathogenicity.

Adsorption↗
PubMed1991

In vitro phagocytic interaction between Trichomonas vaginalis isolates and bacteria.

The phagocytic activity of 12 Trichomonas vaginalis isolates against both gram-positive bacteria (Staphylococcus aureus ATCC 25923, Lactobacillus spp.) and gram-negative bacteria (Enterobacter cloacae ATCC 13047, 5 strains of Escherichia coli, Pseudomonas aeruginosa ATCC 27853) was studied. Results showed that all the isolates were able to ingest Staphylococcus aureus to a variable degree, and almost all of them showed phagocytic activity against Pseudomonas aeruginosa. Furthermore, experiments with a restricted number of isolates of Trichomonas vaginalis showed that they phagocytized, often very effectively, human vaginal lactobacilli. Only in some cases was the addition of serum essential for bacteria ingestion. Phagocytic uptake of Escherichia coli and Enterobacter cloacae was not detectable under the experimental conditions used. It is concluded that phagocytosis may be involved in changes in vaginal biocenosis during the early stages of trichomoniasis.

Animals↗
PubMed1986

Adherence of Trichomonas vaginalis to cell culture monolayers.

The in vitro adherence to WISH cells of a pathogenic Trichomonas vaginalis strain was studied with a method utilizing thymidine-labeled protozoa. A marked dose-related adherence was observed. Glutaraldehyde fixed trichomonads were not adherent. The presence of fetal calf serum during the assay did not influence attachment. Concanavalin A inhibited adherence of protozoa. Complete or partial inhibition of adherence was achieved by preincubating WISH cells with Lactobacillus fermentum or Streptococcus agalactiae. Finally, pretreatment of cells with alpha-estradiol, beta-estradiol, progesterone and estrone influenced attachment of protozoa, whereas estriol was ineffective. These results suggest that adherence of Trichomonas vaginalis is dependent on different factors, whose manipulation may have clinical relevance in preventing recurrence of trichomonad vaginitis.

Adhesiveness↗
PubMed1975

Involvement of a surface concanavalin A-binding glycoprotein in the adhesion of Trichomonas vaginalis to substrates.

Treatment of Trichomonas vaginalis with EDTA removes their ability to adhere to glass surfaces and changes their affinity to Concanavalin A (ConA) by a different distribution of their surface structures. Filtrates of the EDTA-treated Trichomonas passed through affinity chromatography columns (ConA bound to Sepharose 4B) separate into 2 fractions, one fraction was bound to the ConA-Sepharose beads, the other was not. The Con A - bound fraction appears to be a glycoprotein which restores in a specific way the ability of the EDTA-treated protozoa to adhere to glass.

Cell Adhesion↗
PubMed2000

Trichomonas vaginalis: analysis of a heat-inducible member of the cytosolic heat-shock-protein 70 multigene family.

A 2253-nucleotide (nt) transcript for a Trichomonas vaginalis heat-shock protein 70, TVCHSP70, has been isolated that encodes for a protein of 659 amino acids with a predicted molecular weight of 71.3 kDa. TVCHSP70 has a short (10-nt) 5' untranslated region (UTR), and the 263-nt 3' UTR is the longest reported for a Trichomonas peptide. Amino-acid sequence analysis and phylogenetic comparison identifies TVCHSP70 as a member of the heat-inducible cytoplasmic HSP70 gene family. Southern-blot data indicate that T. vaginalis contains at least four members of the cytoplasmic HSP70 gene family. Members of the TVCHSP70 family are expressed as 2.3-kb transcripts at low levels during 37 degrees C culture, and their expression is significantly up-regulated at 43 degrees C. Slot-blot analysis of seven T. vaginalis clinical isolates demonstrated a 3- to 44-fold up-regulation of TVCHSP70 under conditions of heat shock (43 degrees C) or oxidative stress (500 microm H2O2) as compared with controls (37 degrees C).

Animals↗
PubMed1992

Vaginal PO2 in healthy women and in women infected with Trichomonas vaginalis: potential implications for metronidazole therapy.

We measured the PO2, pH, and temperature in the vaginal canals of nine patients with symptomatic Trichomonas vaginitis and those of 10 healthy women. The patients included eight women with primary infections caused by metronidazole-susceptible strains and one refractory case that resulted from infection with a metronidazole-resistant Trichomonas vaginalis. The median vaginal PO2, pH, and temperature in the patient group were 1 mm Hg, 6, and 37.3 degrees C respectively; these medians were 1 mm Hg, less than or equal to 4.5, and 37.2 degrees C in the healthy group. These data show that vaginal environment is anaerobic or microaerophilic (it has reduced oxygen tension). Because the activity of metronidazole is reduced under aerobiosis, the vaginal environment should enhance the biologic activity of the drug.

Adult↗
PubMed1988

The release of hydrolases from Trichomonas vaginalis and Tritrichomonas foetus.

Trichomonas vaginalis and Tritrichomonas foetus were found to release large amounts of beta-N-acetylglucosaminidase (EC 3.2.1.30), alpha-mannosidase (EC 3.2.1.24), beta-glucosidase (EC 3.2.1.21), acid phosphatase (EC 3.1.3.2) and proteinases during axenic growth in vitro. The enzymes were released continually throughout the growth phase, with the extracellular activity being of the same order as that within the cells. There was differential release of proteinases from Trichomonas vaginalis. The subcellular localization of the hydrolases was determined by differential and isopycnic centrifugation. The intracellular enzymes were shown to be mostly located within particle populations. Centrifugation on Percoll gradients allowed the separation of sub-populations of the particles in T. vaginalis; two distinct sub-populations were apparent with equilibrium densities in 20% (v/v) Percoll of 1.035 and 1.050 g cm-3 respectively. The higher density particles were rich in the hydrolases released most abundantly, suggesting a possible link between enzyme release and these organelles. Distinct subpopulations of hydrolase-containing particles were not detected in Tritrichomonas foetus. The results demonstrate that hydrolytic enzyme release represents a major activity during trichomonad growth.

Acetylglucosaminidase↗