Human toxoplasmosis is caused by the intracellular protozoan parasite Toxoplasma gondii. Although T. gondii infection is generally asymptomatic for most of the immunocompetent adults, severe complications may occur pa...Human toxoplasmosis is caused by the intracellular protozoan parasite Toxoplasma gondii. Although T. gondii infection is generally asymptomatic for most of the immunocompetent adults, severe complications may occur particularly in pregnant women and immunocompromised individual. Host cell immunity plays a critical role in parasite differentiation and persistence in the host. Therefore, genetic polymorphism in the host immune genes, for instance interferon-γ gene could be linked with possibility of T. gondii infection. The objective of the study was to verify the link between the single nucleotide polymorphisms (SNPs) in the IFN-γ gene of pregnant women and T. gondii infection through correlating with anthropometric and sociodemographic parameters. In this study, ninety-two (N = 92) pregnant women (16 - 40 years) and healthy controls (N = 95) with similar age ranges were included. Among them, 25% (n = 23) pregnant women were seropositive for T. gondii IgG antibodies by Rapid Test Assay. Allelic and genotypic frequencies of IFN-γ +874T/A (rs2430561) SNPs were evaluated by using ARMS-PCR. The distribution of the A and T alleles in the specific position of the IFN-γ gene in the T. gondii-infected pregnant women and the control groups did not differ significantly, according to the data. However, we found a higher frequency (13.04%) of A/A genotype in T. gondii infected pregnant women as compared to non-infected individuals (8.70%), demonstrating that T. gondii infection susceptibility may be increased by homozygosity for the A allele. Further studies are to be needed to find out the link between host gene polymorphism and T. gondii infection in Bangladesh.展开更多
Background: Toxoplasma gondii (T. gondii) is an intracellular parasite mainly found in the central nervous system CNS, however, it can persist in multiple tissues in the body. Moreover, T. gondii is the commonest prot...Background: Toxoplasma gondii (T. gondii) is an intracellular parasite mainly found in the central nervous system CNS, however, it can persist in multiple tissues in the body. Moreover, T. gondii is the commonest protozoans causing infections among individuals with acquired immunodeficiency syndrome (AIDS). Thus, the aim of this study was to investigate the frequency of T. gondii infection among AIDS patients in Makkah at Saudi Arabia. Methods: Fifty patients with AIDS proved to be positive by ULTRA HIV Ag-Ab Enzyme Immunoassay, and thirty healthy volunteers negative for AIDS by ULTRA HIV Ag-Ab Enzyme Immunoassay were subjected to determination of anti T. gondii immunoglobulin M (IgM) antibody seropositivity and anti T. gondii immunoglobulin G (IgG) antibody seropositivity using commercially available enzyme-linked immunosorbent assay kits. Results: The results showed that the seropositivity rate of anti T. gondii IgM antibodies among AIDS patients (18%) was significantly higher than in the healthy volunteers group (3.33%). Regarding the serum level of anti T. gondii IgG antibodies among AIDS patients, it was 30% significantly higher compared with those of the seropositive healthy volunteers (6.67%). Conclusions: These statistically significant results support the association between T. gondii infection and AIDS and suggest the usefulness of providing data for an educational program that will be designed to prevent T. gondii infection among AIDS patients.展开更多
I labelled T. gondii parasites were injected via tail vein into 14 day pregnant mouse( Kunming strain). Radioactive tracings of fetal train and pathologic changes were studiet. The results revealed that infection rat...I labelled T. gondii parasites were injected via tail vein into 14 day pregnant mouse( Kunming strain). Radioactive tracings of fetal train and pathologic changes were studiet. The results revealed that infection rates in the pregnant mice and in their fetal heads were 30.60% and 71.2% respectively. The ratio of the radioactivity between the fetal heads and the fetal trunks was 1.32-5.95 , being directly proportional to the durations of infection. Autoradiographs of light and electron microscopy indicated that the parasites appeared in the neurogliocytes of the fetal mice as early as 4 8 h post infection, and might be seen in the nucleus 48h after infection with degeneration and rupture of the cells. Numbers of the cranial nerve cells was distinctively reduced at 72h post infection. This study thus provided the experimental pathology evidence for the development of fetal neural malformation and cerebral lesions from T. gondil infected dam mouse.展开更多
Toxoplasmosis is a cosmopolitan antrhropozoonosis widespread in mammals and birds. Normally asymptomatic in the subject health, it can have serious consequences for the fetus in the first trimester of pregnancy in the...Toxoplasmosis is a cosmopolitan antrhropozoonosis widespread in mammals and birds. Normally asymptomatic in the subject health, it can have serious consequences for the fetus in the first trimester of pregnancy in the pregnant woman. It is in this context that we propose to assess the immune response to T. gondii in pregnant women in Bangui. This was a retrospective analytical study that consulted the records of pregnant women received in prenatal consultations at the Bangui Community Hospital Maternity ward from January 2019 to December 2019. Socio-demographic and laboratory data (IgM, IgG response to T. gondii) and results of HIV serology were collected from January to June 2021. Chi<sup>2</sup> test was used. A total of 307 pregnant women were analyzed. The average age of the women included was 28 (±6) years. The average parity of the entire sample was 2.18 (±1.93). Toxoplasmosis infectious was 14.65%. Women with a positive IgM response accounted for 17.58% and those with an IgG-positive response for 42.99%. Patients with a positive HIV were 5.86%. Patients aged 20 - 29 had a serological profile suggesting a probable ongoing infection (p = 0.010). The paucipares were more represented with no statistically significant difference (p = 0.23). Pregnant women were not significantly exposed to toxoplasmosis infectious (p = 0.96). Immunized and non-immunized subjects were similarly exposed [OR = 0.97;CI 95% 0.4 = 6 - 2.05]. Toxoplasmosis remains particularly serious during pregnancy. Seroprevalence was significantly higher in the 20 - 24 year age group. Women were similarly exposed depending on whether they were immunized or not. This requires the establishment of a specific prevention program against this disease.展开更多
Toxoplasma gondii (T. gondii) is a parasite responsible of toxoplasmosis, a disease often asymptomatic but with serious consequences in pregnant women and immunocompromised subjects. Objective: This study aimed to inv...Toxoplasma gondii (T. gondii) is a parasite responsible of toxoplasmosis, a disease often asymptomatic but with serious consequences in pregnant women and immunocompromised subjects. Objective: This study aimed to investigate the impact of T. gondii infection on CD4+ T lymphocytes count in HIV-infected pregnant women. Methods: This was a cross-sectional study of pregnant women co-infected by HIV and T. gondii. The study was conducted from January to July 2016 at the Prevention of Mother-to-Child Transmission of HIV (PMTCT) sites in the Health District of Lacs in Togo. Diagnosis of HIV was performed by immuno-chromatographic methods with Determine TM HIV-1/2 and immuno-filtration with Tri-Dot HIV-1 and 2 kits. Presence of anti-toxoplasmic IgG and IgM antibodies was established via enzyme immunoassay using ELISA-BIOREX®kit. Flow cytometry was used to count CD4+ T lymphocytes. Results: Our study found that of the 4599 pregnant women, 111 (2.41%) were HIV-positive. Among them, 109 (98.20%) were infected by HIV-1 and 2 (1.98%) by HIV-2. Antibodies against T. gondii were detected in 5.36% (IgM), 25% (IgG) and 3.57% (both IgM and IgG) of HIV 56 infected women. There was no significant difference between CD4 cell count in HIV (+)/T. gondii IgM (-)/IgG (-) infected pregnant women (378.8 ± 222.8 cell//μl) compared to HIV (+)/T. gondii/IgM (+) (457.3 ± 183.3 cell//μl), HIV (+)/T. gondii IgG (+) (419.4 ± 287.3 cell//μl) and HIV (+)/T. gondii IgM/IgG (+) (480.5 ± 252.4 cell/μl). Conclusion: This study showed that intracellular parasite T. gondii did not alter CD4+ T lymphocytes count in HIV/T. gondii co-infected pregnant women.展开更多
文摘Human toxoplasmosis is caused by the intracellular protozoan parasite Toxoplasma gondii. Although T. gondii infection is generally asymptomatic for most of the immunocompetent adults, severe complications may occur particularly in pregnant women and immunocompromised individual. Host cell immunity plays a critical role in parasite differentiation and persistence in the host. Therefore, genetic polymorphism in the host immune genes, for instance interferon-γ gene could be linked with possibility of T. gondii infection. The objective of the study was to verify the link between the single nucleotide polymorphisms (SNPs) in the IFN-γ gene of pregnant women and T. gondii infection through correlating with anthropometric and sociodemographic parameters. In this study, ninety-two (N = 92) pregnant women (16 - 40 years) and healthy controls (N = 95) with similar age ranges were included. Among them, 25% (n = 23) pregnant women were seropositive for T. gondii IgG antibodies by Rapid Test Assay. Allelic and genotypic frequencies of IFN-γ +874T/A (rs2430561) SNPs were evaluated by using ARMS-PCR. The distribution of the A and T alleles in the specific position of the IFN-γ gene in the T. gondii-infected pregnant women and the control groups did not differ significantly, according to the data. However, we found a higher frequency (13.04%) of A/A genotype in T. gondii infected pregnant women as compared to non-infected individuals (8.70%), demonstrating that T. gondii infection susceptibility may be increased by homozygosity for the A allele. Further studies are to be needed to find out the link between host gene polymorphism and T. gondii infection in Bangladesh.
文摘Background: Toxoplasma gondii (T. gondii) is an intracellular parasite mainly found in the central nervous system CNS, however, it can persist in multiple tissues in the body. Moreover, T. gondii is the commonest protozoans causing infections among individuals with acquired immunodeficiency syndrome (AIDS). Thus, the aim of this study was to investigate the frequency of T. gondii infection among AIDS patients in Makkah at Saudi Arabia. Methods: Fifty patients with AIDS proved to be positive by ULTRA HIV Ag-Ab Enzyme Immunoassay, and thirty healthy volunteers negative for AIDS by ULTRA HIV Ag-Ab Enzyme Immunoassay were subjected to determination of anti T. gondii immunoglobulin M (IgM) antibody seropositivity and anti T. gondii immunoglobulin G (IgG) antibody seropositivity using commercially available enzyme-linked immunosorbent assay kits. Results: The results showed that the seropositivity rate of anti T. gondii IgM antibodies among AIDS patients (18%) was significantly higher than in the healthy volunteers group (3.33%). Regarding the serum level of anti T. gondii IgG antibodies among AIDS patients, it was 30% significantly higher compared with those of the seropositive healthy volunteers (6.67%). Conclusions: These statistically significant results support the association between T. gondii infection and AIDS and suggest the usefulness of providing data for an educational program that will be designed to prevent T. gondii infection among AIDS patients.
文摘I labelled T. gondii parasites were injected via tail vein into 14 day pregnant mouse( Kunming strain). Radioactive tracings of fetal train and pathologic changes were studiet. The results revealed that infection rates in the pregnant mice and in their fetal heads were 30.60% and 71.2% respectively. The ratio of the radioactivity between the fetal heads and the fetal trunks was 1.32-5.95 , being directly proportional to the durations of infection. Autoradiographs of light and electron microscopy indicated that the parasites appeared in the neurogliocytes of the fetal mice as early as 4 8 h post infection, and might be seen in the nucleus 48h after infection with degeneration and rupture of the cells. Numbers of the cranial nerve cells was distinctively reduced at 72h post infection. This study thus provided the experimental pathology evidence for the development of fetal neural malformation and cerebral lesions from T. gondil infected dam mouse.
文摘Toxoplasmosis is a cosmopolitan antrhropozoonosis widespread in mammals and birds. Normally asymptomatic in the subject health, it can have serious consequences for the fetus in the first trimester of pregnancy in the pregnant woman. It is in this context that we propose to assess the immune response to T. gondii in pregnant women in Bangui. This was a retrospective analytical study that consulted the records of pregnant women received in prenatal consultations at the Bangui Community Hospital Maternity ward from January 2019 to December 2019. Socio-demographic and laboratory data (IgM, IgG response to T. gondii) and results of HIV serology were collected from January to June 2021. Chi<sup>2</sup> test was used. A total of 307 pregnant women were analyzed. The average age of the women included was 28 (±6) years. The average parity of the entire sample was 2.18 (±1.93). Toxoplasmosis infectious was 14.65%. Women with a positive IgM response accounted for 17.58% and those with an IgG-positive response for 42.99%. Patients with a positive HIV were 5.86%. Patients aged 20 - 29 had a serological profile suggesting a probable ongoing infection (p = 0.010). The paucipares were more represented with no statistically significant difference (p = 0.23). Pregnant women were not significantly exposed to toxoplasmosis infectious (p = 0.96). Immunized and non-immunized subjects were similarly exposed [OR = 0.97;CI 95% 0.4 = 6 - 2.05]. Toxoplasmosis remains particularly serious during pregnancy. Seroprevalence was significantly higher in the 20 - 24 year age group. Women were similarly exposed depending on whether they were immunized or not. This requires the establishment of a specific prevention program against this disease.
文摘Toxoplasma gondii (T. gondii) is a parasite responsible of toxoplasmosis, a disease often asymptomatic but with serious consequences in pregnant women and immunocompromised subjects. Objective: This study aimed to investigate the impact of T. gondii infection on CD4+ T lymphocytes count in HIV-infected pregnant women. Methods: This was a cross-sectional study of pregnant women co-infected by HIV and T. gondii. The study was conducted from January to July 2016 at the Prevention of Mother-to-Child Transmission of HIV (PMTCT) sites in the Health District of Lacs in Togo. Diagnosis of HIV was performed by immuno-chromatographic methods with Determine TM HIV-1/2 and immuno-filtration with Tri-Dot HIV-1 and 2 kits. Presence of anti-toxoplasmic IgG and IgM antibodies was established via enzyme immunoassay using ELISA-BIOREX®kit. Flow cytometry was used to count CD4+ T lymphocytes. Results: Our study found that of the 4599 pregnant women, 111 (2.41%) were HIV-positive. Among them, 109 (98.20%) were infected by HIV-1 and 2 (1.98%) by HIV-2. Antibodies against T. gondii were detected in 5.36% (IgM), 25% (IgG) and 3.57% (both IgM and IgG) of HIV 56 infected women. There was no significant difference between CD4 cell count in HIV (+)/T. gondii IgM (-)/IgG (-) infected pregnant women (378.8 ± 222.8 cell//μl) compared to HIV (+)/T. gondii/IgM (+) (457.3 ± 183.3 cell//μl), HIV (+)/T. gondii IgG (+) (419.4 ± 287.3 cell//μl) and HIV (+)/T. gondii IgM/IgG (+) (480.5 ± 252.4 cell/μl). Conclusion: This study showed that intracellular parasite T. gondii did not alter CD4+ T lymphocytes count in HIV/T. gondii co-infected pregnant women.
