In this study,four strains of Toxoplasma gondii with the same genetic type（Type I） originated from chicken,human,cat and swine were used to compare the immune responses in resistant chicken host to investigate the r...In this study,four strains of Toxoplasma gondii with the same genetic type（Type I） originated from chicken,human,cat and swine were used to compare the immune responses in resistant chicken host to investigate the relationships between the parasite origins and the pathogenicity in certain host.A total of 300,10-day-old chickens were allocated randomly into five groups which named JS（from chicken）,CAT（from cat）,CN（from swine）,RH（from human） and a negative control group（—Ve） with 60 birds in each group.Tachyzoites of four different T.gondii strains（JS,CAT,CN and RH） were inoculated intraperitoneally with the dose of 1×10~7 in the four designed groups,respectively.The negative control（-Ve） group was mockly inoculated with phosphate-buffered saline（PBS） alone.Blood and spleen samples were obtained on the day of inoculation（day 0） and at days 4,11,25,39 and 53 post-infection to screen the immunopathological changes.The results demonstrated some different immune characters of T.gondii infected chickens with that of mice or swine previous reported.These differences included up-regulation of major histocompatibility complex class Ⅱ（MHC Ⅱ） molecules in the early stage of infection,early peak expressions of interleukin（IL）-12（IL-12） and-10（IL-10） and long keep of IL-17.These might partially contribute to the resistance of chicken to T.gondii infection.Comparisons to chickens infected with strains from human,cat and swine,chickens infected with strain from chicken showed significant high levels of CD4~＋ and CD8~＋ T cells,interferon gamma（IFN-γ）,IL-12 and IL-10.It suggested that the strain from chicken had different ability to stimulate cellular immunity in chicken.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
基金supported by the Special Fund for Public Welfare Industry of Ministry of Agriculture of China(200903036-04)the Priority Academic Program Development of Jiangsu Higher Education Institutions,China(PAPD)
文摘In this study,four strains of Toxoplasma gondii with the same genetic type（Type I） originated from chicken,human,cat and swine were used to compare the immune responses in resistant chicken host to investigate the relationships between the parasite origins and the pathogenicity in certain host.A total of 300,10-day-old chickens were allocated randomly into five groups which named JS（from chicken）,CAT（from cat）,CN（from swine）,RH（from human） and a negative control group（—Ve） with 60 birds in each group.Tachyzoites of four different T.gondii strains（JS,CAT,CN and RH） were inoculated intraperitoneally with the dose of 1×10~7 in the four designed groups,respectively.The negative control（-Ve） group was mockly inoculated with phosphate-buffered saline（PBS） alone.Blood and spleen samples were obtained on the day of inoculation（day 0） and at days 4,11,25,39 and 53 post-infection to screen the immunopathological changes.The results demonstrated some different immune characters of T.gondii infected chickens with that of mice or swine previous reported.These differences included up-regulation of major histocompatibility complex class Ⅱ（MHC Ⅱ） molecules in the early stage of infection,early peak expressions of interleukin（IL）-12（IL-12） and-10（IL-10） and long keep of IL-17.These might partially contribute to the resistance of chicken to T.gondii infection.Comparisons to chickens infected with strains from human,cat and swine,chickens infected with strain from chicken showed significant high levels of CD4~＋ and CD8~＋ T cells,interferon gamma（IFN-γ）,IL-12 and IL-10.It suggested that the strain from chicken had different ability to stimulate cellular immunity in chicken.
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.
