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Pawełczyk A, Bednarska M, Caraballo Cortés K, Glamkowska-Sady M, Kowalska J, Uszyńska-Kałuża B, Radkowski M, Welc-Falęciak R. Seronegative Infection with Toxoplasma gondii in Asymptomatic Human Immunodeficiency Virus Type 1 (HIV-1)-Infected Patients and in Blood Donors. J Clin Med 2022; 11:jcm11030638. [PMID: 35160090 PMCID: PMC8836849 DOI: 10.3390/jcm11030638] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 02/04/2023] Open
Abstract
Background: Toxoplasmosis is a common opportunistic infection in AIDS patients. The routine diagnostics is based on serologic testing and IgG avidity index, but it may have limited utility in immunodeficient patients; thus, it is recommendable to detect T. gondii DNA in subjects with advanced HIV disease. The results of the studies published so far focused on patients with clinical symptoms of toxoplasmosis. Our study encompassed a group of HIV-infected subjects on cART therapy, without immunological disturbances and clinical symptoms of T. gondii infection. Methods: The study was retrospective, and samples were collected between 2013 and 2016. We evaluate the prevalence of serological (IgM, IgG, and avidity IgG) and molecular (DNA) T. gondii infection markers in asymptomatic HIV-infected patients and the control group using serologic (ELISA) and quantitative (real-time PCR) molecular testing. Results: Of 152 HIV-infected in routine follow-up tested for T. gondii IgM and IgG, 6 (3.9%) and 50 (32.9%) were positive, respectively. Of 168 serum samples from blood donors, 1 (0.6%) and 49 (29.2%) were IgM+ and IgG+ positive, respectively. IgM seroprevalence in HIV-infected patients was significantly higher than in blood donors. T. gondii DNA (genotype II) was identified in 47 (30.9%) HIV-infected patients, with 13 (8.6%) IgM−IgG− samples. In blood donors, T. gondii DNA was present in 15 (8.9%) IgM−IgG−. Conclusions: In both groups, T. gondii DNA was detectable in seronegative subjects, implying the need to supplement the routine serological testing via the molecular method. It can help the accurate monitoring of the reactivation of infection in asymptomatic HIV-infected persons, and the quick introduction of specific therapy, in blood donors, would be of high importance for safe blood donations.
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Affiliation(s)
- Agnieszka Pawełczyk
- Department of Immunopathology of Infectious and Parasitic Diseases, Medical University of Warsaw, ul. Pawińskiego 3C, 02-106 Warsaw, Poland; (K.C.C.); (M.G.-S.); (M.R.)
- Correspondence:
| | - Małgorzata Bednarska
- Department of Parasitology, Faculty of Biology, University of Warsaw, ul. Miecznikowa 1, 02-096 Warsaw, Poland; (M.B.); (R.W.-F.)
| | - Kamila Caraballo Cortés
- Department of Immunopathology of Infectious and Parasitic Diseases, Medical University of Warsaw, ul. Pawińskiego 3C, 02-106 Warsaw, Poland; (K.C.C.); (M.G.-S.); (M.R.)
| | - Marianna Glamkowska-Sady
- Department of Immunopathology of Infectious and Parasitic Diseases, Medical University of Warsaw, ul. Pawińskiego 3C, 02-106 Warsaw, Poland; (K.C.C.); (M.G.-S.); (M.R.)
| | - Justyna Kowalska
- Department of Adults’ Infectious Diseases, Medical University of Warsaw, ul. Wolska 37, 01-201 Warsaw, Poland;
| | - Beata Uszyńska-Kałuża
- Blood Center, Ministry of Internal Affairs and Administration, ul. Wołoska 137, 02-507 Warsaw, Poland;
| | - Marek Radkowski
- Department of Immunopathology of Infectious and Parasitic Diseases, Medical University of Warsaw, ul. Pawińskiego 3C, 02-106 Warsaw, Poland; (K.C.C.); (M.G.-S.); (M.R.)
| | - Renata Welc-Falęciak
- Department of Parasitology, Faculty of Biology, University of Warsaw, ul. Miecznikowa 1, 02-096 Warsaw, Poland; (M.B.); (R.W.-F.)
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Zhou Y, Liu Y, Wen Y. Primary Toxoplasma gondii infection-associated with hemophagocytic syndrome in a man with HIV infection: a case report. BMC Infect Dis 2022; 22:35. [PMID: 34991519 PMCID: PMC8740471 DOI: 10.1186/s12879-021-07022-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 12/30/2021] [Indexed: 12/03/2022] Open
Abstract
Background Reactivation of latent Toxoplasma gondii (T. gondii) infection is more common than primary infection in patients with human immunodeficiency virus (HIV). We report a rare case of primary T. gondii infection-associated hemophagocytic syndrome (HPS). Case presentation A man with HIV infection presented with fever, dyspnea and pancytopenia. He was diagnosed with primary T. gondii infection by the seroconversion from single-positive IgM antibody to double-positive IgM and IgG antibody. Metagenomic next-generation sequencing (mNGS) of a plasma sample yielded high reads of T. gondii DNA. He responded well to combined anti-Toxoplasma medicines and glucocorticoid treatment. Conclusions In patients with HPS and positive T. gondii IgM antibody, mNGS analysis of a peripheral blood sample is helpful in diagnosing disseminated T. gondii infection. The dynamic changes by serological detection for IgM and IgG of T. gondii further supported the inference that the patient has experienced a primary T. gondii infection.
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Affiliation(s)
- Ying Zhou
- Department of Infectious Diseases, The First Affiliated Hospital of China Medical University, No. 155, Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, China
| | - Yongfeng Liu
- BGI Pathogenesis Pharmaceutical TechnologyBGI-Shenzhen, Shenzhen, Guangdong Province, China
| | - Ying Wen
- Department of Infectious Diseases, The First Affiliated Hospital of China Medical University, No. 155, Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, China.
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Rafati-Sajedi H, Majidi-Shad B, Jafari-Shakib R, Atrkar-Roshan Z, Mahmoudi MR, Rezvani SM. Serological Evaluation of Toxoplasmosis and Related Risk Factors Among HIV +/AIDS Patients in Northern Iran. Acta Parasitol 2021; 66:1417-1423. [PMID: 34021879 DOI: 10.1007/s11686-021-00410-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/05/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Toxoplasma gondii is an important opportunistic intracellular protozoan parasite that can cause severe sequelae and even death in immunodeficient patients. This study aimed to evaluate the seroprevalence and risk factors of toxoplasmosis among HIV+/AIDS patients of the study area. METHODS A cross-sectional study was carried out on 121 registered HIV+/AIDS patients of behavioral diseases consultation center (BDCC) in Guilan province, north of Iran. Anti-Toxoplasma IgG and IgM antibodies were measured by ELISA technique in the serum samples. IgG avidity was measured for IgG- plus IgM-positive cases. Also, the relationship between T. gondii infection and related demographic and clinical characteristics were investigated. RESULTS Anti-T. gondii IgG and IgM antibodies were detected in 60.3 and 4.9% of patients, respectively. One case of acute toxoplasmosis (0.83%) was detected using an IgG avidity test. A significant correlation was observed between toxoplasmosis with age and marital status in these patients. The mean CD4+count of HIV+/AIDS patients was 549 ± 27 cells/µl. Viral load in 69.7% of the HIV patients was less than1000 copies/ml. CONCLUSION None of the T. gondii IgM-positive HIV patients received anti-Toxoplasma prophylaxis. This finding highlights the importance of T. gondii infection surveillance in HIV patients. Regarding the high prevalence of toxoplasmosis in the study population, educational efforts are recommended to prevent reactivation or acquiring primary infection and developing severe cases of toxoplasmosis in immunocompromised HIV+/AIDS patients.
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Sina S, Mohammad JM, Reza S, Anita M, Soudabeh E, Hadi M. Determination of parasitic burden in the brain tissue of infected mice in acute toxoplasmosis after treatment by fluconazole combined with sulfadiazine and pyrimethamine. Eur J Med Res 2021; 26:65. [PMID: 34193287 PMCID: PMC8243906 DOI: 10.1186/s40001-021-00537-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 06/22/2021] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND/AIMS One of the opportunistic pathogens which cause serious problems in the human immune system is Toxoplasma gondii, with toxoplasma encephalitis (TE) seen in patients affected by it. The treatment of these patients is limited, and if not treated on time, death will be possible. METHODS In this study, the effects of the treatment with different doses of fluconazole (FLZ) in combination with the current treatment of acute toxoplasmosis on reducing the mortality rate and the parasitic load in the murine model in vivo were studied. The mice were treated with different doses of fluconazole alone, sulfadiazine, and pyrimethamine plus fluconazole. A day after the end of the treatment and 1 day before death, the mice's brains were collected, and after DNA extraction and molecular tests, the parasite burden was detected. RESULTS This study showed that a 10-day treatment with 20 mg/kg of fluconazole combined with sulfadiazine and pyrimethamine 1.40 mg/kg per day affected acute toxoplasmosis and reduced the parasitic load significantly in brain tissues and also increased the survival rate of all mice in this group until the last day of the study, in contrast to other treatment groups. These results also indicate the positive effects of combined therapy on Toxoplasma gondii and the prevention of relapse. CONCLUSIONS Reducing the parasitic burden and increasing the survival rate were more effective against acute toxoplasmosis in the combined treatment of different doses of fluconazole with current treatments than current treatments without fluconazole. In other words, combination therapy with fluconazole plus pyrimethamine reduced the parasitic burden in the brain significantly, so it could be a replacement therapy in patients with intolerance sulfadiazine.
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Affiliation(s)
- Sekandarpour Sina
- Infectious Disease and Tropical Medicine Research Center, Resistance Tuberculosis Institute, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Medical Parasitology and Mycology, Faculty of Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Jafari Modrek Mohammad
- Infectious Disease and Tropical Medicine Research Center, Resistance Tuberculosis Institute, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Medical Parasitology and Mycology, Faculty of Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Shafiei Reza
- Vector-Borne Diseases Research Center, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Mohammadiha Anita
- Department of Parasitology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Etemadi Soudabeh
- Infectious Disease and Tropical Medicine Research Center, Resistance Tuberculosis Institute, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Medical Parasitology and Mycology, Faculty of Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mirahmadi Hadi
- Infectious Disease and Tropical Medicine Research Center, Resistance Tuberculosis Institute, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Medical Parasitology and Mycology, Faculty of Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
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Rosário MKSD, Silva J, Melo HFR, Monteiro TRM, Costa DRD, Scofield A, Moraes CCGD. Molecular investigation of Toxoplasma gondii in oysters (Crassostrea spp.) sold on beaches in the State of Pará, Brazil. ACTA ACUST UNITED AC 2021; 30:e023320. [PMID: 33729317 DOI: 10.1590/s1984-29612021004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 01/14/2021] [Indexed: 11/22/2022]
Abstract
The aim of this study was to detect Toxoplasma gondii DNA in oysters (Crassostrea spp.) sold on seven beaches in the State of Pará, Brazil. According to the National Program for Hygiene and Sanitary Control of Bivalve Mollusks, 100 g of the edible part of mollusks is required to analyze contaminating microorganisms. In this study, 12 oysters were assumed to be equivalent to 100 g of edible parts when preparing each pooled sample. In total, 360 oysters were purchased from 30 vendors. From groups of 12 oysters purchased per vendor, 60 pooled samples were obtained, comprising 30 gill tissues and 30 gastrointestinal tracts. For molecular analysis, nested-PCR was conducted to amplify a 155-base-pair product of the B1 gene from T. gondii. All analyzed samples were negative for T. gondii. Our findings indicate that the oyster samples sold on the beaches in the State of Pará were not contaminated by T. gondii.
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Affiliation(s)
- Marcely Karen Santos do Rosário
- Laboratório de Zoonoses e Saúde Pública, Programa de Pós-graduação em Saúde Animal na Amazônia, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal - UFPA, Castanhal, PA, Brasil
| | - Jacqueline Silva
- Laboratório de Zoonoses e Saúde Pública, Programa de Pós-graduação em Saúde Animal na Amazônia, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal - UFPA, Castanhal, PA, Brasil
| | - Hugo Filipe Rodrigues Melo
- Laboratório de Patologia Animal, Programa de Pós-graduação em Saúde Animal na Amazônia, Instituto de Medicina Veterinária, Universidade Federal do Pará - UFPA, Castanhal, PA, Brasil
| | - Thamillys Rayssa Marques Monteiro
- Residência Multiprofissional em Área da Saúde, Especialidade de Medicina Veterinária Preventiva, Instituto de Saúde e Produção Animal - ISPA, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil
| | - Davi Ribeiro da Costa
- Programa de Pós-graduação em Engenharia Civil, Instituto de Tecnologia, Universidade Federal do Pará - UFPA, Belém, PA, Brasil
| | - Alessandra Scofield
- Laboratório de Parasitologia Animal, Programa de Pós-graduação em Saúde Animal na Amazônia, Instituto de Medicina Veterinária, Universidade Federal do Pará - UFPA, Castanhal, PA, Brasil
| | - Carla Cristina Guimarães de Moraes
- Laboratório de Zoonoses e Saúde Pública, Programa de Pós-graduação em Saúde Animal na Amazônia, Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal - UFPA, Castanhal, PA, Brasil
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Ka'e AC, Sosso SM, Fokam J, Simo RK, Essama SR, Nka AD, Yagai B, Dzukou CJN, Tchouaket MCT, Chenwi C, Abba A, Fainguem N, Zam MKN, Yimga JF, Colizzi V, Ndjolo A. Anti-Toxoplasmic Immunoglobulin G Quantitation Correlates with Immunovirological Parameters of HIV-Infected Cameroonians. Curr HIV Res 2021; 19:73-83. [PMID: 32885755 DOI: 10.2174/1570162x18666200903172523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/14/2020] [Accepted: 08/05/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Toxoplasmosis is still a neglected common opportunistic infection in immunocompromised individuals, who are mainly people living with HIV (PLHIV) in whom reactivation of toxoplasmosis may occur with advanced HIV conditions in resource-limited settings (RLS). OBJECTIVE The objective was to assess the correlation between anti-toxoplasmic immunoglobulin G (anti-Toxo IgG) concentration and the immuno-virological status of PLHIV. METHODS A cross-sectional study was conducted in the year 2018 among 100 PLHIV aged ≥18 years in Yaounde-Cameroon. For each participant, anti-Toxo IgG, CD4-T lymphocytes, and plasma viral load (PVL) were measured using ELISA, flow cytometry, and real-time PCR, respectively. RESULTS Overall, 56% of the participants were seropositive for anti-Toxo IgG, while 33% were negative and 11% were equivocal. All (n=19) those with PVL>1000 copies/mL were seropositive to anti-Toxo IgG versus 52.85% (37/70) with PVL<1000 copies/mL; p<0.0001. Interestingly, all (n=11) those with severe immunodeficiency (T-CD4<200 cells/μL) were positive to anti-Toxo IgG versus 57.69% (45/78) with T-CD4>200 cells/μL; p<0.0001. Most importantly, PVL and anti- Toxo IgG concentration were positively correlated (r = 0.54; p<0.0001), while T-CD4 and anti- Toxo IgG concentration were negatively correlated (r = - 0.70; p<0.0001). Adjusting age, gender, immune status, and virological profile in logistic regression shows that only immune status was independently associated with the serological status of toxoplasmosis (p=0.0004). CONCLUSION In Cameroon, about half of PLHIV might be seropositive to anti-Toxo IgG, with decreasing immunity appearing as a risk of toxoplasmosis relapse. Thus, in the context of immunodeficiency, routine quantification of anti-Toxo IgG would alleviate the programmatic burden of this opportunistic infection in RLS with the generalized HIV epidemic.
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Affiliation(s)
- Aude Christelle Ka'e
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Samuel Martin Sosso
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Joseph Fokam
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Rachel Kamgaing Simo
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Sara Riwom Essama
- Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Alex Durand Nka
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Bouba Yagai
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | | | - Michel Carlos Tommo Tchouaket
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Collins Chenwi
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Aissatou Abba
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Nadine Fainguem
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Marie Krystel Nnomo Zam
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | - Junie Flore Yimga
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
| | | | - Alexis Ndjolo
- Chantal BIYA International Reference Center for Research on HIV/AIDS Prevention and Management (CIRCB), Yaounde, Cameroon
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Elazab ST, Soliman AF, Nishikawa Y. Effect of some plant extracts from Egyptian herbal plants against Toxoplasma gondii tachyzoites in vitro. J Vet Med Sci 2020; 83:100-107. [PMID: 33268605 PMCID: PMC7870401 DOI: 10.1292/jvms.20-0458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Nowadays, herbal extracts are considered to be a potential source for developing new drugs that will overcome resistance to conventional chemotherapeutic agents.
This study was aimed to explore the efficacy of several Egyptian plant extracts against Toxoplasma gondii infection in vitro for
future development of a new, safe, and effective compound for T. gondii. Methanol extracts from Matricaria chamomilla
(German chamomile), Laurus nobilis, Citrullus colocynthis, Cinnamum camphora, Boswellia
scara, and Melissa officionalis plants and oil extracts (either essential or fixed oils) of some plants such as: lemon grass
(Cymbopogon citratus), marjoram (Origanum majorana), watercress (Nasturtium officionale), wheat germ
(Triticum aestivum), sesame (Sesamum indicum), rosemary (Salvia rosmarinus), citronella (Cymbopogon
nardus), clove (Syzygum aromaticum), jojoba (Simmondsia chinesis), and basil (Ocimum basilicum) were investigated for
their anti-Toxoplasma activities. The methanol extracts from C. colocynthis and L. nobilis and the oil extracts
from lemon grass and marjoram were active against T. gondii with half maximal inhibitory concentrations (IC50) of 22.86 µg/ml, 31.35
µg/ml, 4.6 µg/ml, and 26.24 µg/ml, respectively. Their selectivity index (SI) values were <10. Interestingly, the methanol extract from M.
chamomilla and oil from citronella had the lowest IC50 values for T. gondii (3.56 µg/ml and 2.54 µg/ml, respectively) and the
highest SI values (130.33 and 15.02, respectively). In conclusion, methanol extract from M. chamomilla and oil from citronella might be potential
sources of novel therapies for treating toxoplasmosis.
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Affiliation(s)
- Sara T Elazab
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, El-Mansoura 35516, Egypt.,National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
| | - Amal F Soliman
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Yoshifumi Nishikawa
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
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ERGEN P, YILMAZ-KARADAĞ F, AYDIN Ö. Seroprevalence of Toxoplasma gondii in HIV-infected patients admitted to a university hospital. JOURNAL OF HEALTH SCIENCES AND MEDICINE 2020. [DOI: 10.32322/jhsm.752358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Park Y, Noh J, Seo HJ, Kim KH, Min S, Yoo MS, Yun BR, Kim JH, Choi EJ, Cheon DS, Hong SJ, Yoon SS, Cho YS. Seroprevalence and B1 gene Phylogeny of Toxoplasma gondii of Dogs and Cats in Republic of Korea. THE KOREAN JOURNAL OF PARASITOLOGY 2020; 58:257-265. [PMID: 32615739 PMCID: PMC7338905 DOI: 10.3347/kjp.2020.58.3.257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/11/2020] [Indexed: 12/17/2022]
Abstract
The outbreak of human toxoplasmosis can be attributed to ingestion of food contaminated with Toxoplasma gondii. Toxoplasmosis recently increased in domestic and stray dogs and cats. It prompted studies on the zoonotic infectious diseases transmitted via these animals. Sero- and antigen prevalences of T. gondii in dogs and cats were surveyed using ELISA and PCR, and B1 gene phylogeny was analyzed in this study. Toxoplasmosis antibodies were measured on sera of 403 stray cats, 947 stray dogs, 909 domestic cats, and 2,412 domestic dogs collected at nationwide regions, Korea from 2017 to 2019. In addition, whole blood, feces, and tissue samples were also collected from stray cats (1,392), stray dogs (686), domestic cats (3,040), and domestic dogs (1,974), and T. gondii-specific B1 gene PCR was performed. Antibody prevalence of stray cats, stray dogs, domestic cats, and domestic dogs were 14.1%, 5.6%, 2.3%, and 0.04%, respectively. Antigen prevalence of these animals was 0.5%, 0.2%, 0.1%, and 0.4%, respectively. Stray cats revealed the highest infection rate of toxoplasmosis, followed by stray dogs, domestic cats, and domestic dogs. B1 gene positives were 5 of stray cats, and identified to high/moderate pathogenic Type I/III group. These findings enforce that preventive hygienic measure should be strengthened at One Health level in dogs and cats, domestic and stray, to minimize human toxoplasmosis infections.
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Affiliation(s)
- Yeojin Park
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Jinhyeong Noh
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Hyun-Ji Seo
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Keun-Ho Kim
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Subin Min
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Mi-Sun Yoo
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Bo-Ram Yun
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Jong-Ho Kim
- Animal Pathodiagnostic Laboratory, Animal Disease Diagnostic Division, Department of Disease Control & Quarantine, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Eun-Jin Choi
- Animal Pathodiagnostic Laboratory, Animal Disease Diagnostic Division, Department of Disease Control & Quarantine, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | | | - Sung-Jong Hong
- Department of Medical Environmental Biology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Soon-Seek Yoon
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
| | - Yun Sang Cho
- Parasitic and Honeybee Disease Laboratory, Bacterial and Parasitic Disease Division, Department of Animal & Plant Health Research, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea
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Li Z, Sun CY, Yang RD, Xu CJ, Chen MC, Zhang YJ, Cong W, Zhu XQ, Liu Y, Zou FC. A Large-Scale Serological Survey of Toxoplasma gondii Infection Among Persons Participated in Health Screening in Yunnan Province, Southwestern China. Vector Borne Zoonotic Dis 2019; 19:441-445. [PMID: 30801237 DOI: 10.1089/vbz.2018.2334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Surveys of Toxoplasma gondii infection in animals have been reported in Yunnan province, southwestern China. However, limited information is available regarding the epidemiology of T. gondii infection among persons participated in health screening in Yunnan. From January 2014 to December 2016, a large-scale and cross-sectional serological survey was conducted to reveal the seroprevalence of T. gondii infection in persons participated in health screening in three major hospitals. A total of 64,533 serum samples were collected and anti-T. gondii antibodies were examined by commercially available enzyme-linked immunosorbent assay kits. The total seroprevalence of T. gondii infection was 6.67% (4306/64,533). Of these, 3721 persons (5.77%, 3721/64,533) were positive for Immunoglobulin G (IgG) only, 473 persons (0.73%, 473/64,533) were positive for Immunoglobulin M (IgM) only, and 112 persons (0.17%, 112/64,533) were positive for both IgG and IgM. Female seroprevalence (6.83%, 3167/46,389) was higher than male (6.28%, 1139/18,144). The highest seroprevalence of T. gondii infection was found in the age range of 41-50 years (10.60%, 228/2150) (p < 0.001). The seroprevalence in 2014, 2015, and 2016 were 6.39% (1083/16,946), 6.24% (1261/20,201), and 7.16% (1962/27,386), respectively. The results showed that T. gondii infection is common in persons participated in health screening in Yunnan province, which has significant public health concern. Thus, improved integrated measures should be executed to prevent and control T. gondii infection humans and animals in Yunnan province.
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Affiliation(s)
- Zhao Li
- 1 College of Veterinary Medicine, Yunnan Agricultural University, Kunming, P.R. China
| | - Chun-Yi Sun
- 2 Department of Gynecology, The Second Affiliated Hospital of Kunming Medical University, Kunming, P.R. China
| | - Ren-Dan Yang
- 1 College of Veterinary Medicine, Yunnan Agricultural University, Kunming, P.R. China
| | - Chang-Jun Xu
- 2 Department of Gynecology, The Second Affiliated Hospital of Kunming Medical University, Kunming, P.R. China
| | - Mei-Chen Chen
- 3 Yan'an Hospital of Kunming City and Yan'an Hospital Affiliated to Kunming Medical University, Kunming, P.R. China
| | - Yun-Jiang Zhang
- 4 Second People's Hospital of Yunnan Province and Yunnan Red Cross Hospital, Kunming, P.R. China
| | - Wei Cong
- 5 College of Marine Science, Shandong University, Weihai, P.R. China
| | - Xing-Quan Zhu
- 6 State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, P.R. China
| | - Yang Liu
- 2 Department of Gynecology, The Second Affiliated Hospital of Kunming Medical University, Kunming, P.R. China
| | - Feng-Cai Zou
- 1 College of Veterinary Medicine, Yunnan Agricultural University, Kunming, P.R. China
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Zhuo XH, Sun HC, Huang B, Yu HJ, Shan Y, Du AF. Evaluation of potential anti-toxoplasmosis efficiency of combined traditional herbs in a mouse model. J Zhejiang Univ Sci B 2018; 18:453-461. [PMID: 28585421 PMCID: PMC5482040 DOI: 10.1631/jzus.b1600316] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Toxoplasma gondii is a worldwide spread protozoan and is able to infect almost all warm-blood animals. No effective drugs are available clinically on toxoplasmosis. Chinese traditional herbal medicines have provided remedies for many health problems. There exists a possibility that Chinese herbs may provide protection against T. gondii. This work aims to assess the protective efficacy of combined Chinese herbs against T. gondii. We screened five herbal medicines that have different pharmacological effects and combined them into a prescription according to the traditional Chinese medicine compatibility principle. The drug potential and protective efficacy were evaluated through a mouse model by determining the survival time, the parasite load in blood and tissues, the change of cell proportions in blood and histological detection. The results showed that the survival time of mice in the 500 mg Chinese herbs group and sulfadiazine group was significantly longer than that of the PBS control group. Also the parasite load in blood and tissues of 500 mg Chinese herbs and sulfadiazine groups was significantly lower than that of PBS group at 7 days post infection (dpi), which was in accordance with the result of histological detection. Monocyte and neutrophil of infected mice were remarkably increased while lymphocyte was dramatically decreased compared to that of blank group at 7 dpi. The results demonstrated that the 500 mg dosage of our Chinese herbs could slow down the replication of T. gondii and prolong the survival time of mice and could be considered as possible candidate drug against toxoplasmosis.
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Affiliation(s)
- Xun-Hui Zhuo
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.,Department of Immunity and Biochemistry, Institute of Parasitic Disease, Zhejiang Academy of Medical Sciences, Hangzhou 310013, China
| | - Hong-Chao Sun
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Bin Huang
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hai-Jie Yu
- Jiaxing Vocational & Technical College, Jiaxing 314000, China
| | - Ying Shan
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ai-Fang Du
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
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12
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Liu L, Liu LN, Wang P, Lv TT, Fan YG, Pan HF. Elevated seroprevalence of Toxoplasma gondii in AIDS/HIV patients: A meta-analysis. Acta Trop 2017; 176:162-167. [PMID: 28784422 DOI: 10.1016/j.actatropica.2017.08.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/28/2017] [Accepted: 08/02/2017] [Indexed: 01/11/2023]
Abstract
Clinical toxoplasmosis in AIDS/HIV patients is a great public health concern around the world. Untreated Toxoplasma gondii (T. gondii)-infections are often fatal in AIDS/HIV patients. This study aims to assess the seroprevalence and odds ratio (OR) of T. gondii in AIDS/HIV patients, as well as the potential influential factors. Studies published from December 1, 1983 to December 1, 2016 in English, which comparing the seroprevalence of T. gondii between AIDS/HIV patients and control group were searched in PubMed, EMBASE and The Cochrane Library databases. The non-weighted prevalence, pooled fixed-effect or random-effect model estimates of OR and its 95% confidence intervals (CI) were all calculated. Heterogeneity test was performed by the Q statistic and quantified using I2, publication bias was evaluated using a funnel plot and Egger's linear regression test. A total of 4220 articles were obtained after searching databases, and 12 studies with 2101 AIDS/HIV patients and 5851 controls were incorporated in the meta-analysis. Meta-analysis revealed that, compared with the control group, the AIDS/HIV group had a higher seroprevalence of T. gondii (46.12% vs 36.56%) (OR=1.55, 95%CI: 1.19-2.04). Subgroup analyses showed that publication year, race, geographic locations and diagnostic methods are positive associated with the seroprevalence of T. gondii. Overall, our study suggests that AIDS/HIV patients have higher seroprevalence of T. gondii than those without.
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Ngobeni R, Samie A. PREVALENCE OF TOXOPLASMA GONDII IGG AND IGM AND ASSOCIATED RISK FACTORS AMONG HIV-POSITIVE AND HIV-NEGATIVE PATIENTS IN VHEMBE DISTRICT OF SOUTH AFRICA. Afr J Infect Dis 2017; 11:1-9. [PMID: 28670634 PMCID: PMC5476807 DOI: 10.21010/ajid.v11i2.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background: Toxoplasma gondii is a zoonotic parasite that has arisen as an important opportunistic infection that causes morbidity and mortality especially in HIV positive patients. This study was carried out to determine the sero-prevalence of T. gondii (IgG and IgM) and the associated risk factors among HIV positive and negative patients in Northern South Africa. Materials and Methods: The study was conducted in the Vhembe District in Limpopo province from April 2012 to January 2013. A well-structured questionnaire was used to collect socio-demographic information and possible risk factor information on toxoplasmosis from participants. A total of 161 blood samples of both HIV positive and negative patients visiting the local clinics in the Vhembe district were collected. Serum samples were tested for IgG and IgM against T. gondii using commercially available ELISA protocol. Results: The prevalence of T. gondii IgG was 31.7% while that of T. gondii IgM was 4.9%. The prevalence of T. gondii IgG was higher in HIV positive patients (38%) compared to 16.7% among HIV negative patients (p=0.001). Toxoplasma gondii IgG antibodies were more common in patients who were not taking ARV’s (46.2%) compared to those who were taking ARV’s (35.2%) (P<0.001). Conclusions: The present study has shown a high prevalence of T. gondii (IgG) among patients attending different HIV clinics in the Vhembe district with no current infections among pregnant women. In addition to the sero-positive status of the patient to HIV, other significant risk factors for toxoplasmosis included high viral load, non-adherence to ARV therapy and age (>25 years).
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Affiliation(s)
- Renay Ngobeni
- Molecular Parasitology and Opportunistic Infections Program, Department of Microbiology, School of Mathematical and Natural Sciences, University of Venda, South Africa
| | - Amidou Samie
- Molecular Parasitology and Opportunistic Infections Program, Department of Microbiology, School of Mathematical and Natural Sciences, University of Venda, South Africa
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14
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Wang ZD, Wang SC, Liu HH, Ma HY, Li ZY, Wei F, Zhu XQ, Liu Q. Prevalence and burden of Toxoplasma gondii infection in HIV-infected people: a systematic review and meta-analysis. LANCET HIV 2017; 4:e177-e188. [DOI: 10.1016/s2352-3018(17)30005-x] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 11/16/2016] [Accepted: 11/29/2016] [Indexed: 11/30/2022]
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15
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Wang ZD, Liu HH, Ma ZX, Ma HY, Li ZY, Yang ZB, Zhu XQ, Xu B, Wei F, Liu Q. Toxoplasma gondii Infection in Immunocompromised Patients: A Systematic Review and Meta-Analysis. Front Microbiol 2017; 8:389. [PMID: 28337191 PMCID: PMC5343064 DOI: 10.3389/fmicb.2017.00389] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/24/2017] [Indexed: 01/01/2023] Open
Abstract
Toxoplasma gondii has been suggested as an important opportunistic pathogen in immunocompromised patients. We conducted a global meta-analysis to assess the prevalence and odds ratios (ORs) of T. gondii infection in immunocompromised individuals. Electronic databases were reviewed for T. gondii infection in HIV/AIDS patients, cancer patients, and transplant recipients, and meta-analyses were conducted to calculate overall estimated prevalence and ORs using random or fixed-effects models. Totally, 72 eligible studies were included. The estimated pooled prevalence of T. gondii infection in immunocompromised patients and the control was 35.9 and 24.7% (p < 0.001), with an OR of 2.24, i.e., 42.1 and 32.0% for HIV/AIDS patients and the control (p < 0.05), 26.0 and 12.1% for cancer patients and the control (p < 0.001), and 42.1 and 34.5% for transplant recipients and the control (p > 0.05), whose estimated pooled ORs were 1.92 (95% CI, 1.44-2.55), 2.89 (95% CI, 2.36-3.55), and 1.51 (95% CI, 1.16-1.95), respectively. This study is the first to demonstrate that the immunocompromised patients are associated with higher odds of T. gondii infection, and appropriate prevention and control measures are highly recommended for these susceptible populations.
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Affiliation(s)
- Ze-Dong Wang
- College of Life Science, Jilin Agricultural UniversityChangchun, China; State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural SciencesLanzhou, China; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Military Veterinary Institute, Academy of Military Medical SciencesChangchun, China
| | - Huan-Huan Liu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Military Veterinary Institute, Academy of Military Medical Sciences Changchun, China
| | - Zhan-Xi Ma
- Department of Emergency Medicine, Inner Mongolia General Forestry Hospital Yakeshi, China
| | - Hong-Yu Ma
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Military Veterinary Institute, Academy of Military Medical Sciences Changchun, China
| | - Zhong-Yu Li
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Military Veterinary Institute, Academy of Military Medical Sciences Changchun, China
| | - Zhi-Bin Yang
- Medical Library of the Chinese people's Liberation Army Beijing, China
| | - Xing-Quan Zhu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences Lanzhou, China
| | - Bin Xu
- Center for Prevention and Control of Animal Diseases of Banan District in Chongqing Chongqing, China
| | - Feng Wei
- College of Life Science, Jilin Agricultural University Changchun, China
| | - Quan Liu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Military Veterinary Institute, Academy of Military Medical SciencesChangchun, China; Key Laboratory of Zoonoses, Ministry of EducationChangchun, China
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16
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Rezanezhad H, Sayadi F, Shadmand E, Nasab SDM, Yazdi HR, Solhjoo K, Kazemi A, Maleki M, Vasmehjani AA. Seroprevalence of Toxoplasma gondii among HIV Patients in Jahrom, Southern Iran. THE KOREAN JOURNAL OF PARASITOLOGY 2017; 55:99-103. [PMID: 28285515 PMCID: PMC5365268 DOI: 10.3347/kjp.2017.55.1.99] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/26/2016] [Accepted: 10/04/2016] [Indexed: 11/23/2022]
Abstract
Toxoplasma gondii is an important opportunistic agent especially in immunocompromised hosts and can cause significant morbidity and mortality. Hence, detection and monitoring of anti-Toxoplasma antibodies are of a great interest in HIV-infected patients. A study on the prevalence of toxoplasmosis and associated risk factors was carried out among HIV-infected patients in Jahrom, southern Iran. The prevalence of anti-Toxoplasma IgG antibodies was 21.1% in HIV-infected patients by ELISA. PCR was performed on all of the samples, and 1 of the blood samples was positively detected. Among the HIV patients, anti-Toxoplasma IgG antibodies were significantly higher in age group of 30-39 years old (P=0.05). The seroprevalence of toxoplasmosis in patients with CD4+<100 cells/μl was 33.3% that was significantly higher than the other groups (P=0.042) with or without IgG antibodies. The CD4+ count mean of seropositive patients was lower than that of seronegative patients. The seroprevalence of toxoplasmosis in patients with highly active antiretroviral therapy was significantly less than patients without therapy (P=0.02). In conclusion, this study showed low seroprevalence of latent toxoplasmosis among HIV-infected patients in the region and confirmed the need for intensifying prevention efforts among this high-risk population and also the risk of toxoplasmosis reactivation which could be important among this population.
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Affiliation(s)
- Hassan Rezanezhad
- Zoonoses Research Center, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Fateme Sayadi
- Department of Student Research Committee, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Enayatollah Shadmand
- Department of Microbiology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | | | - Hadi Rezaei Yazdi
- Department of Microbiology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Kavous Solhjoo
- Zoonoses Research Center, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Akbar Kazemi
- Department of Microbiology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Monireh Maleki
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Ahmadi Vasmehjani
- Department of Microbiology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
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17
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Yang Z, Hou Y, Hao T, Rho HS, Wan J, Luan Y, Gao X, Yao J, Pan A, Xie Z, Qian J, Liao W, Zhu H, Zhou X. A Human Proteome Array Approach to Identifying Key Host Proteins Targeted by Toxoplasma Kinase ROP18. Mol Cell Proteomics 2017; 16:469-484. [PMID: 28087594 DOI: 10.1074/mcp.m116.063602] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 12/20/2016] [Indexed: 12/18/2022] Open
Abstract
Toxoplasma kinase ROP18 is a key molecule responsible for the virulence of Toxoplasma gondii; however, the mechanisms by which ROP18 exerts parasite virulence via interaction with host proteins remain limited to a small number of identified substrates. To identify a broader array of ROP18 substrates, we successfully purified bioactive mature ROP18 and used it to probe a human proteome array. Sixty eight new putative host targets were identified. Functional annotation analysis suggested that these proteins have a variety of functions, including metabolic process, kinase activity and phosphorylation, cell growth, apoptosis and cell death, and immunity, indicating a pleiotropic role of ROP18 kinase. Among these proteins, four candidates, p53, p38, UBE2N, and Smad1, were further validated. We demonstrated that ROP18 targets p53, p38, UBE2N, and Smad1 for degradation. Importantly, we demonstrated that ROP18 phosphorylates Smad1 Ser-187 to trigger its proteasome-dependent degradation. Further functional characterization of the substrates of ROP18 may enhance understanding of the pathogenesis of Toxoplasma infection and provide new therapeutic targets. Similar strategies could be used to identify novel host targets for other microbial kinases functioning at the pathogen-host interface.
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Affiliation(s)
- Zhaoshou Yang
- From the ‡Department of Biochemistry and Molecular Biology, Sun Yat-Sen University Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Yongheng Hou
- From the ‡Department of Biochemistry and Molecular Biology, Sun Yat-Sen University Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Taofang Hao
- From the ‡Department of Biochemistry and Molecular Biology, Sun Yat-Sen University Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Hee-Sool Rho
- the §Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
| | - Jun Wan
- the ¶Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287
| | - Yizhao Luan
- the ‖State Key Lab of Ophthalmology, Guangdong Provincial Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.,the **School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xin Gao
- ‡‡The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China; and
| | - Jianping Yao
- §§The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - Aihua Pan
- From the ‡Department of Biochemistry and Molecular Biology, Sun Yat-Sen University Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China
| | - Zhi Xie
- the ‖State Key Lab of Ophthalmology, Guangdong Provincial Key Lab of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China
| | - Jiang Qian
- the ¶Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287
| | - Wanqin Liao
- From the ‡Department of Biochemistry and Molecular Biology, Sun Yat-Sen University Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China;
| | - Heng Zhu
- the §Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205;
| | - Xingwang Zhou
- From the ‡Department of Biochemistry and Molecular Biology, Sun Yat-Sen University Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China;
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