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Silent Human Trypanosoma brucei gambiense Infections around the Old Gboko Sleeping Sickness Focus in Nigeria


Affiliations
1 Department of Animal Health, Federal College of Animal Health and Production Technology, PMB 001, Vom, Nigeria
2 Department of Veterinary Parasitology and Entomology, Ahmadu Bello University, PMB 1045, Zaria, Nigeria
 

Trypanosoma brucei gambiense causes Gambian trypanosomosis, a disease ravaging affected rural parts of Sub-Saharan Africa. We screened 1200 human blood samples for T. b. gambiense using the card agglutination test for trypanosomosis, characterized trypanosome isolateswith Trypanosoma gambiense serumglycoprotein-PCR (TgsGP-PCR), and analyzed our data using Chi square and odds ratio at 95%confidence interval for statistical association. Of the 1200 samples, the CATT revealed an overall infection rate of 1.8% which ranged between 0.0% and 3.5% across study sites. Age and sex based infection rates ranged between 1.2% and 2.3%. We isolated 7 (33.3%) trypanosomes from the 21 seropositive samples using immunosuppressed mice which were identified as T. b. gambiense group 1 by TgsGP-PCR. Based on study sites, PCR revealed an overall infection rate of 0.6% which ranged between 0.0% and 1.5%. Females and males revealed PCR based infection rates of 0.3% and 0.8%, respectively. Infection rates in adults (1.3%) and children (0.1%) varied significantly (p < 0.05). We observed silent T. b. gambiense infections among residents of this focus. Risks of disease development into the second fatal stage in these patients who may also serve as reservoirs of infection in the focus exist.
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  • Silent Human Trypanosoma brucei gambiense Infections around the Old Gboko Sleeping Sickness Focus in Nigeria

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Authors

Karshima Solomon Ngutor
Department of Animal Health, Federal College of Animal Health and Production Technology, PMB 001, Vom, Nigeria
Lawal A. Idris
Department of Veterinary Parasitology and Entomology, Ahmadu Bello University, PMB 1045, Zaria, Nigeria
Okubanjo Oluseyi Oluyinka
Department of Veterinary Parasitology and Entomology, Ahmadu Bello University, PMB 1045, Zaria, Nigeria

Abstract


Trypanosoma brucei gambiense causes Gambian trypanosomosis, a disease ravaging affected rural parts of Sub-Saharan Africa. We screened 1200 human blood samples for T. b. gambiense using the card agglutination test for trypanosomosis, characterized trypanosome isolateswith Trypanosoma gambiense serumglycoprotein-PCR (TgsGP-PCR), and analyzed our data using Chi square and odds ratio at 95%confidence interval for statistical association. Of the 1200 samples, the CATT revealed an overall infection rate of 1.8% which ranged between 0.0% and 3.5% across study sites. Age and sex based infection rates ranged between 1.2% and 2.3%. We isolated 7 (33.3%) trypanosomes from the 21 seropositive samples using immunosuppressed mice which were identified as T. b. gambiense group 1 by TgsGP-PCR. Based on study sites, PCR revealed an overall infection rate of 0.6% which ranged between 0.0% and 1.5%. Females and males revealed PCR based infection rates of 0.3% and 0.8%, respectively. Infection rates in adults (1.3%) and children (0.1%) varied significantly (p < 0.05). We observed silent T. b. gambiense infections among residents of this focus. Risks of disease development into the second fatal stage in these patients who may also serve as reservoirs of infection in the focus exist.