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  1. Fulltext SINGLE NUCLEOTIDE POLYMORPHISM OF ECCB5 GENE OF MYCOBACTERIUM TUBERCULOSIS COMPLEX ISOLATES FROM SUSPECTED PULMONARY TB PATIENTS IN SURABAYA INDONESIA
    Kurniawati S, Soedarsono S, Aulanni'am A, Mertaniasih NM
    Afr J Infect Dis, 2018;12(2):37-42.
    PMID: 30109284 DOI: 10.21010/ajid.v12i2.6
    Background: Mycobacterium tuberculosis Complex (MTBC) is a group of Mycobacterium that causes tuberculosis (TB). TB is an infectious disease that remains a global health problem. Indonesia is one of the five countries in the world where TB is the most prevalent and became the country with tle second largest rate of TB in 2014 and 2015. MTBC has high pathogenicity that can cause infections in animals and humans. The most common route of transmission is via airborne droplet nuclei and contact with animals or humans infected with TB. MTBC has many virulence factors. One of these factors is EccB5 that is encoded by eccB5 gene. EccB5 is a transmembrane protein-conserved membrane protein and could play a role in inducing damage in host cells, macrophage infection, and may correlate with active disease. The characterization of eccB5 gene needs to be studied to determine the nucleotide sequences, which may be associated with active disease. The aim of this research was to analyze the nuclotide sequences of eccB5 gene of MTBC from suspected pulmonary tuberculosis patients, SNPs of eccB5 gene and possible correlation with the disease, especially in Indonesia.

    Materials and Methods: Samples were collected from the Tuberculosis Laboratory, Clinical Microbiology of Dr. Soetomo Hospital Surabaya Indonesia. DNA extraction used boiling extraction method and continued nucleic acid amplification using PCR techniques. Primer pairs used eccB5 SK.. The positivity of DNA specific revealed amplicon in 1592 bp. PCR product was sequenced by 1st Base (First BASE Laboratories Sdn Bhd, Selangor, Malaysia). The sequence analysis used Genetyx-Win version 10.0 (Genetyx Corporation, Tokyo, Japan).

    Results: Total isolates of Mycobacterium spp. were 28 and those that showed positive MTBC were 24 isolates and 4 nontuberculosis mycobacteria (NTM) using immunochromatographic test (ICT). The amount of homology from MTBC using blast NCBI was 99%-100%. Two SNPs were found in position c.1277 which revealed replacement of amino acid in 426 of codon position.

    Conclusion: The sequence of eccB5 gene of MTBC showed high significant homology, while proposed non-synoymous single nucleotide polymorphisms (nsSNP) may associated with clinical outcomes.

  2. PREVALENCE AND ASSOCIATED RISK FACTORS OF HEPATITIS B VIRUS INFECTION IN LAFIA METROPOLIS, NASARAWA STATE, NIGERIA
    Abel AG, Shamarina S, Hisham MNMN, Hafiz ARA
    Afr J Infect Dis, 2025;19(1):45-56.
    PMID: 39618539 DOI: 10.21010/Ajidv19i1.6
    BACKGROUND: Hepatitis B (HB), caused by the hepatitis B virus (HBV), remains a critical public health challenge in Nigeria. Globally, the HBV infects approximately 296 million people, significantly contributing to morbidity and mortality, with liver cirrhosis and liver cancer ranking as the 11th and 24th leading causes of death, respectively. This study aimed to determine the prevalence of HBV infection and the associated risk factors within the Lafia Metropolis, Nasarawa State, Nigeria.

    MATERIALS AND METHODS: A cross-sectional study was conducted from September to November 2023, utilizing a validated questionnaire to assess 461 randomly selected participants from four communities (Azuba, Bukan Sidi, Danka Sarki, and Doka), representing diverse sociodemographic profiles and varying degrees of exposure to risk factors associated with HBV infection. Data were analyzed using chi-square (χ2) tests with IBM SPSS statistical software version 28.0 at a significance level of p < 0.05.

    RESULTS: The findings showed that the overall prevalence of HBV infection was 7.8%. A significant association was observed between the prevalence of HBV infection and monthly income (p < 0.01). However, no associations were found with age, gender, educational level, marital status, occupation, or religion. Regarding risk factors, a significant association was found between HBV infection and awareness of one's HBV status (p < 0.03).

    CONCLUSION: These findings highlight the need for targeted public health interventions and policies aimed at reducing HBV transmission among high-risk sociodemographic groups in Lafia Metropolis. This approach could potentially reduce the burden of HBV and improve health outcomes in affected communities.

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