Molecular study of mycobacterium tuberculosis complex (MTBC) DNA from Port Elizabeth

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dc.contributor.advisorGreen, Een
dc.contributor.advisorNdip, R Nen
dc.contributor.advisorOkoh, Anthony Ien
dc.contributor.authorLondiwe, Bhembe Nolwazien
dc.date.accessioned2026-08-12T23:25:38Z
dc.date.available2026-08-12T23:25:38Z
dc.date.issued2014en
dc.description.abstractMycobacterium tuberculosis complex (MTBC) is a causative agent of tuberculosis (TB) in humans and animals. The burden of tuberculosis in South Africa is worsened by the concurrent epidemic of HIV. The dynamic of TB epidemics has been investigated and yet little data has been given about the Eastern Cape, particularly Port Elizabeth. The study aimed to investigate the prevalence of drug resistant MTBC and to determine the mutations causing resistance in Port Elizabeth. One hundred and ninety (190) DNA samples isolated from sputum specimen in humans suspected of having TB were amplified using the Seeplex® MTB Nested ACE detection assay. To differentiate Mycobacterium tuberculosis complex (MTBC) members for surveillance purposes a multiplex polymerase chain reaction (PCR) method was done based on genomic regions of differences such as RD1, RD1mic, RD2seal, RD4, RD9 and RD12. Target genes known to confer resistance to first and second-line drugs were amplified and the amplicons sequenced using Big Dye Terminator DNA sequencing kit v3.1 (Applied Biosystems, UK). The patient’s demographic profiles were obtained from the National Health Laboratory Service (NHLS). All hundred and ninety DNA samples tested positive for MTBC using the Seeplex® MTB Nested ACE assay. Results show a high prevalence of extensive drug resistant TB in Port Elizabeth, Eastern Cape Province. One hundred and eighty four (184) DNA isolates were used in the identification of different MTBC species. We ended up working with 184 DNA isolates because we ran out of DNA, and we could not go back to isolate DNA from the affected individuals due to the fact that some patients died, while some have been released to go to their homes. From the 184 DNA isolates 45 (24.5%) isolates were identified to be M. tuberculosis, 94 isolates (51.1%) to be M. bovis BCG and 3 isolates (1.6%) to be M. cannetti. Sequencing results show the position of mutation in each DNA isolate; however in the study we got resistance to MDR to be 100% and 42% pre-XDR while 58% was XDR. These results raise an alarm for the prevalence MDR in MTBC from Port Elizabeth. This is a serious health concern which calls for a need to strategise on the identification of extensive drug resistant TB patients from multi-drug resistant TB patients and ensure monitoring of their treatment.en
dc.format207 leaves; 30 cmen
dc.formatpdfen
dc.identifier.citationLondiwe, Bhembe Nolwazi. 2014en
dc.identifier.othervital:11281en
dc.identifier.otherhttp://hdl.handle.net/10353/d1016163en
dc.identifier.otherMycobacterium tuberculosisen
dc.identifier.urihttp://hdl.handle.net/20.500.11837/4541
dc.language.isoEnglishen
dc.publisherUniversity of Fort Hareen
dc.publisherFaculty of Science & Agricultureen
dc.rightsUniversity of Fort Hareen
dc.subjectMycobacterium tuberculosisen
dc.titleMolecular study of mycobacterium tuberculosis complex (MTBC) DNA from Port Elizabethen
dc.title.alternativeMolecular study of mycobacterium tuberculosis complex (MTBC) DNA from Port Elizabethen
dc.typeThesisen
dc.typeMastersen
dc.typeMSc (Microbiology)en

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