Sikhumbuzo Mbizeni

Sikhumbuzo Mbizeni

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Sikhumbuzo Mbizeni


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 January 2023 in Microbiology Research
Verified
Journal Article
Open access
PDF file
TMTsireledzo Goodwill Goodwill Makwarela
Tsireledzo Goodwill Goodwill Makwarela
NNNkululeko Nyangiwe
Nkululeko Nyangiwe
TMTracy Madimabi Masebe
Tracy Madimabi Masebe
SMSikhumbuzo Mbizeni
Sikhumbuzo Mbizeni
LNLucky T. Nesengani
Lucky T. Nesengani
NMNtanganedzeni Olivia Mapholi
Ntanganedzeni Olivia Mapholi
Ticks are amongst the important ectoparasites where livestock are concerned, as they adversely affect the animals through bloodsucking. In tropical and subtropical countries, they transmit pathogens such as babesiosis, theileriosis, ehrlichiosis, and anaplasmosis in cattle, causing a reduction in production rate and significant concomitant economic losses. Ticks affect 80% of the cattle population across the world, with an estimated economic loss of USD 20–30 billion per year. In South Africa, economic losses in the livestock industry caused by ticks and tick-borne diseases are estimated to exceed USD 33 million per year (ZAR 500 million). There are seven major genera of ixodid ticks in Southern Africa (i.e., Amblyomma, Dermacentor, Haemaphysalis, Hyalomma, Ixodes and Rhipicephalus). The environment in which a tick lives is made up of all the various biological and abiotic factors that are either necessary or unnecessary for its life. The areas where various ticks have been found have been documented in many publications. Using these data, maps of possible species’ habitats can be made. Historical records on tick distribution may be incorrect due to identification mistakes or a change in the tick’s name. All the sources used to generate the maps for this review were unpublished and came from a wide range of sources. To identify tick species and the accompanying microbial ecosystems, researchers are increasingly adopting tick identification methods including 16S and 18S rDNA gene sequencing. Indeed, little is known about the genetic alterations that give important traits, including the predilection for tick hosts, transmission, and acaricide resistance. Opportunities for exploring these changes in tick populations and subpopulations are provided by advancements in omics technologies. The literature on the variety of ixodid ticks, their direct and indirect effects, and control methods in South Africa is compiled in this review.

2 April 2022 in Pathogens
Verified
Journal Article
Open access
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ACAubrey Dickson Chigwada
Aubrey Dickson Chigwada
NMNtanganedzeni Olivia Mapholi
Ntanganedzeni Olivia Mapholi
HOHenry Joseph Oduor Ogola
Henry Joseph Oduor Ogola
SMSikhumbuzo Mbizeni
Sikhumbuzo Mbizeni
TMTracy Madimabi Masebe
Tracy Madimabi Masebe
Deciphering the interactions between ticks and their microbiome is key to revealing new insights on tick biology and pathogen transmission. However, knowledge on tick-borne microbiome diversity and their contribution to drug resistance is scarce in sub–Saharan Africa (SSA), despite endemism of ticks. In this study, high-throughput 16S rRNA amplicon sequencing and PICRUSt predictive function profiling were used to characterize the bacterial community structure and associated antibiotic resistance markers in Amblyomma variegatum, A. hebraeum, and Hyalomma truncatum ticks infesting Nguni cattle (Bos spp.). Twenty-one (seven families and fourteen genera) potentially pathogenic and endosymbiotic bacterial taxa were differentially enriched in two tick genera. In H. truncatum ticks, a higher abundance of Corynebacterium (35.6%), Porphyromonas (14.4%), Anaerococcus (11.1%), Trueperella (3.7%), and Helcococcus (4.7%) was detected. However, Rickettsia (38.6%), Escherichia (7%), and Coxiellaceae (2%) were the major differentially abundant taxa in A. variegatum and A. hebraeum. Further, an abundance of 50 distinct antibiotic resistance biomarkers relating to multidrug resistance (MDR) efflux pumps, drug detoxification enzymes, ribosomal protection proteins, and secretion systems, were inferred in the microbiome. This study provides theoretical insights on the microbiome and associated antibiotic resistance markers, important for the design of effective therapeutic and control decisions for tick-borne diseases in the SSA region.

10 February 2026 in Discover Sustainability
Verified
Journal Article
Open access
PDF file
MMMatome Moshobane Simeon Maake
Matome Moshobane Simeon Maake
CMC. A. Mbajiorgu
C. A. Mbajiorgu
DMDikeledi Petunia Malatji
Dikeledi Petunia Malatji
EUE. L. Udeh
E. L. Udeh
MMMokgoshi John Mamashila
Mokgoshi John Mamashila
FPF Phiri
F Phiri
A survey was conducted at the Community Engagement (CE) project of the University of South Africa (UNISA) in Katlehong Engineering School of Specialization in Gauteng province, South Africa. The study aimed to assess the agricultural training needs of participants to determine the project's value and direction. A total of 61 participants, primarily females aged 18 to 92 (mean age = 49), were surveyed. Data was analyzed using the Statistical Package for the Social Sciences with methods such as descriptive statistics, the Chi-square test, and the Friedman test. Most participants relied on government social grants and seasonal employment; over 75% were involved in agricultural activities, with education, age, and gender being significant influencing factors. Specifically, 72.1% were engaged in vegetable cultivation, 11.5% in field crops, and 9.8% in poultry farming. Training preferences indicated a strong interest in animal production, particularly layers and broilers (Mean Rank Score of 2.39 and 2.55), and in crop production, vegetable (Mean Rank Score of 1.36) ranked highest. In conclusion, the survey identified key agricultural skills and knowledge gaps within the Katlehong community, which will guide targeted agricultural training programs aimed at improving skills, food availability, and household income.

30 November 2023 in Veterinary Parasitology: Regional Studies and Reports
Verified
Journal Article
Open access
SMSikhumbuzo Mbizeni
Sikhumbuzo Mbizeni
BMBen J. Mans
Ben J. Mans
SMSamson Mukaratirwa
Samson Mukaratirwa
BPBrian Peba
Brian Peba
BMBoitumelo B. Maboko
Boitumelo B. Maboko
ALAbdalla A. Latif
Abdalla A. Latif
Theileria parva are intracellular protozoal parasites responsible for three disease syndromes in cattle, namely East Coast fever (ECF), Corridor disease (CD) and Zimbabwean theileriosis. The increase in reports of CD outbreaks in recent years has raised questions about the probability of adaptation of buffalo-derived T. parva strains in cattle herds adjacent to game reserves. A cross-sectional study was conducted from March 2016 to December 2018 to investigate the extent of occurrence of T. parva infections in cattle in the CD-controlled area of KwaZulu-Natal Province. Blood samples were collected from 1137 cattle from 14 herds and analysed by quantitative real-time PCR (qPCR) and indirect fluorescent antibody test (IFAT) to determine the prevalence of T. parva. A total of 484 samples from 4 of the 14 herds were further tested on qPCR for the presence of T. taurotragi infections. The data were analysed using descriptive statistics and a chi-square test was used to assess association between variables. The overall prevalence of T. parva was 1.3% (95%CI:1-2%) and 19.9% (95%CI:17-22%) on qPCR and IFAT, respectively. The qPCR positive samples were detected in March and May while IFAT positive samples were detected in all seasons sampled, with higher numbers during summer months. The Pearson Chi-squared test showed that T. parva prevalence rates based on both qPCR and IFAT were positively associated with herds with previous history of CD outbreaks (χ2 = 8.594, p = 0.003; χ2 = 69.513, p < 0.001, respectively). The overall prevalence of T. taurotragi was 39.4% (95% CI: 35-44%) with the herd-level prevalence ranging between 35.0% and 43.4%. Possible cross-reaction of T. parva IFAT to T. taurotragi was detected on few samples, however, there was no significant association between T. taurotragi infections and IFAT positivity (χ2 = 0.829, p = 0.363). Results from this study demonstrated the extent of occurrence of subclinical carriers and the level of exposure to T. parva infections in cattle populations at a livestock/game interface area of KwaZulu-Natal Province. The molecular and seroprevalence rates were low when compared with other areas where cattle-adapted T. parva infections are endemic. The adaptation of buffalo-derived T. parva in cattle population resulting in cattle-cattle transmissions seem to be unlikely under the current epidemiological state.