Publications by authors named "Bernard Mudenda Hang'ombe"

 The primary aim was to evaluate the prolonged quality characteristics of methyl diphosphonate (MDP) aliquots during ambient storage over a specified duration. This study further investigated potential additives that could enhance the stability of MDP aliquots stored under such conditions.  This was a laboratory-based experimental study conducted at the University Teaching Adult Hospital in Lusaka, Zambia.

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  • * A survey of poultry farmers in ten Zambian districts revealed that medium-/small-scale farmers used more antimicrobials but had fewer prescriptions compared to commercial farmers.
  • * Testing of 150 poultry isolates showed high resistance rates, especially to ampicillin and tetracycline, with the presence of extended-spectrum β-lactamase (ESBL) genes indicating significant AMR concerns in the poultry sector.
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  • Poultry is a vital, affordable source of nutrition in Zambian households, but diseases in chickens remain a significant concern for farmers.
  • A study examined 215 samples from diseased chickens in Lusaka, finding various bacteria responsible for infections, with over 40% of samples testing positive for specific pathogens.
  • High levels of antibiotic resistance were discovered, linked to improper antimicrobial use, raising public health concerns due to the presence of dangerous bacteria capable of producing extended-spectrum beta-lactamases (ESBLs).
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  • Inappropriate use of antimicrobials in Zambia's layer poultry sector contributes to rising antimicrobial resistance (AMR), with limited understanding of its drivers in the region.
  • A study involving 77 poultry farms analyzed samples to determine AMR levels and found a significant prevalence of multidrug resistance, particularly high among specific bacterial species.
  • Results indicated that larger farms and those aware of AMR issues had lower resistance levels, highlighting the need for educational efforts to improve AMR awareness among smaller farmers to address this public health concern.
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The emergence of pre-extensively drug-resistant tuberculosis (pre-XDR-TB) is a threat to TB control programs in developing countries such as Zambia. Studies in Zambia have applied molecular techniques to understand drug-resistance-associated mutations, circulating lineages and transmission patterns of multi-drug-resistant (MDR) . However, none has reported genotypes and mutations associated with pre-XDR TB.

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Background: infections are a public health problem across the globe. In South Sudan, there is little information regarding the prevalence and antibiotic resistance patterns of . Therefore, this study assessed the prevalence and antimicrobial susceptibility of isolates from chickens and humans in South Sudan.

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The presence of antimicrobial-resistant in poultry is a growing public health concern worldwide due to its potential for transmission to humans. The aim of this study was to determine the prevalence and patterns of antimicrobial resistance and to detect drug-resistant genes in and in poultry from four districts in Zambia. Identification of was conducted using phenotypic methods.

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We report sequences of the complete linear chromosome and five linear plasmids of the relapsing fever spirochete " Borrelia fainii" Qtaro. The chromosome sequence of 951,861 bp and the 243,291 bp of plasmid sequences were predicted to contain 852 and 239 protein-coding genes, respectively. The predicted total GC content was 28.

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  • Relapsing fever (RF) is caused by Borrelia spirochetes and is a significant public health issue in endemic areas like Africa, with limited research in Zambia.
  • A study analyzed 182 DNA samples from 886 Ornithodoros ticks in Zambian National Parks, revealing 43 positive for Borrelia, including both Old and New World RF types, marking the first evidence of Old-World RF in Zambia.
  • The findings suggest at least four Borrelia species exist in Zambia, and future research should focus on isolating these species and conducting serosurveys on RF-affected patients to understand the disease's complexity better.
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Increased antimicrobial resistance (AMR) has been reported for pathogenic and commensal , hampering the treatment, and increasing the burden of infectious diarrhoeal diseases in children in developing countries. This study focused on exploring the occurrence, patterns, and possible drivers of AMR isolated from children under-five years in Zambia. A hospital-based cross-sectional study was conducted in the Lusaka and Ndola districts.

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Pigs have been shown to be a reservoir for recently emerging livestock-associated (LA-SA), including methicillin resistant strains in many countries worldwide. However, there is sparse information about LA-SA strains circulating in Zambia. This study investigated the prevalence, phenotypic and genotypic characteristics of from pigs and workers at farms and abattoirs handling pigs in Lusaka Province of Zambia.

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Background: The food industry is increasingly becoming more scrutinized, given the frequency and intensity with which zoonotic diseases are being reported. Pathogen tracking has become more applicable with regards food safety. It is in this regard that the present study was formulated to track Listeria species.

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Antimicrobial resistance (AMR) is a global public health problem affecting animal and human medicine. Poultry production is among the primary sources of income for many Zambians. However, the increased demand for poultry products has led to a subsequent increase in antimicrobial use.

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Early detection and treatment are paramount for the timely control of Mycobacterium avium infections. Herein, we designed a LAMP assay targeting a widely used species-specific marker IS1245 for the rapid detection of M. avium and evaluated its applicability using human (n = 137) and pig (n = 91) M.

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  • Ticks are blood-feeding ectoparasites that host various microorganisms, including both pathogens and beneficial symbionts that aid in their growth and reproduction.
  • A study in Zambia screened 175 ticks from six different genera for the presence of a specific type of beneficial symbionts, called CLEs, finding that 45.7% were positive.
  • The research indicated a strong evolutionary connection between the ticks and their symbionts, supporting the idea that these CLEs are passed down through generations, but also highlighted the need to explore other potential microorganisms in Zambian ticks.
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Bovine tuberculosis (bTB) is a neglected disease that affects cattle and humans. The burden of bTB is higher in developing countries as compared to industrialized countries. The reasons behind this discrepancy include the fact that bTB control measures, such as testing and slaughter of infected cattle and pasteurization of milk, are not usually practised in developing countries largely because of their high cost.

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  • Ticks from the Ixodidae and Argasidae families are vital vectors for pathogens that affect both human and animal health, yet research has mostly concentrated on ixodid ticks.
  • This study focused on detecting and characterizing the Rickettsia and Anaplasmataceae pathogens in three argasid tick species found in Zambia, revealing significant prevalence in two species and highlighting a gap in knowledge about the diversity of these pathogens.
  • Findings suggest new geographical records for Rickettsia species in Africa and emphasize the need for more research on tick-borne bacteria to improve understanding of their epidemiology.
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A cross-sectional study was used to identify and assess prevalence and phenotypic antimicrobial resistance (AMR) profiles of and other enterobacteria isolated from healthy wildlife and livestock cohabiting at a 10,000 acres game ranch near Lusaka, Zambia. Purposive sampling was used to select wildlife and livestock based on similarities in behavior, grazing habits and close interactions with humans. Isolates ( = 66) from fecal samples collected between April and August 2018 ( = 84) were examined following modified protocols for bacteria isolation, biochemical identification, molecular detection, phylogenetic analysis, and antimicrobial susceptibility testing by disc diffusion method.

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Bovine tuberculosis (TB) caused by Mycobacterium bovis is a significant health threat to cattle and a zoonotic threat for humans in many developing countries. Rapid and accurate detection of M. bovis is fundamental for controlling the disease in animals and humans, and for the proper treatment of patients as one of the first-line anti-TB drug, pyrazinamide, is ineffective against M.

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  • Researchers have identified bat-associated bacteria called bartonellae in Zambia, particularly focusing on a species known as Bartonella rousetti.
  • They found that 16.7% of bats and 47.3% of bat flies sampled tested positive for the bacteria, with isolates coming from Egyptian fruit bats and unclassified bat-associated species.
  • The study emphasizes the need for ongoing monitoring of these bacteria in bats and testing in humans to assess their potential health risks.
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Bat trypanosomes consist of more than 30 trypanosome species from over 70 species of bats. Recent studies suggest that bats play a role in disseminating trypanosomes from African continent to the terrestrial mammals both in the Afrotropic-Palearctic Ecozones and Nearctic Ecozone. However, the diversity, distribution, and evolution of bat trypanosomes are still unclear.

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Background: Relapsing fever is an infectious disease previously neglected in Africa, which imposes a large public health burden in the country. We aimed to investigate and report on a case of relapsing fever borreliosis in Zambia.

Methods: A previously unknown Borrelia species was isolated from the blood of a febrile patient.

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Bacillus anthracis is a Gram-positive endospore-forming bacterial species that causes anthrax in both humans and animals. In Zambia, anthrax cases are frequently reported in both livestock and wildlife, with occasional transmission to humans, causing serious public health problems in the country. To understand the genetic diversity of B.

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In Zambia, anthrax outbreaks among cattle are reported on nearly an annual basis. Presently, there is a lack of serological assays and information to develop an anthrax management and control strategy. In this study, an indirect enzyme-linked immunosorbent assay (ELISA) based on recombinant protective antigen domain 1 (rPA-D1) of Bacillus anthracis was developed and used to detect anti-PA antibodies in cattle in Zambia.

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