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- Whole Genome Sequence Analysis of Brucella spp. from Human, Livestock, and Wildlife in South Africa
- Koketso Desiree Mazwi, Kgaugelo Edward Lekota, Barbara Akofo Glover, Francis Babaman Kolo, Ayesha Hassim, Jenny Rossouw, Annelize Jonker, Justnya Maria Wojno, Giuseppe Profiti, Pier Luigi Martelli, Rita Casadio, Katiuscia Zilli, Anna Janowicz, Francesca Marotta, Giuliano Garofolo, Henriette van Heerden
- J. Microbiol. 2024;62(9):759-773. Published online July 22, 2024
- DOI: https://doi.org/10.1007/s12275-024-00155-8
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Abstract
- Brucellosis is an economically important zoonotic disease affecting humans, livestock, and wildlife health globally and especially in Africa. Brucella abortus and B. melitensis have been isolated from human, livestock (cattle and goat), and wildlife (sable) in South Africa (SA) but with little knowledge of the population genomic structure of this pathogen in SA. As whole genome sequencing can assist to differentiate and trace the origin of outbreaks of Brucella spp. strains, the whole genomes of retrospective isolates (n = 19) from previous studies were sequenced. Sequences were analysed using average nucleotide identity (ANI), pangenomics, and whole genome single nucleotide polymorphism (wgSNP) to trace the geographical origin of cases of brucellosis circulating in human, cattle, goats, and sable from different provinces in SA. Pangenomics analysis of B. melitensis (n = 69) and B. abortus (n = 56) was conducted with 19 strains that included B. abortus from cattle (n = 3) and B. melitensis from a human (n = 1), cattle (n = 1), goat (n = 1), Rev1 vaccine strain (n = 1), and sable (n = 12). Pangenomics analysis of B. melitensis genomes, highlighted shared genes, that include 10 hypothetical proteins and genes that encodes for acetyl-coenzyme A synthetase (acs), and acylamidase (aam) amongst the sable genomes. The wgSNP analysis confirmed the B. melitensis isolated from human was more closely related to the goat from the Western Cape Province from the same outbreak than the B. melitensis cattle sample from different cases in the Gauteng Province. The B. melitensis sable strains could be distinguished from the African lineage, constituting their own African sub-clade. The sequenced B. abortus strains clustered in the C2 lineage that is closely related to the isolates from Mozambique and Zimbabwe. This study identified genetically diverse Brucella spp. among various hosts in SA. This study expands the limited known knowledge regarding the presence of B. melitensis in livestock and humans in SA, further building a foundation for future research on the distribution of the Brucella spp. worldwide and its evolutionary background.
- Gut Lactobacillus and Probiotics Lactobacillus lactis/rhamnosis Ameliorate Liver Fibrosis in Prevention and Treatment
- Sung Min Won , Na Young Lee , Ki&# , Haripriya Gupta , Satya Priya Sharma , Kyung Hwan Kim , Byoung Kook Kim , Hyun Chae Joung , Jin Ju Jeong , Raja Ganesan , Sang Hak Han , Sang Jun Yoon , Dong Joon Kim , Ki Tae Suk
- J. Microbiol. 2023;61(2):245-257. Published online February 6, 2023
- DOI: https://doi.org/10.1007/s12275-023-00014-y
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Abstract
- The progression and exacerbation of liver fibrosis are closely related to the gut microbiome. It is hypothesized that some probiotics may slow the progression of liver fibrosis. In human stool analysis [healthy group (n = 44) and cirrhosis group (n = 18)], difference in Lactobacillus genus between healthy group and cirrhosis group was observed. Based on human data, preventive and therapeutic effect of probiotics Lactobacillus lactis and L. rhamnosus was evaluated by using four mice fibrosis models. L. lactis and L. rhamnosus were supplied to 3,5-diethoxycarbonyl-1,4-dihydrocollidine or carbon tetrachloride-induced liver fibrosis C57BL/6 mouse model. Serum biochemical measurements, tissue staining, and mRNA expression in the liver were evaluated. The microbiome was analyzed in mouse cecal contents. In the mouse model, the effects of Lactobacillus in preventing and treating liver fibrosis were different for each microbe species. In case of L. lactis, all models showed preventive and therapeutic effects against liver fibrosis. In microbiome analysis in mouse models administered Lactobacillus, migration and changes in the ratio and composition of the gut microbial community were confirmed. L. lactis and L. rhamnosus showed preventive and therapeutic effects on the progression of liver fibrosis, suggesting that Lactobacillus intake may be a useful strategy for prevention and treatment.
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Citations
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Heliyon.2023; 9(11): e21558. CrossRef - Agrocybe aegerita Polysaccharide Combined with Bifidobacterium lactis Bb-12 Attenuates Aging-Related Oxidative Stress and Restores Gut Microbiota
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Foods.2023; 12(24): 4381. CrossRef - Probiotics and liver fibrosis: An evidence-based review of the latest research
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Journal of Functional Foods.2023; 109: 105773. CrossRef
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