Article
Microbiology
Wanna Sirimanapong, Nguyen Ngoc Phuoc, Chiara Crestani, Swaine Chen, Ruth N. Zadoks
Summary: Group B Streptococcus (GBS) is a major pathogen in humans and aquatic species, and the ST283 sequence type has been identified as the cause of severe foodborne GBS disease in healthy adults in Southeast Asia. The distribution of potentially human-pathogenic GBS in aquaculture species is poorly known, and further research is needed.
Article
Microbiology
Chiara Crestani, Dinah Seligsohn, Taya L. Forde, Ruth N. Zadoks
Summary: Group B Streptococcus (GBS) is not only found in humans and neonates, but also affects animals, with significant impacts on health and productivity. In this study, GBS from one-humped camels in East Africa were analyzed, revealing a monophyletic Glade sublineage (SL)609. Capsular types IV and VI were over-represented in camel GBS compared to other host species. Genomic islands containing camel-associated genes, including those involved in metal and carbohydrate utilization, were identified. Lactose fermentation genes were found to be associated with milk isolates, although less prevalent in camel GBS compared to bovine GBS. The presence of a phage with high identity to Streptococcus pneumoniae and Streptococcus suis suggests lateral gene transfer between GBS and bacterial species not previously described in camels. The evolution of camel GBS combines host restriction with the sharing of accessory genome content across different pathogen and host species.
Article
Fisheries
Zhiqiang Zhang, Jinzhong Niu, Qi Li, Yongxiong Huang, Baijian Jiang, Xing Li, Jichang Jian, Yu Huang
Summary: A protein called CLEC12B was found in Nile tilapia, which is involved in the fish's immune response to bacterial infection. It plays a role in cell adhesion, turnover of glycoproteins, and the innate immune system's reaction to potential invaders.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Article
Fisheries
Zhiqiang Zhang, Qi Li, Yongxiong Huang, Baijian Jiang, Xing Li, Meiling Huang, Yu Huang, Jichang Jian
Summary: The study found that CD302, a member of the C-type lectin receptors (CLR) family, plays a role in the immune activities of tilapia against bacterial infection. It was observed that CD302 could bind to various pathogens and inhibit the growth of certain bacteria, while also reducing the phagocytic ability of macrophages towards these bacteria.
AQUACULTURE REPORTS
(2022)
Article
Fisheries
Liangliang Mu, Xiaoxue Yin, Hao Bai, Jiadong Li, Hairong Wu, Weiwei Qi, Bei Wang, Jianmin Ye
Summary: In this study, an L-rhamnose-binding lectin-like (OnRBL-1) was identified and characterized in Nile tilapia, showing its important role in recognition and agglutination of bacterial pathogens. The expression of OnRBL-1 was significantly upregulated in various tissues following challenges with pathogenic bacteria, indicating its involvement in the innate immune defense of O. niloticus.
Article
Fisheries
Kailiang Han, Liting Wu, Liangliang Mu, Hairong Wu, Xia Bian, Zheng Guo, Xiaoxue Yin, Jianmin Ye
Summary: The study shows that Nile tilapia BLNK plays a crucial role in regulating the B cell receptor signaling pathway, contributing to cell stress response and disease defense mechanisms.
Review
Immunology
Konstantinos Karampatsas, Hannah Davies, Maren Mynarek, Nick Andrews, Paul T. Heath, Kirsty Le Doare
Summary: Prematurity/low birth weight and maternal colonization are major risk factors for late-onset Group B streptococcal infection. Future vaccine studies should identify the optimal time for vaccination during pregnancy to protect preterm infants.
CLINICAL INFECTIOUS DISEASES
(2022)
Article
Microbiology
Nancy Jabbour, Eric Morello, Emilie Camiade, Marie-Frederique Lartigue
Summary: Regulatory small RNAs (sRNAs) play a role in bacterial adaptation, and CiaR-dependent sRNAs (csRNAs) controlled by the CiaRH two-component system are widely conserved in streptococci. In this study, the importance of a direct repeat TTTAAG-N5-TTTAAG in the regulation of csRNAs in Streptococcus agalactiae was demonstrated. The csRNA Srn024 was found to be involved in the posttranscriptional regulation of the sap gene, which encodes a pullulanase involved in biofilm formation and adhesion to human cervical epithelial cells. The disruption of the srn024-sap RNA pairing led to increased biofilm formation. The findings suggest that targeting regulatory RNAs like Srn024 could affect the abilities of pathogens to form biofilms and adapt to host niches.
MICROBIOLOGY SPECTRUM
(2022)
Article
Infectious Diseases
Xiaoman Wu, Fan Xiong, Hong Fang, Jie Zhang, Mingxian Chang
Summary: In this study, the functional correlation between NOD1 and histone H2A variant in response to Streptococcus agalactiae infection was reported. The deficiency of NOD1 promoted S. agalactiae proliferation and decreased larval survival in zebrafish. The results highlight the importance of NOD1 deficiency in immune-related and metabolic pathways regulation, and the correlation between zebrafish NOD1 and histone H2A variant in defense against S. agalactiae infection.
Article
Fisheries
Huiling Hu, Hongli Xia, Luxi Xu, Zhiwen Wang, Yishan Lu, Jichang Jian
Summary: This study explores the role of CD36 in the antimicrobial immunity of Nile tilapia. The results show that CD36 is conserved among species and is distributed in the cell membrane. CD36 gene is expressed in all tissues of healthy tilapia, with higher expression in immune tissues. Overexpression of CD36 reduces bacterial load and protects immune tissues from injury, and it also decreases pro-inflammatory factors and increases anti-inflammatory factors. CD36 may play a vital role in pathogen control and immune response in tilapia.
Article
Biochemistry & Molecular Biology
Nina M. van Sorge, Daniel A. Bonsor, Liwen Deng, Erik Lindahl, Verena Schmitt, Mykola Lyndin, Alexej Schmidt, Olof R. Nilsson, Jaime Brizuela, Elena Boero, Eric J. Sundberg, Jos A. G. van Strijp, Kelly S. Doran, Bernhard B. Singer, Gunnar Lindahl, Alex J. McCarthy
Summary: Streptococcus agalactiae, also known as group B Streptococcus (GBS), is a major cause of neonatal sepsis in humans. In a recent study, it was found that the surface-expressed beta protein of GBS binds to human CEACAM1 and CEACAM5 receptors, with the crystal structure revealing a novel IgI3 fold. This discovery suggests a potentially widely applicable mechanism for bacteria to target CEACAMs.
Article
Cell Biology
Kristin Jahn, Patience Shumba, Phoenicia Quach, Mathias Musken, Jan Wesche, Andreas Greinacher, Lakshmi Rajagopal, Sven Hammerschmidt, Nikolai Siemens
Summary: This study investigates the effects of GBS pigment on human platelets and finds that the pigment can induce platelet activation and necrotic cell death.
Article
Medicine, General & Internal
Pakpoom Phoompoung, Nantaporn Pirogard, Amornrut Leelaporn, Nasikarn Angkasekwinai
Summary: Invasive Group B streptococcal (iGBS) diseases are not uncommon in non-pregnant adults, particularly among older adults and those with diabetes. The study found that two-thirds of iGBS patients had bacteraemia, and the overall 30-day mortality rate was 11%.
ANNALS OF MEDICINE
(2021)
Article
Immunology
Allison N. Dammann, Anna B. Chamby, Francisco J. Gonzalez, Molly E. Sharp, Karina Flores, Ifrah Shahi, Sophia Dongas, Thomas A. Hooven, Adam J. Ratner
Summary: This study found that specific capsule types may provide an advantage in GBS vaginal colonization, but the success of certain GBS lineages may involve both capsule and non-capsule genetic elements.
JOURNAL OF INFECTIOUS DISEASES
(2022)
Article
Immunology
Denho Ravi, Erato Ntinopoulou, Nessim Guetta, Manuela Weier, Verena Vogel, Barbara Spellerberg, Parham Sendi, Sandrine Gremlich, Thierry Roger, Eric Giannoni
Summary: This study compares the response of newborn and adult macrophages to GBS. The findings show that newborn macrophages exhibit higher levels of cytokine release in response to GBS, and may play a significant role in the progression of GBS infection in newborns.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Infectious Diseases
Anastasia N. Tellis, Sam M. Rowe, Ronald Coilparampil, Cheryl Jenkins, Andrew Dart, Ruth N. Zadoks, Corey D. Regnerus, Katrina L. Bosward
Summary: This study evaluated three testing methods for detecting C. burnetii infection in alpacas, with results showing that immunofluorescence assay (IFA) may be the most appropriate method for use in alpacas. Different testing methods had varying specificity and sensitivity, with low positive predictive values.
TRANSBOUNDARY AND EMERGING DISEASES
(2022)
Article
Biodiversity Conservation
Gianluigi Rossi, Joseph Crispell, Tanis Brough, Samantha J. Lycett, Piran C. L. White, Adrian Allen, Richard J. Ellis, Stephen Gordon, Roland Harwood, Eleftheria Palkopoulou, Eleanor L. Presho, Robin Skuce, Graham C. Smith, Rowland R. Kao
Summary: Understanding how emergent pathogens establish and persist in new populations is crucial for disease ecology. This study analyzed the outbreak dynamics of Mycobacterium bovis in cattle and badgers in a low-risk area, using mathematical modeling, evolutionary analyses, and machine learning. The findings not only supported initial outbreak control decisions based on whole-genome sequencing but also provided insights for future outbreaks control and rapid decision-making based on evidence. The methods developed are valuable for other slowly transmitting pathogens as well.
JOURNAL OF APPLIED ECOLOGY
(2022)
Article
Genetics & Heredity
Taya L. Forde, Tristan P. W. Dennis, O. Rhoda Aminu, William T. Harvey, Ayesha Hassim, Ireen Kiwelu, Matej Medvecky, Deogratius Mshanga, Henriette Van Heerden, Adeline Vogel, Ruth N. Zadoks, Blandina T. Mmbaga, Tiziana Lembo, Roman Biek
Summary: Genomic sequencing has provided valuable insights into bacterial disease epidemiology. Our study in the Ngorongoro Conservation Area, Tanzania, reveals a diverse population of B. anthracis with limited geographic structure, suggesting a wide transmission bottleneck. These findings have important implications for anthrax control strategies.
MICROBIAL GENOMICS
(2022)
Review
Ecology
Dennis N. Makau, Samantha Lycett, Matthew Michalska-Smith, Igor A. D. Paploski, Maxim C-J Cheeran, Meggan E. Craft, Rowland R. Kao, Declan C. Schroeder, Andrea Doeschl-Wilson, Kimberly VanderWaal
Summary: Interactions among co-circulating viral strains in host populations have significant implications for virus transmission dynamics and can be influenced by host immune responses and strain fitness. This review highlights the importance of studying multi-strain dynamics from ecological and evolutionary perspectives and provides an overview of the scales at which these dynamics occur. The review also summarizes various approaches, including immunological, phylogenetic, and mathematical modeling, used to quantify interactions among strains and explores the influence of host-pathogen interactions on pathogen coexistence. Outstanding questions and knowledge gaps in the field of multi-strain virus dynamics are discussed, with a focus on opportunities for future work.
NATURE ECOLOGY & EVOLUTION
(2022)
Review
Veterinary Sciences
R. N. Zadoks, E. Scholz, S. M. Rowe, J. M. Norris, H. B. Pooley, J. House
Summary: There are many culture-based diagnostics available for on-farm detection of bacterial pathogens in milk, which may help improve antimicrobial use in udder health management. However, farms have limited diagnostic microbiology capacity. The World Health Organisation has established criteria called ASSURED for evaluating diagnostic tests in low-resource settings, and this article reviews how these criteria can be applied to the diagnosis of mastitis pathogens and the performance of on-farm diagnostics in Australia. The evaluation reveals trade-offs and highlights the importance of considering the specific needs and characteristics of each farm.
AUSTRALIAN VETERINARY JOURNAL
(2023)
Article
Environmental Sciences
Derek T. Elsby, Ruth N. Zadoks, Kenneth Boyd, Nuno Silva, Margo Chase-Topping, Mairi C. Mitchel, Carol Currie, Mark A. Taggart
Summary: Antimicrobial resistance (AMR) is a recognized threat to global health. This study examined the prevalence of AMR Escherichia coli in fecal samples from deer in Scotland and investigated potential risk factors associated with AMR occurrence. The results showed that resistant E. coli strains were present in wild deer populations, with different risk factors influencing resistance phenotypes and deer species. However, overall, resistance to critically important antimicrobials was found to be low, suggesting no immediate cause for concern regarding human health. Therefore, wild deer in Scotland could serve as a sentinel species for AMR surveillance in the Scottish environment.
ENVIRONMENTAL POLLUTION
(2022)
Article
Multidisciplinary Sciences
Gonzalo Yebra, Joshua D. Harling-Lee, Samantha Lycett, Frank M. Aarestrup, Gunhild Larsen, Lina M. Cavaco, Keun Seok Seo, Sam Abraham, Jacqueline M. Norris, Tracy Schmidt, Marthie M. Ehlers, Daniel O. Sordelli, Fernanda R. Buzzola, Wondwossen A. Gebreyes, Juliano L. Goncalves, Marcos Dos Santos, Zunita Zakaria, Vera L. M. Rall, Orla M. Keane, Dagmara A. Niedziela, Gavin K. Paterson, Mark A. Holmes, Tom C. Freeman, J. Ross Fitzgerald
Summary: This study traces the evolutionary history of bovine Staphylococcus aureus and identifies seven major endemic clones causing bovine mastitis globally. The clones originated from four independent host-jump events from humans up to 2,500 years ago. The expansion of these clones coincided with the commercialization and industrialization of dairy farming. Differences in host transmission events between humans and cows were also discovered, highlighting high-risk clones that pose threats to veterinary and human health.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Agriculture, Dairy & Animal Science
Patricia B. A. Simoes, Lorenzo Viora, Pieter T. T. Pepler, Timothy Geraghty, Dominic J. J. McCafferty, Ruth N. N. Zadoks
Summary: Mastitis, which is a common disease among dairy cattle, can be overlooked in heifers. A study found that measuring udder surface temperature can help detect mastitis early. The research showed that a single thermal image can be used to scan the entire udder of primigravid heifers in a simple and safe way.
Article
Agriculture, Dairy & Animal Science
K. Persson Waller, A. Lundberg, S. Borjesson, A. -K. Nyman
Summary: This study aimed to compare the occurrence of intramammary infection (IMI) between herds and investigate animal factors influencing udder health. The results showed that the differences in IMI between herds were related to differences in somatic cell count, and Staph. chromogenes was the most common IMI. These findings suggest the need for further research on the reasons for Staph. chromogenes IMI in FCH.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Multidisciplinary Sciences
Shazia Bashir, Nguyen Ngoc N. Phuoc, Tharangani Herath, Abdul Basit, Ruth Zadoks, Sudaxshina Murdan
Summary: Intensive tilapia farming has led to the emergence of novel pathogens, including Streptococcus agalactiae (GBS) which caused the first outbreak of foodborne GBS illness in humans. A proof-of-concept study developed an oral vaccine that provided significant protection from GBS in tilapia, showing promise for future use against other bacterial pathogens and fish species.
Review
Fisheries
Olga L. M. Haenen, Ha Thanh Dong, Truong Dinh Hoai, Margaret Crumlish, Iddya Karunasagar, Timothy Barkham, Swaine L. Chen, Ruth Zadoks, Andreas Kiermeier, Bing Wang, Esther Garrido Gamarro, Masami Takeuchi, Mohammad Noor Amal Azmai, Belen Fouz, Rolando Pakingking, Zeng Wei Wei, Melba G. Bondad-Reantaso
Summary: Tilapia culture is a significant source of income and nutrition for rural families. However, intensification and global warming have led to bacterial disease outbreaks in tilapia farms, threatening sustainable production. This review provides an overview of common and emerging bacterial pathogens, diseases, diagnostics, and the risks of antimicrobial resistance in tilapia.
REVIEWS IN AQUACULTURE
(2023)
Article
Microbiology
Nakarin Pamornchainavakul, Igor A. D. Paploski, Dennis N. N. Makau, Mariana Kikuti, Albert Rovira, Samantha Lycett, Cesar A. A. Corzo, Kimberly VanderWaal
Summary: The repeated emergence of new genetic variants of PRRSV-2 indicates its rapid evolution and the failure of previous control efforts. This study investigates the spatiotemporal heterogeneity in variant emergence and spread, identifies the origins of sub-lineage emergence, and maps the inter-regional spread patterns of PRRSV-2 Lineage 1 (L1) in the U.S. and Canada. The findings provide valuable insights for disease control and containment strategies.
Article
Microbiology
Wanna Sirimanapong, Nguyen Ngoc Phuoc, Chiara Crestani, Swaine Chen, Ruth N. Zadoks
Summary: Group B Streptococcus (GBS) is a major pathogen in humans and aquatic species, and the ST283 sequence type has been identified as the cause of severe foodborne GBS disease in healthy adults in Southeast Asia. The distribution of potentially human-pathogenic GBS in aquaculture species is poorly known, and further research is needed.
Article
Veterinary Sciences
S. Rowe, C. Cunningham, L. Ingenhoff, J. M. Norris, R. N. Zadoks
Summary: This study aimed to determine the presence of MRSA, ESBL-producing Enterobacteriaceae, and VRE in bulk tank milk in NSW, Australia. No samples tested positive for these antimicrobial resistant organisms, indicating a low prevalence in dairy herds in NSW.
AUSTRALIAN VETERINARY JOURNAL
(2023)
Article
Agriculture, Dairy & Animal Science
K. Persson Waller, M. Myrenas, S. Borjesson, H. Kim, M. Widerstrom, T. Monsen, A. K. Sigurdarson Sandholt, E. Ostlund, W. Cha
Summary: This study investigated the genotypic variation and relatedness of Staphylococcus chromogenes and Staphylococcus simulans, commonly found in bovine subclinical mastitis. Whole-genome sequencing was used to characterize the isolates and analyze antimicrobial resistance and potential virulence factors. The study found substantial variation in genotypes and clusters among cows and herds, with some genotypes being spread between herds. The results also showed differences in inflammatory response and persistent intramammary infection at the udder quarter level for S. chromogenes subtypes. The findings provide new insights into the epidemiology of these infections and can inform future prevention and treatment strategies.
JOURNAL OF DAIRY SCIENCE
(2023)