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Chlamydial Pneumonias

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Feed-borne Bacillus cereus exacerbates respiratory distress in chickens infected with Chlamydia psittaci by inducing haemorrhagic pneumonia.

Zonghui Zuo, Qiang Li, Yongxia Guo, Xiaohui Li, Shujian Huang, Johannes H Hegemann, Cheng He,

Chlamydia psittaci is an important zoonotic pathogen and its oral route of infection plays an important role in the transmission and persistence. Bacillus cereus (B. cereus) strain, a common contaminant of animal feed and feedstuffs, can cause severe diarrhoea and malnutrition in poultry. In our previous study, a B. cereus ... Read more >>

Avian Pathol. (Avian pathology : journal of the W.V.P.A)
[2020, :1-10]

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Chlamydiae from Down Under: The Curious Cases of Chlamydial Infections in Australia.

Martina Jelocnik,

In Australia, the most researched and perhaps the most successful chlamydial species are the human pathogen Chlamydia trachomatis, animal pathogens Chlamydia pecorum and Chlamydia psittaci. C. trachomatis remains the leading cause of sexually transmitted infections in Australians and trachoma in Australian Indigenous populations. C. pecorum is globally recognised as the ... Read more >>

Microorganisms (Microorganisms)
[2019, 7(12):]

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Establishment of a Multiplex Real-Time TaqMan-MGB Polymerase Chain Reaction (PCR) Method for the Simultaneous Detection of Three Animal Chlamydia Species.

Fuping Nie, Qian Gong, Jun Yang, Cunxian Xi, Yu Wang, Guomin Wang, Lei Zhang, Xianliang Li, Danqun Huo, Changjun Hou,

BACKGROUND Chlamydiae are spread globally and cause infectious diseases in both humans and animals. The existing detection methods for this disease have numerous shortcomings, including low sensitivity, time consuming procedures, and high contamination vulnerability. MATERIAL AND METHODS To overcome shortcomings for detecting animal chlamydiosis, a multiplex quantitative polymerase chain reaction ... Read more >>

Med. Sci. Monit. (Medical science monitor : international medical journal of experimental and clinical research)
[2019, 25:9369-9376]

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Insufficient initial treatment but good recovery after diagnosis of pulmonary actinomycosis.

Toshiki Ito, Takayuki Yoshida, Motoki Sakuraba, Akihiko Tanaka, Kunio Hamada, Akihide Ito,

Actinomycosis is an infrequent invasive bacterial disease. Although multiple different clinical features of actinomycosis have been described, pulmonary actinomycosis (PA) is a rare but challenging diagnosis and complete cure to make. Here we report the case of a 41-year-old Asian woman who had a mass-like consolidation in the right middle ... Read more >>

Oxf Med Case Reports (Oxford medical case reports)
[2019, 2019(12):510-512]

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Chlamydia-induced curvature of the host-cell plasma membrane is required for infection.

Sebastian Hänsch, Dominik Spona, Gido Murra, Karl Köhrer, Agathe Subtil, Ana Rita Furtado, Stephan F Lichtenthaler, Bastian Dislich, Katja Mölleken, Johannes H Hegemann,

During invasion of host cells, Chlamydia pneumoniae secretes the effector protein CPn0678, which facilitates internalization of the pathogen by remodeling the target cell's plasma membrane and recruiting sorting nexin 9 (SNX9), a central multifunctional endocytic scaffold protein. We show here that the strongly amphipathic N-terminal helix of CPn0678 mediates binding ... Read more >>

Proc. Natl. Acad. Sci. U.S.A. (Proceedings of the National Academy of Sciences of the United States of America)
[2020, 117(5):2634-2644]

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Interactions Screenings Unearth Potential New Divisome Components in the Chlamydia-Related Bacterium, Waddlia chondrophila.

Firuza Bayramova, Nicolas Jacquier, Gilbert Greub,

Chlamydiales order members are obligate intracellular bacteria, dividing by binary fission. However, Chlamydiales lack the otherwise conserved homologue of the bacterial division organizer FtsZ and certain division protein homologues. FtsZ might be functionally replaced in Chlamydiales by the actin homologue MreB. RodZ, the membrane anchor of MreB, localizes early at ... Read more >>

Microorganisms (Microorganisms)
[2019, 7(12):]

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Chronic Inflammatory Diseases at Secondary Sites Ensuing Urogenital or Pulmonary Chlamydia Infections.

Yi Ying Cheok, Chalystha Yie Qin Lee, Heng Choon Cheong, Chung Yeng Looi, Won Fen Wong,

Chlamydia trachomatis and C. pneumoniae are members of the Chlamydiaceae family of obligate intracellular bacteria. The former causes diseases predominantly at the mucosal epithelial layer of the urogenital or eye, leading to pelvic inflammatory diseases or blindness; while the latter is a major causative agent for pulmonary infection. On top ... Read more >>

Microorganisms (Microorganisms)
[2020, 8(1):]

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Assaying Chlamydia pneumoniae Persistence in Monocyte-Derived Macrophages Identifies Dibenzocyclooctadiene Lignans as Phenotypic Switchers.

Eveliina Taavitsainen, Maarit Kortesoja, Tanja Bruun, Niklas G Johansson, Leena Hanski,

Antibiotic-tolerant persister bacteria involve frequent treatment failures, relapsing infections and the need for extended antibiotic treatment. The virulence of an intracellular human pathogen C. pneumoniae is tightly linked to its propensity for persistence and means for its chemosensitization are urgently needed. In the current work, persistence of C. pneumoniae clinical ... Read more >>

Molecules (Molecules (Basel, Switzerland))
[2020, 25(2):]

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Anti-chlamydial activities of cell-permeable hydrophobic dipeptide-containing derivatives.

Ryota Itoh, Toshinori Soejima, Kenji Hiromatsu,

The obligate intracellular bacteria chlamydia is major human pathogen that causes millions of trachoma, sexually transmitted infections and pneumonia worldwide. We serendipitously found that both calpain inhibitors z-Val-Phe-CHO and z-Leu-Nle-CHO showed marked inhibitory activity against chlamydial growth in human epithelial HeLa cells, whereas other calpain inhibitors not. These peptidomimetic inhibitors ... Read more >>

J. Infect. Chemother. (Journal of Infection and Chemotherapy)
[2019, 25(12):987-994]

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Focusing on Families and Visitors Reduces Healthcare Associated Respiratory Viral Infections in a Neonatal Intensive Care Unit.

W Matthew Linam, Elizabeth M Marrero, Michele D Honeycutt, Christy M Wisdom, Anna Gaspar, Vini Vijayan,

Healthcare-associated respiratory viral infections (HARVIs) result in significant harm to infants in the neonatal intensive care unit (NICU). Healthcare workers and visitors can serve as transmission vectors to patients. We hypothesized that improved family and visitor hand hygiene (FVHH) and visitor screening would reduce HARVIs by at least 25%. Methods:This ... Read more >>

Pediatr Qual Saf (Pediatric quality & safety)
[2019, 4(6):e242]

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RNA based mNGS approach identifies a novel human coronavirus from two individual pneumonia cases in 2019 Wuhan outbreak.

Liangjun Chen, Weiyong Liu, Qi Zhang, Ke Xu, Guangming Ye, Weichen Wu, Ziyong Sun, Fang Liu, Kailang Wu, Bo Zhong, Yi Mei, Wenxia Zhang, Yu Chen, Yirong Li, Mang Shi, Ke Lan, Yingle Liu,

From December 2019, an outbreak of unusual pneumonia was reported in Wuhan with many cases linked to Huanan Seafood Market that sells seafood as well as live exotic animals. We investigated two patients who developed acute respiratory syndromes after independent contact history with this market. The two patients shared common ... Read more >>

Emerg Microbes Infect (Emerging microbes & infections)
[2020, 9(1):313-319]

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Chlamydia pneumoniae immunoglobulin E antibody levels in patients with asthma compared with non-asthma.

Tamar A Smith-Norowitz, Jeffrey Loeffler, Yvonne Huang, Elliot Klein, Yitzchok M Norowitz, Margaret R Hammerschlag, Rauno Joks, Stephan Kohlhoff,

Chlamydia pneumoniae is an obligate intracellular bacterium that causes respiratory infection in adults and children. There is evidence for an association between atypical bacterial pathogens and asthma pathogenesis. We sought to determine whether past C. pneumoniae infection triggers C. pneumoniae- IgE antibodies (Abs) in asthmatics and non-asthmatics, who had detectable IgG titers. ... Read more >>

Heliyon (Heliyon)
[2020, 6(2):e03512]

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2173. Detection of Chlamydia psittaci by rtPCR in Outbreak Specimens Tested at CDC—2018.

Olivia L McGovern, Kelly Shaw, Christine Szablewski, Julie Gabel, Caroline Holsinger, Skyler Brennan, Bernard Wolff, Alvaro J Benitez, Maureen Diaz, Kathleen A Thurman, Jonas Winchell, Miwako Kobayashi,

AbstractBackgroundPsittacosis is a respiratory illness caused by Chlamydia psittaci. The most commonly available diagnostic tests are serologic tests, which have low sensitivity and can cross-react with other chlamydial species. Serologic tests also require paired sera collected weeks apart, which is impractical for patient management. Real-time polymerase chain reaction (rtPCR) testing ... Read more >>

Open Forum Infect Dis (Open forum infectious diseases)
[2019, 6(Suppl 2):S737-S738]

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Proteomic characterisation of the Chlamydia abortus outer membrane complex (COMC) using combined rapid monolithic column liquid chromatography and fast MS/MS scanning.

David Longbottom, Morag Livingstone, Kevin D Aitchison, Lisa Imrie, Erin Manson, Nicholas Wheelhouse, Neil F Inglis,

Data are presented on the identification and partial characterisation of proteins comprising the chlamydial outer membrane complex (COMC) fraction of Chlamydia abortus (C. abortus)-the aetiological agent of ovine enzootic abortion. Inoculation with the COMC fraction is known to be highly effective in protecting sheep against experimental challenge and its constituent ... Read more >>

PLoS ONE (PloS one)
[2019, 14(10):e0224070]

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Sphingolipid Metabolism and Transport in Chlamydia trachomatis and Chlamydia psittaci Infections.

Sebastian Banhart, Elena K Schäfer, Jean-Marc Gensch, Dagmar Heuer,

Chlamydia species infect a large range of vertebral hosts and have become of major economic and public health concern over the last decades. They are obligate intracellular bacteria that undergo a unique cycle of development characterized by the presence of two distinct bacterial forms. After infection of the host cell, ... Read more >>

Front Cell Dev Biol (Frontiers in cell and developmental biology)
[2019, 7:223]

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Prevalence, risk factors and molecular characterization of Chlamydia trachomatis in pregnant women from Córdoba, Argentina: A prospective study.

Ana Ximena Kiguen, Marcela Marramá, Susana Ruiz, Patricia Estofan, Raúl Fernando Venezuela, Jessica Paola Mosmann, Marina Soledad Monetti, Virginia Rivero, Cecilia Gabriela Cuffini,

BACKGROUND:Chlamydia trachomatis causes the most prevalent bacterial Sexual Transmitted Infection. In pregnant women, untreated chlamydial infections are associated with abortions, premature rupture of membranes, postpartum endometritis, low birth weight and transmission to the newborn. In Córdoba, Argentina, there is little knowledge about the prevalence of Chlamydia trachomatis in women in ... Read more >>

PLoS ONE (PloS one)
[2019, 14(5):e0217245]

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Survey on Chlamydiaceae in cloacal swabs from Swiss turkeys demonstrates absence of Chlamydia psittaci and low occurrence of Chlamydia gallinacean.

Barbara Renate Vogler, Michal Trinkler, Hanna Marti, Nicole Borel, Theresa Pesch, Barbara Prähauser, Richard Hoop, Prisca Mattmann, Sarah Albini,

In Switzerland, domestic turkey meat is a niche product. Turkeys are fattened on mixed family-based farms scattered across the country, with most providing access to an uncovered outdoor pasture for the birds. Swiss fattening turkeys may therefore get infected with Chlamydiaceae via wild birds or their faeces, potentially shedding these ... Read more >>

PLoS ONE (PloS one)
[2019, 14(12):e0226091]

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Multi-peptide ELISAs overcome cross-reactivity and inadequate sensitivity of conventional Chlamydia pneumoniae serology.

Kh Shamsur Rahman, Bernhard Kaltenboeck,

Cross-reactivity of classical chlamydial antigens compromises Chlamydia (C.) pneumoniae serology. By testing with 185 human antisera, we expanded 18 previously discovered C. pneumoniae-specific B-cell epitopes to 48 peptide antigens from 12 C. pneumoniae immunodominant proteins. For specific detection of antibodies against C. pneumoniae, we developed novel ELISAs with strongly reactive individual ... Read more >>

Sci Rep (Scientific reports)
[2019, 9(1):15078]

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Gemykibivirus Genome in Lower Respiratory Tract of Elderly Woman With Unexplained Acute Respiratory Distress Syndrome.

Jian Wang, Yanpeng Li, Xi He, Jinmin Ma, Wenxin Hong, Fengyu Hu, Lingzhai Zhao, Qiongfang Li, Jianhui Zhang, Chiyu Zhang, Fuchun Zhang,

Using metagenomics analysis, we are the first to identify the presence of a small, circular, single-stranded Gemykibivirus (GkV) genome from the respiratory tract of an elderly woman with severe acute respiratory distress syndrome. Our results suggest that further studies on whether GkVs infect humans and cause respiratory disease are needed. ... Read more >>

Clin. Infect. Dis. (Clinical infectious diseases : an official publication of the Infectious Diseases Society of America)
[2019, 69(5):861-864]

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Technologies, strategies and approaches for testing populations at risk of sexually transmitted infections: a systematic review protocol to inform prevention and control in EU/EEA countries.

Suzanna C Francis, Arun Parajuli, Otilia Mardh, Jane Falconer, Aura Andreasen, Emma Harding-Esch, ,

OBJECTIVES:This protocol outlines a systematic review methodology, aiming to assess the recent evidence-base for the impact of testing strategies and approaches on access to testing, testing coverage, and linkage to care for populations at risk for specific curable sexually transmitted infections (STIs) (chlamydia, gonorrhoea, syphilis, trichomoniasis, and Mycoplasma genitalium infections). ... Read more >>

Syst Rev (Systematic reviews)
[2020, 9(1):64]

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[Human Psittacosis: A Case Report].

Ana Cipriano, Ana Machado, Fábio Videira Santos, Miguel Araújo Abreu, Rui Sarmento Castro,

Psittacosis is a rare disease caused by Chlamydophila psittaci, an intracellular bacteria transmitted by contaminated birds. The clinical and radiological presentations are nonspecific. We describe a case of a 42-year-old woman, with known exposure to birds, who presented to the emergency department with one-week evolution of myalgia, polyarthritis, and respiratory ... Read more >>

Acta Med Port (Acta medica portuguesa)
[2019, 32(2):161-164]

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Olaptesed pegol (NOX-A12) with bendamustine and rituximab: a phase IIa study in patients with relapsed/refractory chronic lymphocytic leukemia.

Michael Steurer, Marco Montillo, Lydia Scarfò, Francesca R Mauro, Johannes Andel, Sophie Wildner, Livio Trentin, Ann Janssens, Sonja Burgstaller, Anna Frömming, Thomas Dümmler, Kai Riecke, Matthias Baumann, Diana Beyer, Stéphanie Vauléon, Paolo Ghia, Robin Foà, Federico Caligaris-Cappio, Marco Gobbi,

Olaptesed pegol (NOX-A12) is a pegylated structured L-oligoribonucleotide that binds and neutralizes CXCL12, a chemokine tightly regulating the life cycle of chronic lymphocytic leukemia cells. The resulting inhibition of CXCR4 and CXCR7 signaling reduces the protective activity of the bone marrow and lymph node microenvironment. CXCL12 inhibition mobilizes chronic lymphocytic ... Read more >>

Haematologica (Haematologica)
[2019, 104(10):2053-2060]

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Mini Review: Antimicrobial Control of Chlamydial Infections in Animals: Current Practices and Issues.

Sankhya Bommana, Adam Polkinghorne,

Chlamydia are a genus of successful obligate intracellular pathogens spread across humans, wildlife, and domesticated animals. The most common species reported in livestock in this genus are Chlamydia abortus, Chlamydia psittaci, Chlamydia suis, and Chlamydia pecorum. Chlamydial infections trigger a series of inflammatory disease-related sequelae including arthritis, conjunctivitis, pneumonia, and ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2019, 10:113]

Cited: 2 times

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Psittacosis Outbreak among Workers at Chicken Slaughter Plants, Virginia and Georgia, USA, 2018.

Kelly A Shaw, Christine M Szablewski, Stephanie Kellner, Laura Kornegay, Patricia Bair, Skyler Brennan, Audrey Kunkes, Meredith Davis, Olivia L McGovern, Jonas Winchell, Miwako Kobayashi, Nancy Burton, Marie A de Perio, Julie Gabel, Cherie Drenzek, Julia Murphy, Caroline Holsinger, Laurie Forlano,

During August-October, 2018, an outbreak of severe respiratory illness was reported among poultry slaughter plant workers in Virginia and Georgia, USA. A multiorganizational team investigated the cause and extent of illness, determined that the illness was psittacosis, and evaluated and recommended controls for health hazards in the workplace to prevent ... Read more >>

Emerging Infect. Dis. (Emerging infectious diseases)
[2019, 25(11):2143-2145]

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Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction.

Olga M Sigalova, Andrei V Chaplin, Olga O Bochkareva, Pavel V Shelyakin, Vsevolod A Filaretov, Evgeny E Akkuratov, Valentina Burskaia, Mikhail S Gelfand,

BACKGROUND:Chlamydia are ancient intracellular pathogens with reduced, though strikingly conserved genome. Despite their parasitic lifestyle and isolated intracellular environment, these bacteria managed to avoid accumulation of deleterious mutations leading to subsequent genome degradation characteristic for many parasitic bacteria. RESULTS:We report pan-genomic analysis of sixteen species from genus Chlamydia including identification ... Read more >>

BMC Genomics (BMC genomics)
[2019, 20(1):710]

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