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Animals
Special Issues
Animal Chlamydioses
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Animal Chlamydioses

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Veterinary Clinical Studies".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 6415

Special Issue Editors

Prof. Dr. Antonietta Di Francesco

E-Mail Website
Guest Editor
Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell’Emilia, Bologna, Italy
Interests: bacteriology; zoonoses; one Health; chlamydiales; epidemiology; wildlife
Dr. Giulia Mescolini

E-Mail Website
Guest Editor
A.U.S.L. della Romagna - Via Don Eugenio Servadei, 3, 47122 Forlì, FC, Italy
Interests: Marek's disease; avian metapneumovirus; avian coronavirus; infectious bursal disease; avian viral respiratory and immunosuppressive diseases
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Chlamydiae are widely distributed throughout the world, causing various forms of disease in human hosts, companion animals, livestock, wildlife and exotic species. Recent years have seen the introduction of molecular techniques that expanded the host range of known chlamydial species, but also discovered new families and new species of bacteria in the order Chlamydiales.

Unlike diseases well known for decades, such as psittacosis/ornithosis, due to Chlamydia psittaci, the host range, the pathogenetic aspects or the zoonotic potential of the majority of recently identified chlamydial species remains largely unknown and needs more investigation.

Areas of interest: recent advances in genome analysis, epidemiology, pathogenesis, diagnostic tools, antimicrobial resistance, immune response in the host, preventive and therapeutic measures, and zoonotic potential of chlamydiae or Chlamydia-related bacteria of veterinary interest.

We invite you to share your recent findings through this Special Issue.

Prof. Dr. Antonietta Di Francesco
Dr. Giulia Mescolini
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Chlamydiales
  • Chlamydia
  • Chlamydia-related bacteria
  • chlamydiosis
  • animals
  • genome analysis
  • epidemiology
  • antimicrobial resistance
  • new diagnostic approaches
  • immune response in the host
  • preventive and therapeutic measures
  • zoonosis
  • One Health

Published Papers (3 papers)

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Research

9 pages, 817 KiB  
Article
Seroprevalence and Risk Factors of Chlamydia Infection in Cattle in Shanxi Province, North China
by Xiao-Jing Wu, Jin Gao, Qian Zhang, Chen-Xu Li, Wen-Bin Zheng, Qing Liu, Xing-Quan Zhu, Yu-Ping Lei and Wen-Wei Gao
Animals 2023, 13(2), 252; https://doi.org/10.3390/ani13020252 - 10 Jan 2023
Cited by 2 | Viewed by 1334
Abstract
The information on Chlamydia infection in cattle is limited in Shanxi Province, north China. This study aimed to investigate the seroprevalence and risk factors of Chlamydia and Chlamydia abortus infection in cattle in Shanxi Province. In November 2020, a large-scale investigation of Chlamydia [...] Read more.
The information on Chlamydia infection in cattle is limited in Shanxi Province, north China. This study aimed to investigate the seroprevalence and risk factors of Chlamydia and Chlamydia abortus infection in cattle in Shanxi Province. In November 2020, a large-scale investigation of Chlamydia seroprevalence was conducted on 981 cattle serum samples collected from 40 cattle farms in 11 cities of Shanxi Province. The seroprevalence of Chlamydia and C. abortus was examined by indirect hemagglutination assay (IHA) and enzyme-linked immunosorbent assay (ELISA), respectively. The seroprevalence of Chlamydia and C. abortus was 52.29% (513/981) and 2.96% (29/981), respectively, in cattle in Shanxi Province. Location was identified as a risk factor for Chlamydia and C. abortus infection (p < 0.05). Under different management patterns, the seroprevalence of Chlamydia and C. abortus in large-scale animal farming companies was higher than that in household animal farms and animal farming cooperatives, and only the seroprevalence of Chlamydia was significantly different in different management patterns (p < 0.01). The results showed that there was higher seroprevalence of Chlamydia in cattle in Shanxi Province, while C. abortus was not the dominant species. This study provided baseline information on Chlamydia infection in cattle in Shanxi Province, which constitutes valuable data for monitoring livestock health and preventing potential zoonoses. Full article
(This article belongs to the Special Issue Animal Chlamydioses)
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10 pages, 949 KiB  
Article
Occurrence of Chlamydiae in Corvids in Northeast Italy
by Rachid Aaziz, Karine Laroucau, Federica Gobbo, Daniela Salvatore, Christiane Schnee, Calogero Terregino, Caterina Lupini and Antonietta Di Francesco
Animals 2022, 12(10), 1226; https://doi.org/10.3390/ani12101226 - 10 May 2022
Cited by 3 | Viewed by 1686
Abstract
Chlamydiaceae occurrence has been largely evaluated in wildlife, showing that wild birds are efficient reservoirs for avian chlamydiosis. In this study, DNA extracted from cloacal swabs of 108 corvids from Northeast Italy was screened for Chlamydiaceae by 23S real-time (rt)PCR. The positive samples [...] Read more.
Chlamydiaceae occurrence has been largely evaluated in wildlife, showing that wild birds are efficient reservoirs for avian chlamydiosis. In this study, DNA extracted from cloacal swabs of 108 corvids from Northeast Italy was screened for Chlamydiaceae by 23S real-time (rt)PCR. The positive samples were characterised by specific rtPCRs for Chlamydia psittaci, Chlamydia abortus, Chlamydia gallinacea, Chlamydia avium, Chlamydia pecorum and Chlamydia suis. Cloacal shedding of Chlamydiaceae was detected in 12 out of 108 (11.1%, 5.9%–18.6% 95% CI) corvids sampled. Molecular characterisation at the species level was possible in 8/12 samples, showing C. psittaci positivity in only one sample from a hooded crow and C. abortus positivity in seven samples, two from Eurasian magpies and five from hooded crows. Genotyping of the C. psittaci-positive sample was undertaken via PCR/high-resolution melting, clustering it in group III_pigeon, corresponding to the B genotype based on former ompA analysis. For C. abortus genotyping, multilocus sequence typing was successfully performed on the two samples with high DNA load from Eurasian magpies, highlighting 100% identity with the recently reported Polish avian C. abortus genotype 1V strain 15-58d44. To confirm the intermediate characteristics between C. psittaci and C. abortus, both samples, as well as two samples from hooded crows, showed the chlamydial plasmid inherent in most C. psittaci and avian C. abortus, but not in ruminant C. abortus strains. The plasmid sequences were highly similar (≥99%) to those of the Polish avian C. abortus genotype 1V strain 15-58d44. To our knowledge, this is the first report of avian C. abortus strains in Italy, specifically genotype 1V, confirming that they are actively circulating in corvids in the Italian region tested. Full article
(This article belongs to the Special Issue Animal Chlamydioses)
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10 pages, 941 KiB  
Article
Detection of a Novel Chlamydia Species in Invasive Turtles
by Laura Bellinati, Stefano Pesaro, Federica Marcer, Patrizia Danesi, Alda Natale and Letizia Ceglie
Animals 2022, 12(6), 784; https://doi.org/10.3390/ani12060784 - 20 Mar 2022
Cited by 2 | Viewed by 2464
Abstract
Trachemys scripta is a turtle species native to Central America. Since the 1950s, pond sliders have been imported worldwide as companion animals, but have often ended up in foreign ecosystems with great ecological consequences. Moreover, both autochthonous and invasive species of turtles can [...] Read more.
Trachemys scripta is a turtle species native to Central America. Since the 1950s, pond sliders have been imported worldwide as companion animals, but have often ended up in foreign ecosystems with great ecological consequences. Moreover, both autochthonous and invasive species of turtles can be carriers of pathogens, including Chlamydiaceae. In the present study, pulmonary tissues collected from four Trachemys scripta were tested with a 23S-targeting real-time PCR (rPCR) specific for the Chlamydiaceae family. The turtles were hosted in a rescue center for wild exotic animals located in northeastern Italy, and were found dead after the hibernation period. Two out of four individuals resulted positive in rPCR for the presence of Chlamydiaceae. Further characterization of this positivity was performed by phylogenetic analysis of the 16S rRNA and outer membrane protein A genes. The phylogenetic tree showed that these chlamydial strains are identical to a novel Chlamydia reported in 2017 in Polish freshwater turtles, and closely related to Chlamydia pneumoniae and to other chlamydial strains found in reptiles. This first finding evidences the presence of this Chlamydia strain in Italian turtles, but further studies will be necessary to confirm the presence and the strain pathogenicity and to evaluate its prevalence in the local turtles’ population. Full article
(This article belongs to the Special Issue Animal Chlamydioses)
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