Emerging Infectious Diseases of Wildlife: A Threat for Biodiversity and Global Health

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

Deadline for manuscript submissions: 31 December 2024 | Viewed by 7782

Special Issue Editors


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Guest Editor
Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Sassari, Italy
Interests: microbiology; infectious diseases; immunology; biomarker discovery; vaccines; diagnostic tools

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Guest Editor
Istituto Zooprofilattico Sperimentale della Sardegna, Sassari, Italy
Interests: Virology; infectious diseases; immunology; genetics

E-Mail Website
Guest Editor
Dipartimento di Medicina Veterinaria, Università degli Studi di Sassari, Sassari, Italy
Interests: microbiology; infectious diseases; immunology; phylogenetics; wildlife

Special Issue Information

Dear Colleagues,

Despite their impact on global health, knowledge regarding wildlife infectious diseases is still fragmentary and underestimated. Sanitary surveillance represents a key factor in the conservation and management of both wildlife and ecosystems; furthermore, identifying and monitoring wildlife infectious agents has important implications for human and domestic animals’ health. Indeed, the WHO estimates that 60–80% of human emerging infectious diseases have an animal origin, and 70% of them originate from wildlife. Notably, in the last century, spillovers of infectious agents from wildlife reservoirs increased mainly due to the interaction of wild animals with livestock and humans (e.g., due to urbanization, habitat encroachment, and human behaviors).

This Special Issue aims to provide innovative insights into the emerging infections of wild animals; we also consider their potential impact on global health. Manuscripts focusing on the epidemiology of emerging infectious diseases in wild animals, the identification and characterization of new microbial species in wildlife, pathogenic mechanisms, host immune response, and evaluations of the impact on global health, are welcomed.

Authors are encouraged to present original research, but high-quality reviews will also be considered.

Dr. Carla Cacciotto
Dr. Elisabetta Coradduzza
Dr. Alberto Alberti
Guest Editors

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Keywords

  • emerging infectious disease
  • wildlife
  • One Health

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Published Papers (6 papers)

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Research

17 pages, 1648 KiB  
Article
Canine Distemper Virus in Sardinia, Italy: Detection and Phylogenetic Analysis in Foxes
by Elisabetta Coradduzza, Fiori Mariangela Stefania, Davide Pintus, Luca Ferretti, Alice Ledda, Gian Simone Chessa, Angela Maria Rocchigiani, Giada Lostia, Renata Rossi, Maria Giovanna Cancedda, Simona Macciocu, Marcella Cherchi, Daniele Denurra, Antonio Pintore, Roberto Bechere, Flavia Pudda, Marco Muzzeddu, Maria Antonietta Dettori, Angelo Ruiu, Paolo Briguglio, Ciriaco Ligios and Giantonella Puggioniadd Show full author list remove Hide full author list
Animals 2024, 14(21), 3134; https://doi.org/10.3390/ani14213134 - 31 Oct 2024
Abstract
Canine distemper is a contagious infectious disease caused by the canine distemper virus (CDV). The disease affects carnivores and is present in different geographical areas. This work aimed to characterize CDV strains infecting foxes in Sardinia (Italy) from 2014 to 2023, through clinical, [...] Read more.
Canine distemper is a contagious infectious disease caused by the canine distemper virus (CDV). The disease affects carnivores and is present in different geographical areas. This work aimed to characterize CDV strains infecting foxes in Sardinia (Italy) from 2014 to 2023, through clinical, anatomic–histopathological, and phylogenetic analysis. Neurological, respiratory, and gastrointestinal clinical signs, including fever, depression, ocular and nasal muco-purulent discharge, and diarrhea, were reported. Necropsy and histopathological examination revealed interstitial pneumonia and mild, diffuse, non-purulent meningoencephalitis with multifocal, moderate to severe demyelination, respectively. Immunohistochemical analysis detected specific CDV positivity in lung and brain sections. For the phylogenetic analyses, a dataset with the sequences of the gene coding for the hemagglutinin (H gene) obtained from fox strains was set up, including a canine strain sequence to assess possible differences. The genetic sequences of the fox strains clustered within an exclusively Sardinian clade. This clade is a sister clade of sequences recently analyzed from central Italy, with a mean genetic divergence of more than 5%. Together, these clades form a sister clade of the Central Europe-Wildlife lineage, with a mean genetic divergence of more than 5% between these clades and the Central European lineage. Sardinian sequences belong to a newly proposed “Sardinia-Wildlife” lineage of CDV. The circulation of this lineage in the investigated foxes and dogs suggests the transmission of the virus between wild and domestic animals. Central Italian viruses may also constitute a new separate CDV lineage. Full article
17 pages, 4586 KiB  
Article
Ticks and Tick-Borne Pathogens: Occurrence and Host Associations over Four Years of Wildlife Surveillance in the Liguria Region (Northwest Italy)
by Lisa Guardone, Chiara Nogarol, Annalisa Accorsi, Nicoletta Vitale, Valeria Listorti, Sonia Scala, Sonia Brusadore, Ilaria Nina Miceli, Lara Wolfsgruber, Annalisa Guercio, Santina Di Bella, Francesca Grippi, Elisabetta Razzuoli and Maria Lucia Mandola
Animals 2024, 14(16), 2377; https://doi.org/10.3390/ani14162377 - 16 Aug 2024
Viewed by 859
Abstract
Tick-borne diseases (TBDs) are a considerable public health problem worldwide. The occurrence of Anaplasma spp., Borrelia burgdorferi s.l., Coxiella burnetii, Rickettsia spp., and tick-borne encephalitis virus (TBEv) was investigated via PCR and sequencing in 683 ticks collected from 105 roe deer, 61 [...] Read more.
Tick-borne diseases (TBDs) are a considerable public health problem worldwide. The occurrence of Anaplasma spp., Borrelia burgdorferi s.l., Coxiella burnetii, Rickettsia spp., and tick-borne encephalitis virus (TBEv) was investigated via PCR and sequencing in 683 ticks collected from 105 roe deer, 61 wild boars, 49 fallow deer, and 2 chamois, in the Liguria region, northwest Italy, between 2019 and 2022. The ticks were morphologically identified. Four different tick species were found: Ixodes ricinus (66.8% of the collected ticks), Dermacentor marginatus (15.8%), Rhipicephalus sanguineus s.s. (15.7%), and Haemaphysalis punctata (0.9%). Six ticks (0.9%) were only identified as Rhipicephalus spp. Of the 222 pools analyzed, 27.9% were positive. Most pools (n = 58, 26.1% of pools analyzed) were positive for Rickettsia spp., and several species were found: Rickettsia slovaca was the dominant species (15.3%), followed by R. monacensis (8.1%), while R. helvetica (1.8%), R. massiliae (0.5%), and R. raoultii (0.5%) were found only sporadically. Anaplasma phagocytophilum was identified in three pools and B. burgdorferi s.l. in one pool. All samples were negative for C. burnetii and TBEv. Significant associations were found between I. ricinus and roe deer, D. marginatus and wild boar, and between R. monacensis and I. ricinus. The prevalence of Rickettsia spp. differed significantly between tick and host species. This updated picture of tick species and TBPs in wild ungulates in Liguria, where the population of these animals is increasing, shows a widespread presence of potentially zoonotic Rickettsia spp. Continuous monitoring and public information on preventive measures are needed. Full article
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15 pages, 8651 KiB  
Article
Molecular and Serological Surveillance for Mycobacterium leprae and Mycobacterium lepromatosis in Wild Red Squirrels (Sciurus vulgaris) from Scotland and Northern England
by Zijie Zhou, Anouk van Hooij, Gaby N. Wassenaar, Emma Seed, Els M. Verhard-Seymonsbergen, Paul L. A. M. Corstjens, Anna L. Meredith, Liam A. Wilson, Elspeth M. Milne, Katie M. Beckmann and Annemieke Geluk
Animals 2024, 14(13), 2005; https://doi.org/10.3390/ani14132005 - 7 Jul 2024
Viewed by 1101
Abstract
Leprosy is a poverty-associated infectious disease in humans caused by Mycobacterium leprae or M. lepromatosis, often resulting in skin and peripheral nerve damage, which remains a significant public health concern in isolated areas of low- and middle-income countries. Previous studies reported leprosy [...] Read more.
Leprosy is a poverty-associated infectious disease in humans caused by Mycobacterium leprae or M. lepromatosis, often resulting in skin and peripheral nerve damage, which remains a significant public health concern in isolated areas of low- and middle-income countries. Previous studies reported leprosy in red squirrels in the British Isles, despite the fact that autochthonous human cases have been absent for centuries in this region. To investigate the extent of M. leprae and M. lepromatosis presence in wild red squirrels in the northern UK, we analyzed 220 blood/body cavity fluid samples from opportunistically sampled red squirrels (2004–2023) for specific antibodies against phenolic glycolipid-I, a cell wall component specific for these leprosy bacilli. Additionally, we assessed bacillus-derived DNA by real-time PCR (qPCR) in 250 pinnae from the same cohort. M. lepromatosis and M. leprae DNA were detected by qPCR in 20.4% and 0.8% of the squirrels, respectively. No cases of co-detection were observed. Detectable levels of anti-PGL-I antibodies by UCP-LFA were observed in 52.9% of animals with the presence of M. lepromatosis determined by qPCR, and overall in 15.5% of all animals. In total, 22.6% (n = 296) of this UK cohort had at least some exposure to leprosy bacilli. Our study shows that leprosy bacilli persist in red squirrels in the northern UK, emphasizing the necessity for ongoing molecular and serological monitoring to study leprosy ecology in red squirrels, gain insight into potential zoonotic transmission, and to determine whether the disease has a conservation impact on this endangered species. Full article
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15 pages, 2418 KiB  
Article
Molecular Prevalence, Genetic Diversity, and Tissue Tropism of Bartonella Species in Small Mammals from Yunnan Province, China
by Pei-Yu Han, Fen-Hui Xu, Jia-Wei Tian, Jun-Ying Zhao, Ze Yang, Wei Kong, Bo Wang, Li-Jun Guo and Yun-Zhi Zhang
Animals 2024, 14(9), 1320; https://doi.org/10.3390/ani14091320 - 28 Apr 2024
Cited by 1 | Viewed by 1159
Abstract
Bartonella is an intracellular parasitic zoonotic pathogen that can infect animals and cause a variety of human diseases. This study investigates Bartonella prevalence in small mammals in Yunnan Province, China, focusing on tissue tropism. A total of 333 small mammals were sampled from [...] Read more.
Bartonella is an intracellular parasitic zoonotic pathogen that can infect animals and cause a variety of human diseases. This study investigates Bartonella prevalence in small mammals in Yunnan Province, China, focusing on tissue tropism. A total of 333 small mammals were sampled from thirteen species, three orders, four families, and four genera in Heqing and Gongshan Counties. Conventional PCR and real-time quantitative PCR (qPCR) were utilized for detection and quantification, followed by bioinformatic analysis of obtained DNA sequences. Results show a 31.5% detection rate, varying across species. Notably, Apodemus chevrieri, Eothenomys eleusis, Niviventer fulvescens, Rattus tanezumi, Episoriculus leucops, Anourosorex squamipes, and Ochotona Thibetana exhibited infection rates of 44.4%, 27.7%, 100.0%, 6.3%, 60.0%, 23.5%, and 22.2%, respectively. Genetic analysis identified thirty, ten, and five strains based on ssrA, rpoB, and gltA genes, with nucleotide identities ranging from 92.1% to 100.0%. Bartonella strains were assigned to B. grahamii, B. rochalimae, B. sendai, B. koshimizu, B. phoceensis, B. taylorii, and a new species identified in Episoriculus leucops (GS136). Analysis of the different tissues naturally infected by Bartonella species revealed varied copy numbers across different tissues, with the highest load in spleen tissue. These findings underscore Bartonella’s diverse species and host range in Yunnan Province, highlighting the presence of extensive tissue tropism in Bartonella species naturally infecting small mammalian tissues. Full article
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9 pages, 535 KiB  
Communication
Seroconversion in Galapagos Sea Lions (Zalophus wollebaeki) Confirms the Presence of Canine Distemper Virus in Rookeries of San Cristóbal Island
by Julian Ruiz-Saenz, Veronica Barragan, Colón Jaime Grijalva-Rosero, Eduardo A. Diaz and Diego Páez-Rosas
Animals 2023, 13(23), 3657; https://doi.org/10.3390/ani13233657 - 26 Nov 2023
Viewed by 2015
Abstract
Background: The emblematic Galapagos sea lion (GSL—Zalophus wollebaeki) has faced an important population decline over the last four decades. There are multiple environmental and biological factors that might be implied in this decrease. Recently, evidence of various zoonotic infectious diseases that [...] Read more.
Background: The emblematic Galapagos sea lion (GSL—Zalophus wollebaeki) has faced an important population decline over the last four decades. There are multiple environmental and biological factors that might be implied in this decrease. Recently, evidence of various zoonotic infectious diseases that can be potential threats has been reported. Considering that in some islands of the archipelago the risk of transmission of infectious diseases may be promoted by the increasing population of domestic dogs, epidemiological vigilance and search of new pathogens are essential. The canine distemper virus (CDV), one of the viral pathogens that generate the most concern for the agencies responsible for the management and conservation of the Galapagos pinnipeds, was detected in the GSL in 2010. However, there is scarce information about its impact on GSL health and about its epidemiology. Methods: In this study, 110 GSL serum samples were collected during the summer of 2016 and 2017. All samples were exposed to VERO dog SLAM cells expressing the canine SLAM receptor. Results: Our results showed a significative increase (p = 0.04) in the frequency of neutralizing antibodies to CDV in the 2017 (53.1%) samples compared to the 2016 samples (19.6%). Conclusions: Our work confirmed the continuous and increasing circulation of the CDV in the GSL and highlights the importance of monitoring emerging diseases that can be transmitted from domestic to wildlife species. Vigilance of CDV is essential to understand the role of this virus in GSL mortality and to take informed decisions for wildlife conservation. Full article
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13 pages, 1376 KiB  
Article
Isolation and Molecular Characterisation of Respirovirus 3 in Wild Boar
by Enrica Sozzi, Davide Lelli, Ilaria Barbieri, Chiara Chiapponi, Ana Moreno, Tiziana Trogu, Giovanni Tosi and Antonio Lavazza
Animals 2023, 13(11), 1815; https://doi.org/10.3390/ani13111815 - 30 May 2023
Cited by 1 | Viewed by 1477
Abstract
Paramyxoviruses are important pathogens affecting various animals, including humans. In this study, we identified a paramyxovirus in 2004 (180608_2004), isolated from a sample of the femoral marrow bone of a wild boar carcass imported from Australia. Antigenic and morphological characteristics indicated that this [...] Read more.
Paramyxoviruses are important pathogens affecting various animals, including humans. In this study, we identified a paramyxovirus in 2004 (180608_2004), isolated from a sample of the femoral marrow bone of a wild boar carcass imported from Australia. Antigenic and morphological characteristics indicated that this virus was similar to members of the family Paramyxoviridae. The complete genome phylogenetic analysis grouped this virus into genotype A of bovine parainfluenza virus type 3 (BPIV-3), recently renamed bovine respirovirus type 3 (BRV3), which also includes two swine paramyxoviruses (SPMV)—Texas-81 and ISU-92—isolated from encephalitic pigs in the United States in 1982 and 1992, respectively. The wild boar 180608_2004 strain was more closely related to both the BRV3 shipping fever (SF) strain and the SPMV Texas-81 strain at the nucleotide and amino acid levels than the SPMV ISU-92 strain. The high sequence identity to BRV3 suggested that this virus can be transferred from cattle to wild boars. The potential for cross-species transmission in the Respirovirus genus makes it essential for intensified genomic surveillance. Full article
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