scholarly journals Exposure to Major Vector-Borne Diseases in Dogs Subjected to Different Preventative Regimens in Endemic Areas of Italy

Pathogens ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 507
Author(s):  
Mariasole Colombo ◽  
Simone Morelli ◽  
Giulia Simonato ◽  
Angela Di Cesare ◽  
Fabrizia Veronesi ◽  
...  

Vector-borne diseases (VBDs) are globally widespread arthropod-transmitted diseases with a significant impact on animal and human health. Many drivers have recently spurred the geographic spread of VBDs in dogs. This study has evaluated the exposure to most important VBDs in dogs under different preventative treatments in different regions of Italy, i.e., Veneto, Friuli Venezia-Giulia, Umbria, Giglio Island (Tuscany), Abruzzo and Latium. Serological analyses were performed to detect antibodies against Leishmania infantum, Babesia canis, Anaplasma phagocytophilum/Anaplasma platys, Ehrlichia canis/Ehrlichia ewingii, Borrelia burgdorferi, Rickettsia conorii and the circulating antigen of Dirofilaria immitis. Dogs were categorized according to the treatment schedule usually received, and the association between seropositivity and possible risk factors was statistically evaluated. Overall, 124/242 (51.2%) dogs tested positive for at least one pathogen, while 34 (14.0%) were exposed to two or more pathogens. The most detected seropositivity was against R. conorii, followed by Anaplasma spp., L. infantum, B. canis, and the other pathogens under study. Significant statistical associations were found according to geographical provenance, history of tick infestation, lifestyle and inadequate prophylactic treatments. Random/irregular treatments have been identified as a clear risk factor. These results show that adequate prophylactic treatment protocols are overlooked by dog owners, despite the availability of several effective products, with possible implications in veterinary medicine and on public health.

2018 ◽  
Vol 63 (2) ◽  
pp. 412-415 ◽  
Author(s):  
Jiawei Wang ◽  
Patrick Kelly ◽  
Jilei Zhang ◽  
Zhengsheng Shi ◽  
Chunlian Song ◽  
...  

AbstractDespite the fact vector-borne diseases (VBDs) have been increasingly reported in dogs worldwide, there are only limited reports on VBDs in dogs in China with most being based on molecular detection of active infections. To provide further data on the exposure of dogs in China to VBD agents, we used commercial immunochromatographic assays to test plasma from 637 apparently healthy indoor and breeding colony dogs from 21 veterinary clinics in 10 provinces in China and a commercial dog breeding facility for circulating antigen ofDirofilaria immitis, and for circulating antibodies againstEhrlichiaspp.,Anaplasmaspp., andBorrelia burgdorferi. Overall, we found only low levels of exposure toEhrlichiaspp. (4.7%; 30/637),Anaplasmaspp. (1.4%; 9/637),B.burgdorferi(0.9%; 6/637) andD.immitis(0.2%; 1/637) with most of the positive animals coming from the commercial breeding colony (26/103; 25.2%) where ectoparasites were most commonly noted. At least one vector-borne agent was found in dogs from 6 of the 10 provinces investigated. Our results confirm exposure of dogs from around China to a variety of VBDs, even indoor pets seldom observed to harbor ectoparasites.


Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4431 ◽  
Author(s):  
Valeria Blanda ◽  
Rosalia D’Agostino ◽  
Elisabetta Giudice ◽  
Kety Randazzo ◽  
Francesco La Russa ◽  
...  

Rickettsia species are an important cause of emerging infectious diseases in people and animals, and rickettsiosis is one of the oldest known vector-borne diseases. Laboratory diagnosis of Rickettsia is complex and time-consuming. This study was aimed at developing two quantitative real-time PCRs targeting ompB and ompA genes for the detection, respectively, of Rickettsia spp. and R. conorii DNA. Primers were designed following an analysis of Rickettsia gene sequences. The assays were optimized using SYBR Green and TaqMan methods and tested for sensitivity and specificity. This study allowed the development of powerful diagnostic methods, able to detect and quantify Rickettsia spp. DNA and differentiate R. conorii species.


2018 ◽  
Author(s):  
David Alonso ◽  
Andy Dobson ◽  
Mercedes Pascual

AbstractThe history of infectious disease modelling essentially begins with the papers by Ross on malaria [1–5]. These models assume that the dynamics of malaria can most simply be characterized by two equations that describe the prevalence of malaria in the human and mosquito hosts. This structure has formed the central core of models for malaria and most other vector-borne diseases for the last century with occasional additions acknowledging important aetiological details. We partially add to this tradition by describing a malaria model that provides for vital dynamics in the vector and the possibility of super-infection in the human host; reinfection of asymptomatic hosts before they have cleared a prior infection. These key features of malaria aetiology create the potential for break points in the prevalence of infected hosts, sudden transitions that seem to characterize malaria’s response to control in different locations. We show that this potential for critical transitions is a general and underappreciated feature of any model for vector borne diseases with incomplete immunity and asymptomatic patients, including the canonical Ross-McDonald model. Ignoring these details of the host’s immune response to infection can potentially lead to serious misunderstanding in the interpretation of malaria distribution patterns and the design of control schemes for other vector-borne diseases.


2018 ◽  
Author(s):  
Anastasia Diakou ◽  
Angela Di Cesare ◽  
Simone Morelli ◽  
Mariasole Colombo ◽  
Lenaig Halos ◽  
...  

AbstractThe present study investigated the presence of endo- and ecto-parasites, and vector-borne pathogens, in dogs from four islands of Greece. A total of 200 owned and sheltered dogs were examined with different microscopic, serological and molecular methods.Of the examined dogs, 130 (65%) were positive for one or more parasites and/or vector-borne pathogens. The most common zoonotic intestinal helminths recorded were Ancylostomatidae (12.5%) and Toxocara canis (3.5%). Ninety-three dogs (46.5%) seroreacted to Rickettsia conorii. Twenty-two (11%) of them were also PCR positive and 7 (3.5%) showed corpuscoles suggestive of Rickettsia spp. on the blood smears. Nineteen dogs (9.5%) were seropositive for Ehrlichia canis, three of them being also PCR positive. Dogs positive for Anaplasma phagocytophilum-Anaplasma platys (1%), Dirofilaria immitis (0.5%) and Babesia canis (0.5%) were also found. Fleas and ticks were recorded in 53 (26.5%) and 50 (25%) dogs and all specimens were identified as Ctenocephalides felis felis and Rhipicephalus sanguineus sensu latu. Binary multiple univariate Generalized Linear Models were used to investigate factors and clinical signs related to the recorded positivity, while the association of specific signs with the pathogens was evaluated using tests of independence. Knowledge of occurrence and impact of zoonotic parasites and vector-borne pathogens in dog populations is crucial to prevent the infection in animals and people, and to control the risk of spreading of these pathogens in endemic and non-endemic areas.Author summaryBoth owned and sheltered dogs can harbor a variety of intestinal and extra-intestinal endoparasites, as well as vector-borne pathogens and ectoparasites, of zoonotic concern. Dog shelters and stray dogs are present in several touristic areas of Greece, including Sporades and Cyclades islands, where tourists often bring their pets with them, likely travelling from non-endemic to endemic areas. The present study has been carried out with the aim to evaluate the occurrence of the aforementioned pathogens. Data obtained showed that they are present in canine populations of Greece, with possibilities of infection for travelling dogs, which can also contribute to the spreading of zoonotic vector-borne diseases, introducing new pathogens in previously non-endemic areas. For these reasons, a constant monitoring of the epidemiological situation, improving control measures and correct diagnostic approaches are of primary importance for the prevention of canine and human infections, decreasing the spreading of potentially deadly pathogens.


2010 ◽  
Vol 15 (10) ◽  
Author(s):  
P Reiter

The introduction and rapidly expanding range of Aedes albopictus in Europe is an iconic example of the growing risk of the globalisation of vectors and vector-borne diseases. The history of yellow fever and dengue in temperate regions confirms that transmission of both diseases could recur, particularly if Ae. aegypti, a more effective vector, were to be re-introduced. The article is a broad overview of the natural history and epidemiology of both diseases in the context of these risks.


1963 ◽  
Vol 02 (02) ◽  
pp. 58-65 ◽  
Author(s):  
A. J. Goldwyn

Examples from many sources indicate the necessity for better communication of information between the medical researcher and the medical practitijner. Non-conventional methods of information retrieval offer a means of achieving this goal. An example is the experience of the Center for Documentation and Communication Research, Western Reserve University, in conducting a pilot study for the Communicable Disease Center. The subject was disease vector control literature and literature on vector-borne diseases, zoonoses and mycoses. A total of 2445 documents were analyzed by means of the telegraphic abstract, a structured and controlled “deep” index. The terms of the abstract were encoded by means of the semantic code, a machine-searchable code which establishes and preserves a thesaural function in order to control the terminology. Encoded abstracts recorded on magnetic tape were searched, using the GE 225 computer, for answers to 77 questions. Previously identified documents were retrieved with an accuracy of 94.7 o/o. Future tasks include continued study of the nature of the literature and its volume, and of present and potential users and of their needs.


2021 ◽  
Author(s):  
Erika Santamaria ◽  
Marco Súarez ◽  
Ricardo Ortiz Gallego ◽  
Patricia Fuya ◽  
Geraldine Páez ◽  
...  

The collection of insects of medical importance from the National Institute of Health (Colombia) INS, was started in 1934 with the aim of being an institutional and national repository of the biodiversity of insects involved in vector-borne diseases of importance in public health. Today, the entomological collection includes more than 7.500 specimens. The ceratopogonids insects are one of the Groups of Diptera that conform this collection. Within the Ceratopogonidae family, are the insects of the genera Culicoides which are relevant in public health because of the nuisance caused by their bites when they are presented in great abundance and because of their role as transmitters of several agents (virus, protozoa and nematodes) that causes diseases to the humans and to the animals (Mullen 2002, Kettle 1995). Brief of the Ceratopogonidae insects (Diptera: Ceratopogonidae) found in the collection, is presented here. A total of 801 individuals of this family rest in the collection, mainly adult of the genus Culicoides (90%). The collection is the result of the effort of several researchers through the history of the Group of Entomology (INS). These researchers collected ceratopogonids when they went to different transmission scenarios of the vector-borne diseases in Colombia, with the purpose of making the entomological characterizations. The effort of the researchers also included the processing, assembly, and identification of the specimens in the laboratory. New information about the geographical distribution of 39 species of the genera Culicoides appears for Colombia.


2019 ◽  
Vol 53 (4) ◽  
Author(s):  
Pilarita T. Rivera, MD, PhD

The epidemiology of vector mosquito-borne diseases such as malaria and dengue defines the interface between mosquito to human, and that between human to mosquito, as well as multiple economic, social, cultural, political and behavioral factors that expose humans to the mosquito bite, resulting in infection. Environmental factors such as suitable mosquito breeding sites, tropical climate and topography, increase mosquito density and man biting behavior resulting in infection and transmission. Different interventions to kill vector mosquitoes (adulticides and larvicides), prevent the mosquito bite (insecticide treated nets, curtains, repellents), diagnosis (rapid tests) and treatment (ACTs for malaria), have been implemented, and have been shown to reduce morbidity and mortality particularly for malaria. But can disease control be realized and sustained? Can disease elimination and prevention of re-introduction be achieved? A better understanding of the epidemiology and control of vector-borne diseases clearly shows that the responsibility is not with key affected populations and the health sector only, but with all those sectors and stakeholders that impact on the disease, be it at the local and national levels. This is the basis of creating and implementing intersectoral collaborations (ISCs) for vector-borne diseases. The article was able to draw together and analyzed multi-country experiences on ISCs for malaria and dengue. The ISC structure, goals, inputs and outputs as well as outcomes of existing models were described. Gaps in planning and implementation were noted, and recommendations were added. The resulting data can be used to develop an enhanced ISC framework for more effective implementation and success. The Philippines had quite a number of malaria control initiatives built on partnerships with bilateral agencies- USAID, USNAMRU, WHO, JICA, AusAID, NGOs, private corporations, religious organizations, military, and that have contributed in disease control.1 Notable are the Palawan and Agusan del Sur experiences. In 1999, the Palawan provincial government and Pilipinas Shell Foundation, as its corporate social responsibility, established Kilusan Ligtas Malaria to control malaria in the island.2,3 The program’s multi-sectoral and social mobilization strategies that have been adopted by Global Fund have resulted in impressive decline of malaria cases and deaths, even to this time. High social capital may ensure the sustainability of these strategies.4,5 In 1995, Agusan del Sur, another malarious province, implemented the project “Implementation and Evaluation of a Self-Sustaining Community-Based Malaria Control Program in the Philippines” through the Australian International Development and Assistance Bureau. Initially a collaborative project of RITM and DOH-Malaria Control Services, it was gradually devolved to the Province of Agusan del Sur, which created its Provincial Technical Advisory Committee, Provincial Management Team and Community Trust Fund to implement and sustain malaria control.6 Last year, Agusan del Sur was declared malaria-free. How to be successful may not be elusive and enhanced Intersectoral Collaborations may be the winning formula in the fight against malaria and other vector-borne diseases.REFERENCES 1. Tongol-Rivera P. Milestones in the history of malaria research and control in the Philippines. In: Kano S, Tongol-Rivera P, eds. Malaria in Asia. Asian Parasitology Series Monograph The Federation of Asian Parasitologists. 2005; 6:135-166. 2. Angluben RU, Trudeau MR, Kano S, Tongol-Rivera P. Kilusan Ligtas Malaria: Advancing Social Mobilization towards Sustainable Malaria Control in the province of Palawan, the Philippines. Trop Med Health. 2008; 36(1):45-9. 3. Matsumoto-Takahashi ELA, Tongol-Rivera P, Villacorte EA, Angluben RU, Jimba M, Kano S. Bottom-up approach to strengthen community-based malaria control strategy from community health workers’ perceptions of their past, present, and future: a qualitative study in Palawan, Philippines. 2018. Trop Med Health. 2018; 46(1):24. 4. Tongol-Rivera P, Kano S, Saniel O, Solon JA, Villacorte E. Social Capital and Malaria Control in Palawan, the Philippines. 2010 (unpublished). 5. Valdecanas OC, Tuazon RR, Barcelona DR. Understanding Social Mobilization. In: The Philippine Experience, How Social Mobilization Works. UNICEF, the Philippines. 1996; pp. 9-19. 6. Linao RT. Finding and Funding Means: Beyond the Elimination of Malaria in Agusan del Sur. Foundation for the Development of Agusanons, Inc. 2014. Pilarita T. Rivera, MD, PhD Associate Editor Department of Parasitology College of Public Health University of the Philippines Manila REFERENCES 1. Tongol-Rivera P. Milestones in the history of malaria research and control in the Philippines. In: Kano S, Tongol-Rivera P, eds. Malaria in Asia. Asian Parasitology Series Monograph The Federation of Asian Parasitologists. 2005; 6:135-166.2. Angluben RU, Trudeau MR, Kano S, Tongol-Rivera P. Kilusan Ligtas Malaria: Advancing Social Mobilization towards Sustainable Malaria Control in the province of Palawan, the Philippines. Trop Med Health. 2008; 36(1):45-9.3. Matsumoto-Takahashi ELA, Tongol-Rivera P, Villacorte EA, Angluben RU, Jimba M, Kano S. Bottom-up approach to strengthen community-based malaria control strategy from community health workers’ perceptions of their past, present, and future: a qualitative study in Palawan, Philippines. 2018. Trop Med Health. 2018; 46(1):24.4. Tongol-Rivera P, Kano S, Saniel O, Solon JA, Villacorte E. Social Capital and Malaria Control in Palawan, the Philippines. 2010 (unpublished).5. Valdecanas OC, Tuazon RR, Barcelona DR. Understanding Social Mobilization. In: The Philippine Experience, How Social Mobilization Works. UNICEF, the Philippines. 1996; pp. 9-19. 6. Linao RT. Finding and Funding Means: Beyond the Elimination of Malaria in Agusan del Sur. Foundation for the Development of Agusanons, Inc. 2014.


Parasitology ◽  
2006 ◽  
Vol 132 (1) ◽  
pp. 153-153
Author(s):  
HILARY HURD

Vector biology has become a fast moving field. Spurred on by the recent exciting advances in the molecular biology, genomics and latterly proteomics of vector insects and their pathogens, researchers are using new approaches and our knowledge is rapidly increasing. The second edition of this volume very much reflects these advances. The editor, William Marquardt, has assembled a team of section editors to oversee the production of 57 short chapters, divided into 7 parts. With a few exceptions, these experts are drawn from the USA, a reflection no doubt of the history of the first edition which was produced to accompany the Biology of Vector Disease course, given at Colorado State University. The text is aimed at post-graduate and post-doctoral researchers, working in a range of areas associated with vector biology and vector-borne diseases. It provides an excellent opportunity to obtain an initial overview of a new area or to dip into a field that may be peripheral to the topic under investigation.


Pathogens ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1200
Author(s):  
Simone Morelli ◽  
Francesca Gori ◽  
Mariasole Colombo ◽  
Donato Traversa ◽  
Giulia Sarrocco ◽  
...  

Several drivers have recently fostered the expansion of Angiostrongylus vasorum throughout Europe, where Vector-Borne Pathogens (VBPs) are also spreading. However, the level of simultaneous risk of infection is still unknown in canine populations. This study evaluated the simultaneous exposure to A. vasorum and major canine VBPs in dogs of Italy. Sera of 294 dogs were subjected to two ELISAs, detecting A. vasorum circulating antigens and antibodies against the parasite, and to the following assays: (i) SNAP® 4DX (IDEXX Laboratories Inc.) detecting Dirofilaria immitis antigens, and antibodies vs. Borrelia burgdorferi, Anaplasma spp. and Ehrlichia spp. and (ii) IFAT for the detection of antibodies vs. Leishmania infantum, Babesia canis and Rickettsia conorii. Twenty-two (7.5%, CI: 4.8–11.1%) and six (2%, CI: 0.7–4.4%) dogs scored positive for circulating A. vasorum antibodies and antigens, respectively. Seventeen dogs (5.8%, CI: 3.4–9.1%) were positive for A. vasorum antibodies + at least one VBP, three (1%, CI: 0.2–3%) for A. vasorum antigen + at least one VBP, while one dog (0.3%, CI: 0.01–1.88%) was positive for A. vasorum antigen + A. vasorum antibodies + B. canis antibodies. These results show that dogs living in different regions of Italy are at risk of simultaneous infections with both A. vasorum and VBPs. Despite the same scenario being likely in other countries of Europe, the current knowledge is scant. Therefore, further studies are warranted to amplify current epizootiological information and to understand whether control programs should be improved.


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