Demographic inference from the mt-DNA COI gene and wing geometry of Culex gelidus (Diptera: Culicidae), an important vector of Japanese encephalitis in Thailand.

Culex gelidus (Diptera: Culicidae), an important vector of the Japanese encephalitis virus (JEV), contributes to human viral encephalitis in many Asian countries, including Thailand. This study represents the first investigation of the demographic patterns of Cx. gelidus populations in Thailand using cytochrome c oxidase subunit I (COI) gene analysis and wing geometric morphometrics (GM). Mosquitoes were collected from 10 provinces across six regions of Thailand in 2022. Analysis of the COI sequences (n = 182) indicated high haplotype diversity (0.882) and low nucleotide diversity (0.006), with 72 haplotypes identified. The haplotype network demonstrated no profound splits among the geographic populations. Neutral tests, including Tajima's D and Fu's Fs, displayed negative values, with a significant result observed for Fu's Fs (-33.048, p < 0.05). The mismatch distribution analysis indicated that the population does not statistically deviate from a model of sudden population expansion (SSD = 0.010, p > 0.05; Rg = 0.022, p > 0.05). The estimations suggest that the Cx. gelidus population in Thailand began its expansion approximately between 459,243 and 707,011 years ago. The Mantel test showed no significant relationship between genetic and geographic distances (r = 0.048, p > 0.05). Significant phenotypic differences (based on wing shape) were observed among most populations. Additionally, in this study, we found no significant relationships between phenotypic and genetic distances (r = 0.250, p > 0.05). Understanding the genetic and morphological dynamics of Cx. gelidus is vital for developing targeted surveillance and vector control measures. This knowledge will also help to predict how future environmental changes might affect these populations, thereby informing long-term vector management strategies.

Mosquito species identity matters: unraveling the complex interplay in vector-borne diseases.

BACKGROUND: Research on vector-borne diseases has traditionally centred on a limited number of vertebrate hosts and their associated pathogens, often neglecting the broader array of vectors within communities. Mosquitoes, with their vast species diversity, hold a central role in disease transmission, yet their capacity to transmit specific pathogens varies considerably among species. Quantitative modelling of mosquito-borne diseases is essential for understanding transmission dynamics and requires the necessity of incorporating the identity of vector species into these models. Consequently, understanding the role of different species of mosquitoes in modelling vector-borne diseases is crucial for comprehending pathogen amplification and spill-over into humans. This comprehensive overview highlights the importance of considering mosquito identity and emphasises the essential need for targeted research efforts to gain a complete understanding of vector-pathogen specificity. METHODS: Leveraging the recently published book, 'Mosquitoes of the World', I identified 19 target mosquito species in Europe, highlighting the diverse transmission patterns exhibited by different vector species and the presence of 135 medically important pathogens. RESULTS: The review delves into the complexities of vector-pathogen interactions, with a focus on specialist and generalist strategies. Furthermore, I discuss the importance of using appropriate diversity indices and the challenges associated with the identification of correct indices. CONCLUSIONS: Given that the diversity and relative abundance of key species within a community significantly impact disease risk, comprehending the implications of mosquito diversity in pathogen transmission at a fine scale is crucial for advancing the management and surveillance of mosquito-borne diseases.

The Biodiversity of Blackflies (Diptera: Simuliidae) in Brazil: New Distribution Records and Updated Checklist.

Currently, according to the most recent Simuliidae World Inventory, there are 97 valid species of blackflies recorded in Brazil, some of which act as vectors for zoonoses such as human onchocerciasis and mansonellosis in the northern and central-western regions of the country. Meanwhile, other species can cause serious socioeconomic problems due to the nuisance of female bites. Therefore, accurate knowledge of their distribution is crucial for the development and implementation of successful preventive strategies. With this aim, this study reviewed and updated the geographical distribution of the blackfly fauna throughout the Brazilian states. The data were compiled from three main sources: geographic information of material deposited at the Simuliidae Collection of the Instituto Oswaldo Cruz (CSIOC-IOC), a comprehensive review of scientific literature, and online biodiversity databases. We present a total of 71 new distribution records of 38 different Simuliidae species for 24 Brazilian states. Neither of these sets of records has been included in the Simuliidae World Inventory. Consequently, an updated Brazilian Simuliidae checklist, comprising a total of 98 valid species, is presented, highlighting these new distribution records. We also discuss six dubious records for the country and the implications of this updated data for the Simuliidae species richness of Brazil, its states, and biomes. This information is essential for future studies in the taxonomy, systematics, and biogeography of this family in Brazil.

Diversity response of necrophagous dipteran communities and their functional groups to an anthropization gradient.

The anthropization process exerts a profound effect on ecosystems, causing alterations in biodiversity, habitat structure, and species composition, ultimately disrupting the delicate balance of natural environments. The aim of the present study was to explore the ecological dynamics of necrophagous Sarcophagidae and Calliphoridae flies along an anthropization gradient. This research investigated alpha and beta diversity patterns to unravel the impact of human-induced environmental changes on these insect communities and also assesses the dynamics of functional groups in relation to their impact on medical and forensic fields. Five distinct habitats, ranging from urban to forested areas, were surveyed in two Departments in the Province of Chaco, Argentina. Necrophagous flies were collected using van Someren-Rydon canopy traps across three seasons. Two main functional groups were analyzed: oviparous flies (Calliphoridae) and larviparous flies (Sarcophagidae). Results indicated a significant negative correlation between Sarcophagidae species richness and anthropization, whereas Calliphoridae showed increased abundance in highly anthropized sites. The combined assemblage of Calliphoridae+Sarcophagidae exhibited significant relationships across all community parameters evaluated. Beta diversity analysis revealed turnover as the main process shaping dipteran communities along the anthropization gradient, with spatial species replacement dominating. This underscores the importance of interspecific spatial segregation in dipteran community composition. In conclusion, this study enhances our understanding of the ecological adaptations of necrophagous dipterans to anthropogenic disturbances. The observed shifts in diversity and abundance have implications for forensic investigations and public health, emphasizing the need for nuanced monitoring and conservation strategies. This research contributes valuable insights into the intricate ecological interactions of these insect communities within changing ecosystems.

A Case of Myiasis Caused by Cordylobia anthropophaga (Diptera: Calliphoridae) in an Italian Traveler Returning from Senegal.

PURPOSE: Myiases are infestations of human and animal tissues by fly larvae. These conditions are widespread in tropical countries and travelers in those areas are at risk of becoming infested. Although Cordylobia anthropophaga (Blanchard & Berenger-Feraud, 1872) is one of the most common myiasis-causing species, few high-quality images and molecular sequences are available for this fly. We present a case of C. anthropophaga infestation in an Italian patient returning from Senegal, with the aim of increasing both visual and molecular data for this species. METHODS: After removal, the larva was determined following standardized morphological keys and photographed under a digital microscope. Molecular characterization of the Cytochrome c oxidase subunit I (COI) was performed using universal primers. RESULTS: The general appearance, the structural organization of the cephalic region, of the cephaloskeleton, and of the posterior tracheal spiracles suggested that the causative agent of the myiasis was a third instar larva of C. anthropophaga. The morphological data are further supported by the molecular data: the COI sequence showed high levels of identity with the already published verified COI sequences of C. anthropophaga. CONCLUSION: We provide high-quality morphological and molecular data useful for the identification of larvae of C. anthropophaga. We highlight that myiasis might be common in Senegal and better data about its prevalence in travelers and in the endemic countries are needed to understand the burden of this condition.

Joseph Needham's 'Motivations for Participation' and 'Major Roles' in the International Scientific Commission on Bacterial Warfare during the Korean War.

This paper analyzes the motivations of the British biochemist Joseph Needham for participating in 'the International Scientific Commission for the Investigation of the Facts Concerning Bacterial Warfare in Korea and China (ISC)' and his major roles within it during the Korean War. Needham stayed in China for four years starting in 1942 as a scientific counselor and director of the British Scientific Mission in China, which enabled him to interact with many Chinese scientists and politicians. Surprisingly, during this period (1944), Needham conducted an investigation into the Japanese military's use of bacterial warfare. Through his personal records, Needham repeatedly stated that his experience with bacterial warfare research in 1944 was one of the most important reasons for his participation in ISC activities. In addition, Needham secretly but very actively sought to recruit other investigators within Britain. Needham repeatedly tried to persuade fellow professors at Cambridge University, William Thorpe and Vincent Wigglesworth, to be included in the investigation team. Although Needham had doubts about his own expertise in investigative activities, he actively expressed his desire to become a member of the investigative team through various channels. Primary documents show that he actively and voluntarily led the investigation activities after joining the team in professional discussions, document analysis, and witness interrogations. Needham's passion and sincerity demonstrated in internal meeting minutes dispel some misunderstandings that the investigation team's activities were limited to passively approving Chinese data.

New records of Rhipicephalus linnaei infected by Rickettsia massiliae from Central Mexico.

BACKGROUND: On the American continent, Rhipicephalus sanguineus s.l. comprises two species: Rhipicephalus linnaei and R. sanguineus s.s. Each species has been identified as a potential vector of at least one of five species of pathogenic bacteria of the genus Rickettsia. In particular, Rickettsia massiliae is one of three species with the greatest importance in public health at the continental level. In Mexico, this species is reported exclusively in the Nearctic states of Baja California and Chihuahua. AIM: For this reason, the aim of this work was to provide new records of R. massiliae for the centre of the country derived from active acarological surveillance. MATERIALS AND METHODS: During the period of February-October 2019, 29 dogs from six municipalities in the state of Morelos were sampled. Hosts were visually inspected, and ticks were recovered and identified morphologically and molecularly by amplification of the 16S rDNA gene. Subsequently, five genes from members of the genus Rickettsia were amplified and sequenced. RESULTS: A total of 229 (117♀, 98♂ and 14 N) ticks identified as R. linnaei were recovered, two of which were positive for R. massiliae strains related to those recovered from Argentina and the United States. CONCLUSIONS: This work provides the second record of R. massiliae infecting R. linnaei in Mexico and the Americas, increasing the geographic distribution of this Rickettsia species in the Neotropical region, and providing information on the possible role of R. linnaei as a potential vector of this microorganism.

Transgenic approaches in medical entomology: 2022 highlights.

Transgenesis has emerged as a powerful tool to control arthropod vectors and the diseases they transmit. Here, we highlight the latest developments on transgenic approaches in ticks, Anopheles and Aedes mosquitoes, based on recent findings and significant papers from 2022. We survey topics ranging from population replacement, population suppression, gene drive, sex ratio distortion, public engagement and capacity building, and gene editing in ticks. While presenting these advancements, we discuss the current challenges surrounding the application of arthropod transgenesis for the development of novel vector control strategies.

Northeast Regional Center for Excellence in Vector-Borne Diseases' Master of Science training program: a curriculum to support future capacity in public health entomology.

A major lack of expertise in vector biology, surveillance, and control for public health professionals has been acknowledged over the past several decades, especially in light of the introduction of West Nile and Zika viruses to the United States. To address this growing need, the Northeast Regional Center for Excellence in Vector-Borne Diseases (NEVBD) designed a unique educational program to cross-train students in the fundamentals of vector biology and public health. Here, we summarize the formation, evaluation, and outcomes of NEVBD's Master of Science in Entomology: Vector-Borne Disease Biology program and provide details on core competencies to enable adoption and adaptation of the program to other institutions and contexts. A discussion of major barriers to filling the nation's need for public health personnel with medical entomology training, such as financial barriers and recruitment of underrepresented students, is presented. We conclude with considerations for administering these training programs.

Groundbreaking outpatient activity in medical entomology in France: An eight-year experience in a french university hospital.

INTRODUCTION: Arthropods are known to impair human health in various manners, acting as infectious disease vectors, or as simple nuisances. Even though considerable research is being produced in medical entomology, no reports on patient management in clinical entomology units are available in the literature. PATIENTS AND METHODS: We retrospectively surveyed all the records from patients having consulted in our outpatient clinical entomology unit in Nice University Hospital from 2012 to 2020. For each patient, physical examination findings and treatment data were analyzed. RESULTS: A total of 518 patients were analyzed in this study. Most were diagnosed with arthropod infestation (55.8%), the most common being Sarcoptes scabiei (35%), bedbugs (23%), Pyemotes dermatitis (17.6%) and flea infestation (15.9%). Along with symptomatic treatments, targeted environmental measures could be proposed for infested patients. For many of our patients, on the other hand, active infestation was ruled out. CONCLUSION: Given today's lack of expertise in medical entomology, we advocate for the creation of medical entomology units in university hospitals, not only allowing fair and proportionate multidisciplinary management of patients in whom arthropod infestation is suspected, but also generating cost savings.

A Deeper Insight into the Tick Salivary Protein Families under the Light of Alphafold2 and Dali: Introducing the TickSialoFam 2.0 Database.

Hard ticks feed for several days or weeks on their hosts and their saliva contains thousands of polypeptides belonging to dozens of families, as identified by salivary transcriptomes. Comparison of the coding sequences to protein databases helps to identify putative secreted proteins and their potential functions, directing and focusing future studies, usually done with recombinant proteins that are tested in different bioassays. However, many families of putative secreted peptides have a unique character, not providing significant matches to known sequences. The availability of the Alphafold2 program, which provides in silico predictions of the 3D polypeptide structure, coupled with the Dali program which uses the atomic coordinates of a structural model to search the Protein Data Bank (PDB) allows another layer of investigation to annotate and ascribe a functional role to proteins having so far being characterized as "unique". In this study, we analyzed the classification of tick salivary proteins under the light of the Alphafold2/Dali programs, detecting novel protein families and gaining new insights relating the structure and function of tick salivary proteins.

Acknowledging extraordinary women in the history of medical entomology.

Throughout history, women have been actively involved in the advancement of science, while struggling to overcome challenges to participate and a lack of recognition. Prior to 1950, most women were not included in the lists of "classical" descriptions of the iconic scientific figures nor included in the most relevant historical accounts. Since the second half of the twentieth century, great efforts have been made to recognize the contributions of women to the advancement of science, especially since formal scientific careers have been dominated by men, with limited (or no) access to women. Despite these challenging social, political and cultural contexts, many women have succeeded in making significant advancements, and their contributions are now being acknowledged. Such efforts have led to the publication of recent reviews and compilations on outstanding women in biological sciences. The field of medical entomology is inherently interdisciplinary, focusing on insects and other arthropods that affect human health, with input primarily from the biological and medical sciences and a strong public health perspective. Several reviews and book chapters describing the history of medical entomology have been published over the decades, but few women are mentioned in these publications, even though many women have contributed to this field. Much of the information on these women is currently scattered throughout the published literature and historical records on a wide range of topics, including activism, virology, vector control and even acarology. Considering that there is no single available compilation of women contributors in the history of medical entomology, this review aims to provide a list of 22 women and their contributions to this field. The list includes women from diverse backgrounds, born in the late 1800s and before 1950, who directly impacted medical entomology in various ways and in different regions of the world. This compilation is far from exhaustive, but it aims to identify role models and examples of extraordinary women to motivate the evolving future of this field.

Silent circulation of Zika and dengue virus in Aedes aegypti (Diptera: Culicidae) during a non-epidemic year in the state of Sergipe, northeastern Brazil.

BACKGROUND: Dengue virus (DENV) and Zika virus (ZIKV) have a severe impact on human health worldwide. To understand the dynamics of these viruses in mosquito populations, it is necessary to maintain surveillance during non-epidemic years. METHODS: We aimed to assess the presence of DENV and ZIKV in Aedes aegypti females in the state of Sergipe, northeastern Brazil, during a non-epidemic year. The Ae. aegypti females collected were sectioned, and the heads and thorax were used to analyze the infection rate. Each female was first analyzed to detect Flavivirus using RT-PCR. Flavivirus-positive samples were further screened to detect ZIKV and DENV types 1, 2, 3 and 4. RESULTS: A total of 184 females were collected. ZIKV was identified in 5.4% of the sample and DENV in 7.1%, with the DENV-positive samples belonging to subtypes 2, 3 and 4. The presence of coinfected vectors was also observed. Of the four cities tested, only one was negative for all viruses. CONCLUSIONS: These results show that the maintenance of vigilance during non-epidemic years can provide data on viruses circulating before the onset of outbreaks. This can enable the planning and implementation of local control measures to prevent the appearance of new outbreaks.

A Computer Vision-Based Approach for Tick Identification Using Deep Learning Models.

A wide range of pathogens, such as bacteria, viruses, and parasites can be transmitted by ticks and can cause diseases, such as Lyme disease, anaplasmosis, or Rocky Mountain spotted fever. Landscape and climate changes are driving the geographic range expansion of important tick species. The morphological identification of ticks is critical for the assessment of disease risk; however, this process is time-consuming, costly, and requires qualified taxonomic specialists. To address this issue, we constructed a tick identification tool that can differentiate the most encountered human-biting ticks, Amblyomma americanum, Dermacentor variabilis, and Ixodes scapularis, by implementing artificial intelligence methods with deep learning algorithms. Many convolutional neural network (CNN) models (such as VGG, ResNet, or Inception) have been used for image recognition purposes but it is still a very limited application in the use of tick identification. Here, we describe the modified CNN-based models which were trained using a large-scale molecularly verified dataset to identify tick species. The best CNN model achieved a 99.5% accuracy on the test set. These results demonstrate that a computer vision system is a potential alternative tool to help in prescreening ticks for identification, an earlier diagnosis of disease risk, and, as such, could be a valuable resource for health professionals.

Evaluation of the effectiveness of three sticky traps to monitor four species of cockroaches (Hexapoda: Blattaria) with simulated use tests.

Background: Cockroaches are the pest of major concern for the disinfestation programs of the sanitary system in Italy. Hygienic-sanitary interest is linked to the role of mechanical vectors of pathogens and to their allergological potential. Sticky traps are the best tool to monitor the presence of these insects and several types of them are available on the market. In most of the cases the traps are not indicated for a given species, but, instead, generically for cockroaches. Domestic cockroaches differ in morphology, size and habits. Consequently, the effectiveness of the trap can change in relation to the target species. Materials and methods: In this study three of the most employed traps in Italy were compared: the INDIA trap with and without its attractant tablet (hereafter mentioned as INDIA-A and INDIA-E, respectively), the ZAPI Simply trap and the CATCHMASTER Spider & Insect Glue trap. We chose the four most common species of cockroach (Blattodea) in Italy, Blatta orientalis (L.), Periplaneta americana (L.) (Blattidae), Blattella germanica (L.) and Supella longipalpa (F.) (Blattellidae). Each species of cockroach was tested separately inside arenas containing one of the traps. Each test (one species with one kind of trap) was replicated five times. Results and discussion: The INDIA-A trap collected more cockroaches of every species, followed by the INDIA-E. The ZAPI trap caught less specimens of each species in respect to the INDIA traps, with the only exception of B. orientalis, for which the ZAPI trap caught more than the INDIA-E. The CATCHMASTER trap performed significantly less for all the species. B. orientalis was the species most abundantly caught by all traps, followed by B. germanica, S. longipalpa and P. americana. No significant difference was observed in the catch according to the developmental stage. In general, there was no particular predisposition of any trap to catch a particular species. Conclusions: It is not possible to indicate a model of trap for each species of cockroach, but it is clear that different traps have different performances in terms of attractiveness and capture. Therefore, the choice of the trap affects the results of the monitoring, and as consequence, the evaluation of the infesting population of the pest.

Estimation of Ixodes ricinus (Acari: Ixodidae) Populations of Kaylaka Park in the Town of Pleven, Bulgaria.

(1) Background: Ticks are vectors of a large number of pathogenic microorganisms, which cause serious diseases in both humans and animals. Kaylaka Park is located in northern Bulgaria close to the city of Pleven. Part of the park is urbanized and visited daily by many citizens. The aim of our study was to determine the presence and distribution of hard ticks in the park area by surveying and comparing four urbanized with four wild areas. (2) Methods: Ticks were collected by flagging from 2016 to 2020 during the spring-summer season (March-July). Air temperature, relative humidity, collection time and flagging area were measured during the campaign. (3) Results: A total of 622 ticks were collected: 285 females (46%), 272 (44%) males and 64 (10%) nymphs. All were identified as Ixodes ricinus. Wild areas showed statistically significant higher values of ticks collected per minute (p = 0.009) and nymph densities (p = 0.003) compared to urbanized sampling sites. Other densities indices did not have a significant difference between urban and wild areas. Highest numbers of Ixodes ticks were collected at a temperature of 20 °C and at 60% relative humidity. The active questing began in March, peaked in end of April and declined in June. (4) Conclusions: In the present study, we found that ecological factors in the Kaylaka Park area are favourable for the development and distribution of tick populations. The results give us reason to consider that there is a high risk to visitors from tick bites in the Kaylaka Park area.

Checklist of the mosquito fauna (Diptera, Culicidae) of Cambodia.

Between 2016 and 2020, the Medical and Veterinary Entomology unit of the Institut Pasteur du Cambodge collected over 230,000 mosquitoes. Based on this sampling effort, a checklist of 290 mosquito species in Cambodia is presented. This is the first attempt to list the Culicidae fauna of the country. We report 49 species for the first time in Cambodia. The 290 species belong to 20 genera: Aedeomyia (1 sp.), Aedes (55 spp.), Anopheles (53 spp.), Armigeres (26 spp.), Coquillettidia (3 spp.), Culex (57 spp.), Culiseta (1 sp.), Ficalbia (1 sp.), Heizmannia (10 spp.), Hodgesia (3 spp.), Lutzia (3 spp.), Malaya (2 spp.), Mansonia (5 spp.), Mimomyia (7 spp.), Orthopodomyia (3 spp.), Topomyia (4 spp.), Toxorhynchites (4 spp.), Tripteroides (6 spp.), Uranotaenia (27 spp.), and Verrallina (19 spp.). The Cambodian Culicidae fauna is discussed in its Southeast Asian context. Forty-three species are reported to be of medical importance, and are involved in the transmission of pathogens.

TITLE: Liste des moustiques (Diptera, Culicidae) du Cambodge. ABSTRACT: Entre 2016 et 2020, plus de 230 000 moustiques ont été capturés par l'Unité d'Entomologie Médicale et Vétérinaire de l'Institut Pasteur du Cambodge. Sur la base de ces collectes, une liste des 290 espèces de moustiques présentes au Cambodge est présentée. Il s'agit de la première tentative de répertorier la faune Culicidae du pays. Quarante-neuf espèces sont signalées pour la première fois au Cambodge. Les 290 espèces appartiennent à vingt genres : Aedeomyia (1 sp.), Aedes (55 spp.), Anopheles (53 spp.), Armigeres (26 spp.), Coquillettidia (3 spp.), Culex (57 spp.), Culiseta (1 sp.), Ficalbia (1 sp.), Heizmannia (10 spp.), Hodgesia (3 spp.), Lutzia (3 spp.), Malaya (2 spp.), Mansonia (5 spp.), Mimomyia (7 spp.), Orthopodomyia (3 spp.), Topomyia (4 spp.), Toxorhynchites (4 spp.), Tripteroides (6 spp.), Uranotaenia (27 spp.) et Verrallina (19 spp.). La faune des Culicidés cambodgiens est discutée dans son contexte sud-est asiatique. Quarante-trois espèces sont d'importance médicale et impliquées dans la transmission de pathogènes.

Highlights of Medical Entomology, 2020.

Medical Entomology as a field is inherently global - thriving on international and interdisciplinary collaborations and affected dramatically by arthropod and pathogen invasions and introductions. This past year also will be remembered as the year in which the SARS-CoV-2 COVID-19 pandemic affected every part of our lives and professional activities and impacted (or changed, sometimes in good ways) our ability to collaborate and detect or respond to invasions. This incredible year is the backdrop for the 2020 Highlights in Medical Entomology. This article highlights the broad scope of approaches and disciplines represented in the 2020 published literature, ranging from sensory and chemical ecology, population genetics, impacts of human-mediated environmental change on vector ecology, life history and the evolution of vector behaviors, to the latest developments in vector surveillance and control.

Anthrenus sp. and an Uncommon Cluster of Dermatitis.

We report patients in their homes in France who had cutaneous lesions caused by Anthrenus sp. larvae during the end of winter and into spring. These lesions mimic bites but are allergic reactions to larvae hairs pegged in the skin. These lesions should be distinguished from bites of bed bugs or fleas.

[Vector management of arbovirosis cases notified in the city of Valencia, Spain (2016-2018).] / Gestión vectorial de los casos de arbovirosis notificados en la ciudad de Valencia, España (2016-2018).

OBJECTIVE: Environmental management of imported arboviruses such as dengue (DENV), Zika (ZIKV) or Chikungunya (CHIKV) is a task of great significance for Public Health since the arrival and establishment of the competent vector Aedes albopictus (Asian tiger mosquito) in numerous cities of our country. There are recent examples of autochthonous transmission of some of these arboviruses in Spain probably linked to undetected and / or unmanaged imported cases. METHODS: Vector management interventions were carried out in the city of Valencia (Spain) by the Health Service of the Valencia City Council between 2016 and 2018. These actions took place within the framework of a coordination protocol established with the Health authorities of the Valencia regional government. RESULTS: A total of 21 arbovirus cases were reported and led to entomological surveillance and vector control interventions in the city of Valencia: 8 DENV, 7 CHIKV and 6 ZIKV. In 8 of these 21 cases (38%) the presence of Ae. Albopictus was detected within the risk zones established for each case. CONCLUSIONS: Vector surveillance and control strategies associated with imported cases of arboviruses, provide accurate information on the environmental risks of amplification of these viruses and also allow reducing these risks through population control of vectors. Due to the short duration of the viremic phases, these interventions should be carried out as quickly as possible in order to reduce the hypothetical contact between the infected person and vector as much as possible.

OBJETIVO: La gestión ambiental de arbovirosis importadas como dengue (DENV), Zika (ZIKV) o Chikungunya (CHIKV) es una tarea de gran significancia para la Salud Pública desde la llegada y establecimiento del vector competente Aedes albopictus (mosquito tigre) a numerosas ciudades de nuestro país. Existen ejemplos recientes de transmisión autóctona de algunas de estas arbovirosis en España que, supuestamente, tienen su origen probablemente en casos importados no detectados y/o no gestionados. METODOS: Se llevaron a cabo intervenciones de manejo antivectorial en la ciudad de València por parte del Servicio de Sanidad del Ayuntamiento, entre los años 2016 y 2018. Dichas actuaciones se produjeron en el marco de un protocolo de coordinación establecido con la Conselleria de Sanitat de la Generalitat Valenciana. RESULTADOS: Un total de 21 casos de arbovirosis fueron comunicados y derivaron en intervenciones ambientales de vigilancia entomológica y control vectorial en la ciudad de València: 8 DENV, 7 CHIKV y 6 ZIKV. En 8 de estos 21 casos (38%) se identificó la presencia de Ae. albopictus dentro de las zonas de riesgo establecidas para cada caso. CONCLUSIONES: Estrategias de vigilancia y control vectorial asociadas a los casos importados de arbovirosis, aportan información precisa de los riesgos ambientales de amplificación de estas virosis y permiten también reducir dichos riesgos a través del control poblacional de los vectores. Debido al corto tiempo de duración de las fases de viremia, dichas intervenciones deben realizarse con la mayor celeridad posible en aras de poder reducir al máximo el hipotético contacto entre persona infectada y vector.