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Zicola J, Dasari P, Hahn KK, Ziese-Kubon K, Meurer A, Buhl T, Scholten S. De novo transcriptome assembly of the oak processionary moth Thaumetopoea processionea. BMC Genom Data 2024; 25:55. [PMID: 38851674 PMCID: PMC11161914 DOI: 10.1186/s12863-024-01237-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 05/24/2024] [Indexed: 06/10/2024] Open
Abstract
OBJECTIVES The oak processionary moth (OPM) (Thaumetopoea processionea) is a species of moth (order: Lepidoptera) native to parts of central Europe. However, in recent years, it has become an invasive species in various countries, particularly in the United Kingdom and the Netherlands. The larvae of the OPM are covered with urticating barbed hairs (setae) causing irritating and allergic reactions at the three last larval stages (L3-L5). The aim of our study was to generate a de novo transcriptomic assembly for OPM larvae by including one non-allergenic stage (L2) and two allergenic stages (L4 and L5). A transcriptomic assembly will help identify potential allergenic peptides produced by OPM larvae, providing valuable information for developing novel therapeutic strategies and allergic immunodiagnostic assays. DATA Transcriptomes of three larval stages of the OPM were de novo assembled and annotated using Trinity and Trinotate, respectively. A total of 145,251 transcripts from 99,868 genes were identified. Bench-marking universal single-copy orthologues analysis indicated high completeness of the assembly. About 19,600 genes are differentially expressed between the non-allergenic and allergenic larval stages. The data provided here contribute to the characterization of OPM, which is both an invasive species and a health hazard.
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Affiliation(s)
- Johan Zicola
- Division of Crop Plant Genetics, Department of Crop Science, Georg-August-University Göttingen, Göttingen, Germany
- Center for integrated Breeding Research (CiBreed), Göttingen, Germany
| | - Prasad Dasari
- Department of Dermatology, University Medical Center Göttingen, Göttingen, Germany
| | - Katharina Klara Hahn
- Department of Dermatology, University Medical Center Göttingen, Göttingen, Germany
| | - Katharina Ziese-Kubon
- Division of Crop Plant Genetics, Department of Crop Science, Georg-August-University Göttingen, Göttingen, Germany
- Center for integrated Breeding Research (CiBreed), Göttingen, Germany
| | - Armin Meurer
- Faculty of Resource Management, University of Applied Sciences and Arts (HAWK), Göttingen, Germany
| | - Timo Buhl
- Department of Dermatology, University Medical Center Göttingen, Göttingen, Germany
| | - Stefan Scholten
- Division of Crop Plant Genetics, Department of Crop Science, Georg-August-University Göttingen, Göttingen, Germany.
- Center for integrated Breeding Research (CiBreed), Göttingen, Germany.
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Viquez C, Rojas-Gätjens D, Mesén-Porras E, Avendaño R, Sasa M, Lomonte B, Chavarría M. Venom-microbiomics of eight species of Neotropical spiders from the Theraphosidae family. J Appl Microbiol 2024; 135:lxae113. [PMID: 38692848 DOI: 10.1093/jambio/lxae113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/22/2024] [Accepted: 04/30/2024] [Indexed: 05/03/2024]
Abstract
AIM Tarantulas are one of the largest predatory arthropods in tropical regions. Tarantulas though not lethal to humans, their venomous bite kills small animals and insect upon which they prey. To understand the abiotic and biotic components involved in Neotropical tarantula bites, we conducted a venom-microbiomics study in eight species from Costa Rica. METHODS AND RESULTS We determined that the toxin profiles of tarantula venom are highly diverse using shotgun proteomics; the most frequently encountered toxins were ω-Ap2 toxin, neprilysin-1, and several teraphotoxins. Through culture-independent and culture-dependent methods, we determined the microbiota present in the venom and excreta to evaluate the presence of pathogens that could contribute to primary infections in animals, including humans. The presence of opportunistic pathogens with hemolytic activity was observed, with a prominence of Stenotrophomonas in the venoms. Other bacteria found in venoms and excreta with hemolytic activity included members of the genera Serratia, Bacillus, Acinetobacter, Microbacterium, and Morganella. CONCLUSIONS Our data shed light on the venom- and gut-microbiome associated with Neotropical tarantulas. This information may be useful for treating bites from these arthropods in both humans and farm animals, while also providing insight into the toxins and biodiversity of this little-explored microenvironment.
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Affiliation(s)
- Carlos Viquez
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, San José 1174-1200, Costa Rica
- Oficina subregional de Alajuela, Sistema Nacional de Áreas de Conservación (SINAC), Ministerio Ambiente y Energía (MINAE), Alajuela 20101, Costa Rica
| | - Diego Rojas-Gätjens
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, San José 1174-1200, Costa Rica
- Centro de Investigaciones en Productos Naturales (CIPRONA), Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - Esteve Mesén-Porras
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, San José 1174-1200, Costa Rica
| | - Roberto Avendaño
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, San José 1174-1200, Costa Rica
| | - Mahmood Sasa
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica
- Museo de Zoología, Centro de Investigación de Biodiversidad y Ecología Tropical, Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - Max Chavarría
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, San José 1174-1200, Costa Rica
- Centro de Investigaciones en Productos Naturales (CIPRONA), Universidad de Costa Rica, San José 11501-2060, Costa Rica
- Escuela de Química, Universidad de Costa Rica, San José 11501-2060, Costa Rica
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Uemura M, Zalucki MP, Battisti A. Large Male Caterpillars Are the Primary Builders: Exploring Tent Construction and Foraging Behaviour in Gregarious Pine Processionary Caterpillar. INSECTS 2023; 14:829. [PMID: 37887841 PMCID: PMC10607817 DOI: 10.3390/insects14100829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/19/2023] [Accepted: 10/19/2023] [Indexed: 10/28/2023]
Abstract
As a social organism, living in a communal structure is one of the most important physical barriers against environmental elements and natural enemies. Thaumetopoea pityocampa (Notodontidae, Thaumetopoeinae) caterpillars are conifer pests that spend most of their larval stage in winter. Although T. pityocampa holds economic and medical significance, the tent construction and foraging behaviour are poorly understood. We observed the tent construction behaviour in autumn (October and November) when third- and fourth-instar T. pityocampa caterpillars build the 'winter tent' that can withstand winter conditions. Just before sunset, with no rain and temperatures over 12 °C, tent construction was undertaken by early active individuals, primarily larger male caterpillars. Early active caterpillars emerge from the tent first and spin silk on the tent for expansion and strength. Once temperatures dropped below 12 °C and twilight had passed, the early active caterpillars went out to forage and were later joined by the late active caterpillars, which were predominantly smaller females that had remained inside the tent. Foraging behaviour was continuously monitored for the first to fourth larval instars in the field. Foraging was more frequent in younger instars when environmental temperatures were warmer and became continuous and prolonged in later instar caterpillars as temperatures dropped. The final tent structure built by later instar caterpillars had the thickest layer of silk on the southern side of the tent compared to other orientations to receive maximum solar radiation during the winter. Our study provided additional insights into the collective nest building, foraging and social behaviours observed in Lepidoptera, as well as the roles of individuals within non-eusocial insect colonies.
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Affiliation(s)
- Mizuki Uemura
- School of the Environment, The University of Queensland, St Lucia, QLD 4072, Australia
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, 35020 Legnaro, Italy;
| | - Myron P. Zalucki
- School of the Environment, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Andrea Battisti
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, 35020 Legnaro, Italy;
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Simon M, Hoyte C. A Case Report of Venezuelan Suntiger Tarantula (Psalmopoeus Irminia) Envenomation and Review of Tarantula Exposures. J Emerg Med 2023; 65:e199-e203. [PMID: 37635034 DOI: 10.1016/j.jemermed.2023.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 05/26/2023] [Indexed: 08/29/2023]
Abstract
BACKGROUND Tarantula envenomations are encountered infrequently but may increase with increased exotic animal ownership. This case report presents the first documented toxicity from a Venezuelan suntiger tarantula (VST), Psalmopoeus irminia, and provides a general framework for approaching patients with tarantula exposures. CASE REPORT A 35-year-old man presented to an emergency department 4 h after experiencing a bite from his pet VST. He developed erythema, pain, and edema to the bite site on the left thenar eminence that extended proximally. Within 4 h, he developed abdominal pain, nausea, vomiting, throat itching, and tightness. The patient had a blood pressure of 131/105 mm Hg, heart rate of 102 beats/min, 36.6°C, respiratory rate of 20 breaths/min, and SpO2 of 94%. Laboratory evaluations were within normal limits (other than chronically elevated but improved transaminases). The patient received 0.5 mg epinephrine intramuscularly, 50 mg diphenhydramine IV, 20 mg famotidine IV, 0.4 mg ondansetron IV, and 1 L of normal saline for a suspected anaphylactic reaction. Shortly after epinephrine administration, his gastrointestinal and upper airway symptoms resolved. All symptoms resolved within 1 week. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Little is known about VST toxicity. Therefore, providers should rely on a general framework for approaching patients with tarantula exposures. Morbidity from tarantula exposures is mediated by mechanical injury, venom effects, and hypersensitivity reactions. Typical clinical findings include local pain, pruritis, edema, erythema, and burning. Muscle cramping, ophthalmia nodosa, and hypersensitivity reactions may occur. Treatment is primarily supportive and includes decontamination, cool compresses, analgesia, treatment of anaphylaxis, and ophthalmology evaluation if ocular exposure.
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Affiliation(s)
- Mark Simon
- Rocky Mountain Poison and Drug Safety, Denver Health and Hospital Authority, Denver, Colorado; Department of Emergency Medicine, Denver Health and Hospital Authority, Denver, Colorado
| | - Christopher Hoyte
- Rocky Mountain Poison and Drug Safety, Denver Health and Hospital Authority, Denver, Colorado; Department of Emergency Medicine, University of Colorado Hospital, Aurora, Colorado
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Olivieri M, Ludovico E, Battisti A. Occupational Exposure of Forest Workers to the Urticating Setae of the Pine Processionary Moth Thaumetopoea pityocampa. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4735. [PMID: 36981645 PMCID: PMC10049294 DOI: 10.3390/ijerph20064735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/05/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
The larvae of the pine processionary moth are a threat to public health because they produce detachable setae that are about 200 µm long and 6 µm wide, reaching a total number of up to 1 million per mature individual. The setae are intended to be released to protect the larvae from predators but become a public health issue when in contact with humans and warm-blooded animals. Symptoms associated with the setae are typically urticaria and local swelling erythema, although edema of the skin, conjunctivitis or respiratory mucosa may occur. Occupational exposure concerns mainly forest workers but also farmers and gardeners. In the present study, we quantify the exposure to the setae of forest workers in a district of Northern Italy. The pine processionary moth represents a real case of occupational exposure as the urticating setae produced by the larvae caused symptoms in most forest workers directly in contact with the infested trees. In addition, the urticating setae were detected on the body of the chainsaw operators and in the surroundings of the felled trees during the operations. The non-exposed workers of the same agency did not report symptoms, with only one exception, likely linked to a non-occupational exposure. As the risk is not immediately perceived by the workers because direct contact with the larvae is unlikely, a campaign of information to workers and the general population living nearby infested forestry areas about the risk associated with airborne exposure is recommended. This becomes especially important in the areas of recent expansion of the insect, where people are inexperienced.
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Affiliation(s)
- Mario Olivieri
- Unit of Occupational Medicine, Department of Diagnostics and Public Health, University of Verona, 37129 Verona, Italy
| | - Enzo Ludovico
- Unit of Occupational Medicine, Department of Diagnostics and Public Health, University of Verona, 37129 Verona, Italy
| | - Andrea Battisti
- Department DAFNAE, University of Padova, Legnaro, 35122 Padova, Italy
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Wang ZH, Jiang L. Ultramorphology of the mature larvae of Sericinus montela Grey (Lepidoptera: Papilionidae), with descriptions of osmeterium using a novel method of larval preservation. J NAT HIST 2023. [DOI: 10.1080/00222933.2023.2167620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Zi-Hao Wang
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Lu Jiang
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning, China
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Ruzzier E, Muzzi M, Kadej M, Battisti A, Di Giulio A. Trogoderma granarium Everts, 1898 (Coleoptera: dermestidae) – a model species to investigate hastisetae functional morphology. THE EUROPEAN ZOOLOGICAL JOURNAL 2022. [DOI: 10.1080/24750263.2022.2101697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
Affiliation(s)
- E. Ruzzier
- Department of Agronomy, Food, Natural Resources, Animals and the Environment (DAFNAE), University of Padova, Padova, Italy
| | - M. Muzzi
- Department of Science, University of Roma Tre, Rome, Italy
- Laboratorio Interdipartimentale di Microscopia Elettronica (L.I.M.E.), University of Roma Tre, Rome, Italy
| | - M. Kadej
- Department of Invertebrate Biology, Evolution and Conservation, University of Wrocław, Wrocław, Poland
| | - A. Battisti
- Department of Agronomy, Food, Natural Resources, Animals and the Environment (DAFNAE), University of Padova, Padova, Italy
| | - A. Di Giulio
- Department of Science, University of Roma Tre, Rome, Italy
- Laboratorio Interdipartimentale di Microscopia Elettronica (L.I.M.E.), University of Roma Tre, Rome, Italy
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Quintin A, Hamon L, Flockerzi FA, Schlötzer-Schrehardt U, Dias Blak M, Seitz B. Corneal epithelial ingrowth after perforating corneal injury: a case report. BMC Ophthalmol 2022; 22:510. [PMID: 36564731 PMCID: PMC9784072 DOI: 10.1186/s12886-022-02670-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 11/03/2022] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Epithelial ingrowth is a rare complication after ocular perforation and can become manifest many years after the primary trauma. CASE PRESENTATION A 49-year-old patient presented with a positive Seidel test of unclear origin at her left eye, as well as a sharply defined anterior-stromal corneal scar at both eyes. Prior operations included a bilateral laser-assisted blepharoplasty 3 months earlier. The patient indicated to have been on holiday to France 5 months earlier, during an ongoing oak processionary moth caterpillars infestation. The examination using confocal microscopy confirmed a corneal perforation at the left eye and revealed corneal epithelial ingrowth capped with scarred stroma in both eyes. We performed a penetrating keratoplasty at the left eye. The scarred and perforated host cornea was divided into 4 pieces for further investigation: microbiology (negative), virology (negative), histology and transmission electron microscopy (TEM). Histology revealed differently structured epithelium, centrally inverted into the stroma through defects in Bowman's layer. TEM revealed full thickness corneal perforation with an epithelial plug extending to the lower third of the cornea, but without evidence of epithelial cell migration into the anterior chamber. Our differential diagnosis of the unclear positive Seidel test with epithelial ingrowth was as follows: (1) corneal perforation by hairs of the oak processionary moth caterpillar, although no hairs could be found histologically; (2) corneal perforation during laser-assisted blepharoplasty, which may be supported by the presence of pigmented cells on the posterior surface of Descemet´s membrane, pointing to a possible iris injury. CONCLUSION Consequently, we highlighted that contact lenses can be useful, safe and inexpensive protective devices in upper eyelid procedures to protect the cornea against mechanical iatrogenic trauma.
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Affiliation(s)
- Adrien Quintin
- Department of Ophthalmology, Saarland University Medical Centre (UKS), Homburg/Saar, Germany.
| | - Loïc Hamon
- grid.411937.9Department of Ophthalmology, Saarland University Medical Centre (UKS), Homburg/Saar, Germany
| | - Fidelis A. Flockerzi
- grid.411937.9Department of Pathology, Saarland University Medical Centre (UKS), Homburg/Saar, Germany
| | - Ursula Schlötzer-Schrehardt
- grid.5330.50000 0001 2107 3311Department of Ophthalmology, University of Erlangen-Nürnberg, Erlangen, Germany
| | | | - Berthold Seitz
- grid.411937.9Department of Ophthalmology, Saarland University Medical Centre (UKS), Homburg/Saar, Germany
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Boukouvala MC, Kavallieratos NG, Skourti A, Pons X, Alonso CL, Eizaguirre M, Fernandez EB, Solera ED, Fita S, Bohinc T, Trdan S, Agrafioti P, Athanassiou CG. Lymantria dispar (L.) (Lepidoptera: Erebidae): Current Status of Biology, Ecology, and Management in Europe with Notes from North America. INSECTS 2022; 13:insects13090854. [PMID: 36135555 PMCID: PMC9506003 DOI: 10.3390/insects13090854] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 05/13/2023]
Abstract
The European Spongy moth, Lymantria dispar (L.) (Lepidoptera: Erebidae), is an abundant species found in oak woods in Central and Southern Europe, the Near East, and North Africa and is an important economic pest. It is a voracious eater and can completely defoliate entire trees; repeated severe defoliation can add to other stresses, such as weather extremes or human activities. Lymantria dispar is most destructive in its larval stage (caterpillars), stripping away foliage from a broad variety of trees (>500 species). Caterpillar infestation is an underestimated problem; medical literature reports that established populations of caterpillars may cause health problems to people and animals. Inflammatory reactions may occur in most individuals after exposure to setae, independent of previous exposure. Currently, chemical and mechanical methods, natural predators, and silvicultural practices are included for the control of this species. Various insecticides have been used for its control, often through aerial sprayings, which negatively affect biodiversity, frequently fail, and are inappropriate for urban/recreational areas. However, bioinsecticides based on various microorganisms (e.g., entomopathogenic viruses, bacteria, and fungi) as well as technologies such as mating disruption using sex pheromone traps have replaced insecticides for the management of L. dispar.
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Affiliation(s)
- Maria C. Boukouvala
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., 11855 Athens, Greece
- Correspondence: (M.C.B.); (N.G.K.); Tel.: +30-2105294569 (M.C.B.)
| | - Nickolas G. Kavallieratos
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., 11855 Athens, Greece
- Correspondence: (M.C.B.); (N.G.K.); Tel.: +30-2105294569 (M.C.B.)
| | - Anna Skourti
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., 11855 Athens, Greece
| | - Xavier Pons
- Department of Crop and Forest Sciences, Agrotecnio Centre, Universitat de Lleida, Av Rovira Roure 191, 25198 Lleida, Spain
| | - Carmen López Alonso
- Department of Crop and Forest Sciences, Agrotecnio Centre, Universitat de Lleida, Av Rovira Roure 191, 25198 Lleida, Spain
| | - Matilde Eizaguirre
- Department of Crop and Forest Sciences, Agrotecnio Centre, Universitat de Lleida, Av Rovira Roure 191, 25198 Lleida, Spain
| | | | - Elena Domínguez Solera
- AIMPLAS, Plastics Technology Centre, València Parc Tecnològic, Gustave Eiffel 4, 46980 Paterna, Spain
| | - Sergio Fita
- AIMPLAS, Plastics Technology Centre, València Parc Tecnològic, Gustave Eiffel 4, 46980 Paterna, Spain
| | - Tanja Bohinc
- Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Stanislav Trdan
- Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Paraskevi Agrafioti
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou Str., 38446 Nea Ionia, Greece
| | - Christos G. Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou Str., 38446 Nea Ionia, Greece
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Seldeslachts A, Peigneur S, Mebs D, Tytgat J. Unraveling the venom chemistry with evidence for histamine as key regulator in the envenomation by caterpillar Automeris zaruma. Front Immunol 2022; 13:972442. [PMID: 36091066 PMCID: PMC9448982 DOI: 10.3389/fimmu.2022.972442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
Over the past decades, envenomation by caterpillars of Automeris spp. became an increasing health problem in Latin America. Accidental contact with the stinging spines of these caterpillars cause acute local pain, itching, inflammation and skin rashes that persists for days. Even when the cause is obvious, the exact molecular mechanisms responsible for the observed symptoms are yet to be elucidated. Here, we describe for the first time, an active compound in the venom and the study of the bioactivity of the venom extracted from the spines of the caterpillar Automeris zaruma. Electrophysiological screening of a library of membrane proteins important for pain and itch enabled us to investigate and reveal the mode of action of the venom of A. zaruma. Further mass spectrometric analysis (Q-TOF-MS) made it possible to establish a link between the bioactivity and the components found in the venom. We show that the spine extract of A. zaruma contains histamine that potently activates the four types of the human histamine receptors (H1R, H2R, H3R and H4R) with a selectivity preference towards H3R and H4R. Furthermore, a modulation of the target MRGPRX2 was found. Together, these findings are the first to explain the symptomology of A. zaruma envenomation, enabling us a better understanding of caterpillar envenomation and predict that the hurdle of the scarce efficacy of the currently used antihistaminic drugs can be overcome by including H3R and H4R blockers in the clinical used medication. Such an approach might be used for other caterpillar envenomation in the world and represent a significant improvement for the well-being of the patient.
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Affiliation(s)
| | | | - Dietrich Mebs
- Institute of Legal Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Jan Tytgat
- Toxicology and Pharmacology, KU Leuven, Leuven, Belgium
- *Correspondence: Jan Tytgat,
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Bai L, Liu L, Esquivel M, Tardy BL, Huan S, Niu X, Liu S, Yang G, Fan Y, Rojas OJ. Nanochitin: Chemistry, Structure, Assembly, and Applications. Chem Rev 2022; 122:11604-11674. [PMID: 35653785 PMCID: PMC9284562 DOI: 10.1021/acs.chemrev.2c00125] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Chitin, a fascinating biopolymer found in living organisms, fulfills current demands of availability, sustainability, biocompatibility, biodegradability, functionality, and renewability. A feature of chitin is its ability to structure into hierarchical assemblies, spanning the nano- and macroscales, imparting toughness and resistance (chemical, biological, among others) to multicomponent materials as well as adding adaptability, tunability, and versatility. Retaining the inherent structural characteristics of chitin and its colloidal features in dispersed media has been central to its use, considering it as a building block for the construction of emerging materials. Top-down chitin designs have been reported and differentiate from the traditional molecular-level, bottom-up synthesis and assembly for material development. Such topics are the focus of this Review, which also covers the origins and biological characteristics of chitin and their influence on the morphological and physical-chemical properties. We discuss recent achievements in the isolation, deconstruction, and fractionation of chitin nanostructures of varying axial aspects (nanofibrils and nanorods) along with methods for their modification and assembly into functional materials. We highlight the role of nanochitin in its native architecture and as a component of materials subjected to multiscale interactions, leading to highly dynamic and functional structures. We introduce the most recent advances in the applications of nanochitin-derived materials and industrialization efforts, following green manufacturing principles. Finally, we offer a critical perspective about the adoption of nanochitin in the context of advanced, sustainable materials.
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Affiliation(s)
- Long Bai
- Key
Laboratory of Bio-based Material Science & Technology (Ministry
of Education), Northeast Forestry University, Harbin 150040, P.R. China
- Bioproducts
Institute, Department of Chemical & Biological Engineering, Department
of Chemistry, and Department of Wood Science, 2360 East Mall, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Liang Liu
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, Jiangsu Key Lab of Biomass-Based Green Fuel and Chemicals,
College of Chemical Engineering, Nanjing
Forestry University, 159 Longpan Road, Nanjing 210037, P.R. China
| | - Marianelly Esquivel
- Polymer
Research Laboratory, Department of Chemistry, National University of Costa Rica, Heredia 3000, Costa Rica
| | - Blaise L. Tardy
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, FI-00076 Aalto, Finland
- Department
of Chemical Engineering, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Siqi Huan
- Key
Laboratory of Bio-based Material Science & Technology (Ministry
of Education), Northeast Forestry University, Harbin 150040, P.R. China
- Bioproducts
Institute, Department of Chemical & Biological Engineering, Department
of Chemistry, and Department of Wood Science, 2360 East Mall, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Xun Niu
- Bioproducts
Institute, Department of Chemical & Biological Engineering, Department
of Chemistry, and Department of Wood Science, 2360 East Mall, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Shouxin Liu
- Key
Laboratory of Bio-based Material Science & Technology (Ministry
of Education), Northeast Forestry University, Harbin 150040, P.R. China
| | - Guihua Yang
- State
Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of
Sciences, Jinan 250353, China
| | - Yimin Fan
- Jiangsu
Co-Innovation Center of Efficient Processing and Utilization of Forest
Resources, Jiangsu Key Lab of Biomass-Based Green Fuel and Chemicals,
College of Chemical Engineering, Nanjing
Forestry University, 159 Longpan Road, Nanjing 210037, P.R. China
| | - Orlando J. Rojas
- Bioproducts
Institute, Department of Chemical & Biological Engineering, Department
of Chemistry, and Department of Wood Science, 2360 East Mall, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, FI-00076 Aalto, Finland
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12
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Michienzi AE, Holstege EP, Cole RJ, Charlton NP. The Sting of a White Flannel Moth Caterpillar (Novape ovina). Wilderness Environ Med 2022; 33:329-331. [PMID: 35577658 DOI: 10.1016/j.wem.2022.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/28/2022] [Accepted: 03/23/2022] [Indexed: 12/01/2022]
Abstract
The purpose of this report is to describe a case of urticarial dermatitis, or erucism, caused by the white flannel moth caterpillar (Norape ovina) in central Virginia. Many caterpillars are known to cause erucism, with the puss caterpillar (Megalopyge opercularis) being the most reported culprit in the United States. White flannel moth caterpillars are expected to cause erucism as they belong to the same family as the puss caterpillar (Megalopygidae) and have similar venom-containing hairs, but no reports of the reaction or clinical course have been documented in the medical literature. A subject was stung by a white flannel moth caterpillar after it fell on his neck while clearing brush with a machete. The subject experienced immediate pain and developed a raised, erythematous rash where the caterpillar had fallen. The rash, referred to as erucism, was painful for 1 d and improved slowly over the course of 2 wk, but a small area of discoloration remained 2.5 mo after contact. Symptoms were managed by the subject at home and no medications were administered. The white flannel moth caterpillar inflicts erucism similar to that caused by the more commonly mentioned puss caterpillar. If only local symptoms are sustained from contact with a white flannel moth caterpillar, it can be safely and effectively managed with over-the-counter medications similar to the management for erucism induced by other caterpillar species. Irrigation and removal of urticating hairs with adhesive tape may help reduce the pain and is recommended, though not performed in this case.
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Affiliation(s)
- Avery E Michienzi
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia.
| | - Erik P Holstege
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Ryan J Cole
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Nathan P Charlton
- Division of Medical Toxicology, Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
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13
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von Beeren C, Brückner A, Hoenle PO, Ospina-Jara B, Kronauer DJC, Blüthgen N. Multiple phenotypic traits as triggers of host attacks towards ant symbionts: body size, morphological gestalt, and chemical mimicry accuracy. Front Zool 2021; 18:46. [PMID: 34538256 PMCID: PMC8451089 DOI: 10.1186/s12983-021-00427-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/19/2021] [Indexed: 03/24/2023] Open
Abstract
Background Ant colonies are plagued by a diversity of arthropod guests, which adopt various strategies to avoid or to withstand host attacks. Chemical mimicry of host recognition cues is, for example, a common integration strategy of ant guests. The morphological gestalt and body size of ant guests have long been argued to also affect host hostility, but quantitative studies testing these predictions are largely missing. We here evaluated three guest traits as triggers of host aggression—body size, morphological gestalt, and accuracy in chemical mimicry—in a community of six Eciton army ant species and 29 guest species. We quantified ant aggression towards 314 guests in behavioral assays and, for the same individuals, determined their body size and their accuracy in mimicking ant cuticular hydrocarbon (CHC) profiles. We classified guests into the following gestalts: protective, myrmecoid, staphylinid-like, phorid-like, and larval-shaped. We expected that (1) guests with lower CHC mimicry accuracy are more frequently attacked; (2) larger guests are more frequently attacked; (3) guests of different morphological gestalt receive differing host aggression levels. Results Army ant species had distinct CHC profiles and accuracy of mimicking these profiles was variable among guests, with many species showing high mimicry accuracy. Unexpectedly, we did not find a clear relationship between chemical host similarity and host aggression, suggesting that other symbiont traits need to be considered. We detected a relationship between the guests’ body size and the received host aggression, in that diminutive forms were rarely attacked. Our data also indicated that morphological gestalt might be a valuable predictor of host aggression. While most ant-guest encounters remained peaceful, host behavior still differed towards guests in that ant aggression was primarily directed towards those guests possessing a protective or a staphylinid-like gestalt. Conclusion We demonstrate that CHC mimicry accuracy does not necessarily predict host aggression towards ant symbionts. Exploitation mechanisms are diverse, and we conclude that, besides chemical mimicry, other factors such as the guests’ morphological gestalt and especially their body size might be important, yet underrated traits shaping the level of host hostility against social insect symbionts. Supplementary Information The online version contains supplementary material available at 10.1186/s12983-021-00427-8.
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Affiliation(s)
- Christoph von Beeren
- Ecological Networks, Department of Biology, Technical University of Darmstadt, Darmstadt, Germany.
| | - Adrian Brückner
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, USA
| | - Philipp O Hoenle
- Ecological Networks, Department of Biology, Technical University of Darmstadt, Darmstadt, Germany
| | | | - Daniel J C Kronauer
- Laboratory of Social Evolution and Behavior, The Rockefeller University, New York City, USA
| | - Nico Blüthgen
- Ecological Networks, Department of Biology, Technical University of Darmstadt, Darmstadt, Germany
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14
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Simone Y, van der Meijden A. Armed stem to stinger: a review of the ecological roles of scorpion weapons. J Venom Anim Toxins Incl Trop Dis 2021; 27:e20210002. [PMID: 34527038 PMCID: PMC8425188 DOI: 10.1590/1678-9199-jvatitd-2021-0002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/18/2021] [Indexed: 12/24/2022] Open
Abstract
Scorpions possess two systems of weapons: the pincers (chelae) and the stinger (telson). These are placed on anatomically and developmentally well separated parts of the body, that is, the oral appendages and at the end of the body axis. The otherwise conserved body plan of scorpions varies most in the shape and relative dimensions of these two weapon systems, both across species and in some cases between the sexes. We review the literature on the ecological function of these two weapon systems in each of three contexts of usage: (i) predation, (ii) defense and (iii) sexual contests. In the latter context, we will also discuss their usage in mating. We first provide a comparative background for each of these contexts of usage by giving examples of other weapon systems from across the animal kingdom. Then, we discuss the pertinent aspects of the anatomy of the weapon systems, particularly those aspects relevant to their functioning in their ecological roles. The literature on the functioning and ecological role of both the chelae and the telson is discussed in detail, again organized by context of usage. Particular emphasis is given on the differences in morphology or usage between species or higher taxonomic groups, or between genders, as such cases are most insightful to understand the roles of each of the two distinct weapon systems of the scorpions and their evolutionary interactions. We aimed to synthesize the literature while minimizing conjecture, but also to point out gaps in the literature and potential future research opportunities.
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Affiliation(s)
- Yuri Simone
- CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO, Porto, Portugal
| | - Arie van der Meijden
- CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO, Porto, Portugal
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15
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Dong B, Wang Y, Li Q, Chen Z. Fleshy scoli removed without detriment: structure and potential anti-predation function in a slug caterpillar (Limacodidae). BEHAVIOUR 2021. [DOI: 10.1163/1568539x-bja10112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Anti-predator outgrowths are found prevalent in animals such as stinging spines of caterpillars. However, an encounter with a predator is usually fatal as caterpillars would die easily even if just small body parts were taken. Here, we showed the larvae of Phrixolepia sp. did not get injured when the fleshy but not urticating scoli were removed. By showing the morphologic traits, we assume these particular scoli function as enlarged warning signals and substitute to be attacked so that caterpillars can warn multiple predators, with a lower chance of getting injured when encountering natural enemies, such as birds and carabid beetles.
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Affiliation(s)
- Bing Dong
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, P.R. China
- Centre for Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla, Yunnan, P.R. China
- University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Yirong Wang
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, P.R. China
| | - Qin Li
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, P.R. China
| | - Zhanqi Chen
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, P.R. China
- Centre for Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla, Yunnan, P.R. China
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16
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Kurzfeld-Zexer L, Inbar M. Gall-forming aphids are protected (and benefit) from defoliating caterpillars: the role of plant-mediated mechanisms. BMC Ecol Evol 2021; 21:124. [PMID: 34144674 PMCID: PMC8214297 DOI: 10.1186/s12862-021-01861-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/11/2021] [Indexed: 11/10/2022] Open
Abstract
Background Interspecific interactions among insect herbivores are common and important. Because they are surrounded by plant tissue (endophagy), the interactions between gall-formers and other herbivores are primarily plant-mediated. Gall-forming insects manipulate their host to gain a better nutrient supply, as well as physical and chemical protection form natural enemies and abiotic factors. Although often recognized, the protective role of the galls has rarely been tested. Results Using an experimental approach, we found that the aphid, Smynthurodes betae, that forms galls on Pistacia atlantica leaves, is fully protected from destruction by the folivorous processionary moth, Thaumetopoea solitaria. The moth can skeletonize entire leaves on the tree except for a narrow margin around the galls that remains intact (“trimmed galls”). The fitness of the aphids in trimmed galls is unharmed. Feeding trials revealed that the galls are unpalatable to the moth and reduce its growth. Surprisingly, S. betae benefits from the moth. The compensatory secondary leaf flush following moth defoliation provides new, young leaves suitable for further gall induction that increase overall gall density and reproduction of the aphid. Conclusions We provide experimental support for the gall defense hypothesis. The aphids in the galls are protracted by plant-mediated mechanisms that shape the interactions between insect herbivores which feed simultaneously on the same host. The moth increase gall demsity on re-growing defoliated shoots.
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Affiliation(s)
- Lilach Kurzfeld-Zexer
- Department of Evolutionary & Environmental Biology, University of Haifa, 3498838, Haifa, Israel
| | - Moshe Inbar
- Department of Evolutionary & Environmental Biology, University of Haifa, 3498838, Haifa, Israel.
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17
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Forkel S, Mörlein J, Sulk M, Beutner C, Rohe W, Schön MP, Geier J, Buhl T. Work-related hazards due to oak processionary moths: a pilot survey on medical symptoms. J Eur Acad Dermatol Venereol 2021; 35:e779-e782. [PMID: 34138502 DOI: 10.1111/jdv.17456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S Forkel
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - J Mörlein
- Department of Animal Sciences, University of Göttingen, Göttingen, Germany
| | - M Sulk
- Department of Dermatology, Venereology and Allergology, University Medical Center Münster, Münster, Germany
| | - C Beutner
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - W Rohe
- Faculty of Resource Management, HAWK Göttingen, Göttingen, Germany
| | - M P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany.,Lower Saxony Institute of Occupational Dermatology, University Medical Center Göttingen, Göttingen, Germany
| | - J Geier
- Lower Saxony Institute of Occupational Dermatology, University Medical Center Göttingen, Göttingen, Germany.,Information Network of Departments of Dermatology (IVDK), University Medical Center Göttingen, Göttingen, Germany
| | - T Buhl
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany.,Lower Saxony Institute of Occupational Dermatology, University Medical Center Göttingen, Göttingen, Germany
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18
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[Ocular irritation after a bicycle tour through Muenster]. Ophthalmologe 2021; 118:504-507. [PMID: 32666170 DOI: 10.1007/s00347-020-01166-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Vasseur P, Sinno-Tellier S, Rousselet J, Langrand J, Roques A, Bloch J, Labadie M. Human exposure to larvae of processionary moths in France: study of symptomatic cases registered by the French poison control centres between 2012 and 2019. Clin Toxicol (Phila) 2021; 60:231-238. [PMID: 33988056 DOI: 10.1080/15563650.2021.1919694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
CONTEXT Contact with the setae of larvae (caterpillars) of pine or oak processionary moths could induce urticarial or allergic reactions in humans. These species are present in France and presently expanding towards highly populated areas due to climate change and/or human-mediated translocations. We aimed to describe the symptomatic cases of exposure to processionary larvae in France. METHODS We conducted a retrospective study of symptomatic cases of exposure to processionary larvae registered by the French poison control centres between 1 January 2012 and 31 July 2019. We reviewed all medical records coded with the agent "larvae". RESULTS Of the 1274 included cases, 59% and 27% corresponded to pine and oak processionary larvae, respectively; the 14% remaining cases concerned unspecified processionary larvae. While the annual number of cases due to pine processionary larvae fluctuated during the study period, cases associated with oak processionary larvae increased steadily. Most of the annual cases occurred between January and May for pine processionary larvae, and April and August for oak processionary larvae (with a peak in March or June, respectively). Among the 1022 cases for which information was available, the sex ratio was 1.2 and the median age was 11 years old. Skin symptoms were reported by 96,3% of the cases, such as pruritus or urticaria. The severity was mild in 96.3% of cases, moderate in 3.5%, and severe in 0.2% (two cases). Ocular or oral exposures led more frequently to severe symptoms than dermal ones (respectively 31% and 18% vs. 2% of cases, p < 10-3). CONCLUSION Since processionary moth larvae exposure is a growing health concern, which can cause severe injuries particularly after ocular or oral exposures, the population, and the professionals should be informed of existing recommendations to avoid exposure and measures to be taken after being exposed.
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Affiliation(s)
- Pauline Vasseur
- National Institute of Health and Medical Research, Paris, France
| | - Sandra Sinno-Tellier
- French Agency for Food, environmental and Occupational Health & Safety, Maisons-Alfort, France
| | - Jérôme Rousselet
- National Research Institute for Agriculture, Food and Environment, Orléans, France
| | | | - Alain Roques
- National Research Institute for Agriculture, Food and Environment, Orléans, France
| | - Juliette Bloch
- French Agency for Food, environmental and Occupational Health & Safety, Maisons-Alfort, France
| | - Magali Labadie
- Poison Control Centre, University hospital, Bordeaux, France
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20
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Entangling the Enemy: Ecological, Systematic, and Medical Implications of Dermestid Beetle Hastisetae. INSECTS 2021; 12:insects12050436. [PMID: 34066086 PMCID: PMC8151106 DOI: 10.3390/insects12050436] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/05/2021] [Accepted: 05/10/2021] [Indexed: 12/03/2022]
Abstract
Simple Summary Larvae of Dermestidae Megatominae possess modified setae, called hastisetae, that serve as the primary defense against predators. These setae, beside a possible usage as discriminant character in larvae identification, are important contaminants of stored products, work and living environments. Exposure to hastisetae causes allergic reactions in humans and the insurgence of skin rashes, asthma, conjunctivitis, and digestive system inflammation. Very little is known about their mechanism of action, because the mechanical trap and their capability to penetrate throughout vertebrate epithelia remain unclear. The primary aim of the present contribution is to increase the general knowledge about hastisetae, exploring their diversity and fine morphology among genera and species. The insertion on integument, the pedicel, the shaft, and the apical head are illustrated in detail, and the first observation of active defensive behavior based on hastisetae is recorded and presented. The internal structure and the apex of the hastisetae are characterized for the first time, offering new interpretations in the action of hastisetae against vertebrates. Furthermore, possible implications to the systematics of skin beetles are proposed based on the results of the study. Abstract Hastisetae are modified setae typical of Dermestidae Megatominae and are a primary defensive tool of both larvae and pupae against invertebrates and possibly vertebrates. Given their unique morphological features, hastisetae have recently been suggested as an additional character useful for larvae identification and possible source of information to clarify the systematics of Megatominae. Hastisetae are also recognized as important contaminants of stored products, work and living environment; in particular, the exposure to hastisetae seems to cause allergic reactions and the insurgence of skin rashes, asthma, conjunctivitis, and digestive system inflammation in humans. Starting from these basic concepts, the present paper provides a detailed description of the hastisetae of some Megatominae. Fine morphology of external and internal microstructures of the hastisetae is shown and compared at the genus level. The insertion on integument, the pedicel, the shaft, and the apical head are illustrated in detail, and the first observations of active defensive behavior based on hastisetae are recorded and presented. Possible implications to the systematics of skin beetles are proposed based on the results of the study.
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21
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Kannan M, Elango K, Kalyanasundaram M, Govindaraju K. Ultra-structural and physico-chemical characterization of eggs and egg hairs (setae) of the new invasive pest, fall armyworm, Spodoptera frugiperda (J. E. Smith) in India: A first report. Microsc Res Tech 2021; 84:1422-1430. [PMID: 33448098 DOI: 10.1002/jemt.23698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/31/2020] [Accepted: 12/27/2020] [Indexed: 11/08/2022]
Abstract
In this study, we report first time in India on the morphology, ultra-architectural pattern of the chorion in the egg and egg hair (setae). Further, physico-chemical characterizations of egg hairs (setae) were studied in the new invasive pest, fall armyworm, Spodoptera frugiperda. The egg is dome shaped with flattened base and curves upward to a broadly rounded point at the apex. HR-SEM micrographs revealed the surface ultrastructure of eggs chorion and shows structural elements of a marked rosette of petals surround the micropyle followed by micropylar rosette region around the micropyle plate. There was a small single micropylar opening along with 9 micropylar rosette cells and 13 micropylar rosette zones present near to the micropylar pit. In the egg the first order ribs were absent, but around 58-60 numbers of second order ribs were present. All the ventral and lateral cells of the eggs are connected by 19-22 cross striae and not forming a grid pattern, but joints with the longitudinal ribs at several of angles and totally 1,277-1,495 convex cells present at the egg's surface. The physico-chemical characteristics of egg hairs were studied using Fourier transform infrared (FT-IR) and thermogravimetric analysis (TGA) analysis. TGA results show that three weight losses occurred at 142, 418, and 880°C, respectively. FT-IR confirms the presence of amides, sulfoxide, and nitro compounds in egg hairs (setae).
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Affiliation(s)
- Malaichamy Kannan
- Department of Nano Science and Technology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Kolanthasamy Elango
- Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, India
| | | | - Kasivelu Govindaraju
- Centre for Ocean Research (DST-FIST Sponsored Centre), Sathyabama Institute of Science and Technology, Chennai, India
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22
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ŞAHİN A, AVCI Hİ, ÇAM T, ÖZPINAR A. Egg parasitoids of Thaumetopoea pityocampa (Den & Schiff.) (Lepidoptera: Thaumetopoeidae) and natural effectiveness in Terzioğlu Campus (Çanakkale). TÜRKIYE BIYOLOJIK MÜCADELE DERGISI 2020; 11:199-211. [DOI: 10.31019/tbmd.748335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The study was conducted in the natural forest area in Terzioğlu campus of Çanakkale Onsekiz Mart University in 2018. The purpose of the study was to determine the natural effectiveness of the egg parasitoids of Thaumetopoea pityocampa (Den & Schiff.) on red pines. Eggs collected in September and October were transferred into glass tubes, then they were placed in a climate chamber with 24±1Cº temperature and 60-70% r.h. Eggs were checked daily and emerged adults were transferred to new glass tubes to examine adult longevity. Total number of egg batches was 72 with a mean number of 250.27 eggs on each batch, and parasitism rate of eggs was 18.16% (1.13%-97.32%) from a total of 18018 eggs. Ratio of the species were 26% Anastatus bifasciatus Geoffroy, 32% Baryscapus servadeii Geoffroy and 42% Ooencrytus pityocampae Mercet. In 24±1Cº tempreature and 60-70% r.h., adult longevities of O. pityocampae, B. servadeii and A. bifasciatus were determined as 18.77, 8.46 and 8.85 days, respectively.
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Affiliation(s)
- Ali ŞAHİN
- Çanakkale Onsekiz Mart Üniversitesi Ziraat Fakültesi Bitki Koruma Bölümü
| | - Halil İbrahim AVCI
- Çanakkale Onsekiz Mart Üniversitesi Ziraat Fakültesi Bitki Koruma Bölümü
| | - Talha ÇAM
- Çanakkale Onsekiz Mart Üniversitesi Ziraat Fakültesi Bitki Koruma Bölümü
| | - Ali ÖZPINAR
- Çanakkale Onsekiz Mart Üniversitesi Ziraat Fakültesi Bitki Koruma Bölümü
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Hauke TJ, Herzig V. Love bites - Do venomous arachnids make safe pets? Toxicon 2020; 190:65-72. [PMID: 33307110 DOI: 10.1016/j.toxicon.2020.12.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/30/2020] [Accepted: 12/06/2020] [Indexed: 12/21/2022]
Abstract
With a global estimate of tens of thousands of arachnid enthusiasts, spiders and scorpions are gaining increasing popularity as pets in industrialised countries in Europe, Northern America and Asia. As most spiders and all scorpions are venomous and due to their mostly negative image in the public media, several governments are already considering introducing legislation to regulate the domestic care of potentially dangerous captive animals. We aimed to investigate the circumstances and effects of exposure to arachnids kept in captivity. Thus, we collected and analysed data from 354 self-reported bites and stings attributed to pet arachnids. Our data revealed that on average there were less than 20 recorded envenomations per year with ~90% preventable by due care. We also categorized the severity of the resulting symptoms and found that the vast majority of symptoms were either local (60.7%) or minor (32.8%), 5.4% were asymptomatic, only 1.1% were severe and no fatalities were recorded. Based on our database of bite and sting reports, we performed a risk assessment for arachnid pet ownership and concluded that, with the proper care, arachnids can be safely kept as pets and pose a lower risk than many other recreational activities.
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Affiliation(s)
| | - Volker Herzig
- GeneCology Research Centre, School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, QLD, 4556, Australia.
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24
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Orozco-Flores AA, Valadez-Lira JA, Covarrubias-Cárdenas KE, Pérez-Trujillo JJ, Gomez-Flores R, Caballero-Hernández D, Tamez-Guerra R, Rodríguez-Padilla C, Tamez-Guerra P. In vitro antitumor, pro-inflammatory, and pro-coagulant activities of Megalopyge opercularis J.E. Smith hemolymph and spine venom. Sci Rep 2020; 10:18395. [PMID: 33110124 PMCID: PMC7592054 DOI: 10.1038/s41598-020-75231-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 10/08/2020] [Indexed: 11/29/2022] Open
Abstract
Contact with stinging spines venom from several Lepidoptera larvae may result in skin lesions. In Mexico, envenomation outbreaks caused by Megalopyge opercularis were reported between 2015 and 2016. The aim of this study was to identify the venomous caterpillars in Nuevo Leon, Mexico and evaluate several biological activities of their hemolymph (HEV) and spine setae (SSV) venoms. M. opercularis was identified by cytochrome oxidase subunit (COI) designed primers. HEV and SSV extracts cytotoxic activity was assessed on the L5178Y-R lymphoma cell line. For apoptotic cells number and apoptosis, cells were stained with acridine orange/ethidium bromide and validated by DNA fragmentation. Human peripheral blood mononuclear cells (hPBMC) cytokine response to the extracts was measured by the cytometric bead array assay. Extracts effect on pro-coagulation activity on human plasma was also evaluated. HEV and SSV extracts significantly inhibited (p < 0.01) up to 63% L5178Y-R tumor cell growth at 125–500 µg/mL, as compared with 43% of Vincristine. About 79% extracts-treated tumor cells death was caused by apoptosis. Extracts stimulated (p < 0.01) up to 60% proliferation of resident murine lymphocytes, upregulated IL-1β, IL-6, IL-8, and TNF-α production by hPBMC, and showed potent pro-coagulant effects. The pharmacological relevance of these venoms is discussed.
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Affiliation(s)
- Alonso A Orozco-Flores
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | - José A Valadez-Lira
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | - Karina E Covarrubias-Cárdenas
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | | | - Ricardo Gomez-Flores
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | - Diana Caballero-Hernández
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | - Reyes Tamez-Guerra
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | - Cristina Rodríguez-Padilla
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico
| | - Patricia Tamez-Guerra
- Departamento de Microbiología E Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), Cd. Universitaria, AP. 46-F., 66455, San Nicolás de los Garza, NL, Mexico.
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Panzer R, Krebs S. Mites, caterpillars and moths. J Dtsch Dermatol Ges 2020; 18:867-880. [PMID: 32776473 DOI: 10.1111/ddg.14207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 06/11/2020] [Indexed: 11/29/2022]
Abstract
Besides conditions such as scabies and hypersensitivity to house dust mites, other diseases caused by mites and caterpillars tend to be more uncommon in everyday practice. Nevertheless, there is a broad spectrum of medically relevant disorders associated with these arthropods. Mites may act as parasites that infect or colonize the skin (e.g., scabies, pseudoscabies, demodicosis) or they may pierce the host's skin and feed on tissue fluid and blood (trombiculosis). In the latter case, they also play a role as vectors transmitting Orientia tsutsugamushi, the pathogen that causes Tsutsugamushi fever. In addition to house dust mites, storage mites, too, are characterized by their allergenic potential. The terms erucism and lepidopterism are used for the various diseases caused by caterpillars and moths. Both terms are not used consistently. With respect to pathogenesis, various mechanisms have been described, including type I and type IV hypersensitivity as well as irritant and toxin-induced reactions. In Germany, skin reactions following exposure to the hairs of oak processionary caterpillars are particularly common. Extracutaneous manifestations including nausea, vomiting, hemorrhage, arthropathy or even life-threatening reactions have been reported in association with certain exotic species. Some species act as parasites by feeding on blood or tears. As natural silk can cause immediate and delayed-type hypersensitivity reactions, workers in the silk industry may develop allergic asthma, rhinitis, or conjunctivitis. Consumption of silkworm pupae is associated with the risk of food allergy.
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Affiliation(s)
- Rüdiger Panzer
- Department of Dermatology and Venereology, University Medical Center, Rostock, Germany
| | - Susanne Krebs
- Department of Dermatology and Venereology, University Medical Center, Rostock, Germany
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Panzer R, Krebs S. Milben, Raupen und Falter. J Dtsch Dermatol Ges 2020; 18:867-882. [DOI: 10.1111/ddg.14207_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 06/11/2020] [Indexed: 11/27/2022]
Affiliation(s)
- Rüdiger Panzer
- Klinik und Poliklinik für Dermatologie und Venerologie Universitätsmedizin Rostock
| | - Susanne Krebs
- Klinik und Poliklinik für Dermatologie und Venerologie Universitätsmedizin Rostock
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Caterpillar Venom: A Health Hazard of the 21st Century. Biomedicines 2020; 8:biomedicines8060143. [PMID: 32486237 PMCID: PMC7345192 DOI: 10.3390/biomedicines8060143] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/22/2020] [Accepted: 05/24/2020] [Indexed: 12/24/2022] Open
Abstract
Caterpillar envenomation is a global health threat in the 21st century. Every direct or indirect contact with the urticating hairs of a caterpillar results in clinical manifestations ranging from local dermatitis symptoms to potentially life-threatening systemic effects. This is mainly due to the action of bioactive components in the venom that interfere with targets in the human body. The problem is that doctors are limited to relieve symptoms, since an effective treatment is still lacking. Only for Lonomia species an effective antivenom does exist. The health and economical damage are an underestimated problem and will be even more of a concern in the future. For some caterpillar species, the venom composition has been the subject of investigation, while for many others it remains unknown. Moreover, the targets involved in the pathophysiology are poorly understood. This review aims to give an overview of the knowledge we have today on the venom composition of different caterpillar species along with their pharmacological targets. Epidemiology, mode of action, clinical time course and treatments are also addressed. Finally, we briefly discuss the future perspectives that may open the doors for future research in the world of caterpillar toxins to find an adequate treatment.
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de Boer JG, Harvey JA. Range-Expansion in Processionary Moths and Biological Control. INSECTS 2020; 11:E267. [PMID: 32353938 PMCID: PMC7290706 DOI: 10.3390/insects11050267] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 11/17/2022]
Abstract
Global climate change is resulting in a wide range of biotic responses, including changes in diel activity and seasonal phenology patterns, range shifts polewards in each hemisphere and/or to higher elevations, and altered intensity and frequency of interactions between species in ecosystems. Oak (Thaumetopoea processionea) and pine (T. pityocampa) processionary moths (hereafter OPM and PPM, respectively) are thermophilic species that are native to central and southern Europe. The larvae of both species are gregarious and produce large silken 'nests' that they use to congregate when not feeding. During outbreaks, processionary caterpillars are capable of stripping foliage from their food plants (oak and pine trees), generating considerable economic damage. Moreover, the third to last instar caterpillars of both species produce copious hairs as a means of defence against natural enemies, including both vertebrate and invertebrate predators, and parasitoids. These hairs contain the toxin thaumetopoein that causes strong allergic reactions when it comes into contact with human skin or other membranes. In response to a warming climate, PPM is expanding its range northwards, while OPM outbreaks are increasing in frequency and intensity, particularly in northern Germany, the Netherlands, and southern U.K., where it was either absent or rare previously. Here, we discuss how warming and escape from co-evolved natural enemies has benefitted both species, and suggest possible strategies for biological control.
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Affiliation(s)
- Jetske G de Boer
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendaalsesteeg 10, 6708 PB Wageningen, The Netherlands
| | - Jeffrey A Harvey
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Droevendaalsesteeg 10, 6708 PB Wageningen, The Netherlands
- Department of Ecological Sciences, Section Animal Ecology, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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Ruzzier E, Kadej M, Battisti A. Occurrence, ecological function and medical importance of dermestid beetle hastisetae. PeerJ 2020; 8:e8340. [PMID: 32002326 PMCID: PMC6983295 DOI: 10.7717/peerj.8340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 12/03/2019] [Indexed: 11/20/2022] Open
Abstract
Hastisetae are a specific group of detachable setae characterizing the larvae of Megatominae (Coleoptera: Dermestidae), commonly known as carpet and khapra beetles. These setae are located on both thoracic and abdominal tergites and they are the primary defense of the larva against invertebrate predators. According to previous studies, the main purpose of hastisetae is to work as a mechanical obstacle, but they are also capable to block and kill a predator. Hastisetae, single or aggregate, function as an extremely efficient mechanical trap, based on an entangling mechanism of cuticular structures (spines and hairs) and body appendages (antennae, legs and mouthparts). It is believed that this defensive system evolved primarily to contrast predation by invertebrates, however it has been observed that hastisetae may affect vertebrates as well. Although information on the impacts of vertebrate predators of the beetles is lacking, hastisetae have been shown to be a possible threat for human health as an important contaminant of stored products (food and fabric), work and living environment. Review of past and recent literature on dermestid larvae has revealed that despite these structures indicated as one of the distinctive characters in species identification, very little is known about their ultrastructure, evolution and mechanism of action. In the present work, we will provide the state of knowledge on hastisetae in Dermestidae and we will present and discuss future research perspectives intended to bridge the existing knowledge gaps.
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Affiliation(s)
- Enrico Ruzzier
- Department of Agronomy, Food, Natural Resources, Animals and the Environment (DAFNAE), Università degli Studi di Padova, Padova, Italy
| | - Marcin Kadej
- Department of Invertebrate Biology, Evolution and Conservation, University of Wrocław, Wrocław, Poland
| | - Andrea Battisti
- Department of Agronomy, Food, Natural Resources, Animals and the Environment (DAFNAE), Università degli Studi di Padova, Padova, Italy
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Uemura M, Perkins LE, Zalucki MP, Battisti A. Movement behaviour of two social urticating caterpillars in opposite hemispheres. MOVEMENT ECOLOGY 2020; 8:4. [PMID: 32021689 PMCID: PMC6995145 DOI: 10.1186/s40462-020-0189-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 01/02/2020] [Indexed: 05/06/2023]
Abstract
BACKGROUND Investigating movement ecology of organisms has economic, societal, and conservation benefits. Larval movement of insects for example, plays many significant ecological roles, and with the expansion of the human population and development, encounters and conflicts with insects have increased. Urticating caterpillars are a health concern to people and animals, especially when they disperse in a gregarious and synchronised manner in areas frequented by humans. Ochrogaster lunifer and Thaumetopoea pityocampa from the southern and northern hemispheres respectively, are two geographically-isolated species of moth with similar gregarious urticating caterpillars that can outbreak causing defoliation and medical issues. METHODS Each year from March to May, O. lunifer and T. pityocampa caterpillars leave their nesting sites and form head-to-tail processions on the ground in search of pupation sites. This pre-pupation procession behaviour and its associated risk of human contact with O. lunifer and T. pityocampa caterpillars were studied and compared in Australia and Italy, respectively. The distance, duration, orientation and response to visible light of the pre-pupation processions were studied in both species to determine general patterns. RESULTS In the morning, O. lunifer and T. pityocampa processions travelled on average 40 and 16 m per day from the nest in 153 and 223 min respectively, in search for potential pupation sites. Ochrogaster lunifer pre-pupation processions travelled generally to the north or south when leaving the nest, as was their final orientation to the bivouac/pupation site. Whereas T. pityocampa processions had no preference in orientation. Ochrogaster lunifer and T. pityocampa pre-pupation processions travelled towards the darker and the lighter areas of the environment, respectively. During our observations, 27% of O. lunifer and 44% of T. pityocampa processions had contact with humans driving, cycling or walking. CONCLUSIONS The amount of human contact is surprising and alarming, because of the serious health implications they cause to humans and animals. The processionary dispersal on the ground risks further spread of urticating hairs that can be easily detached, and particular during inadvertent contact. Our limited sample size of T. pityocampa processions may benefit from more observations to make conclusive remarks on their pre-pupation behaviour. Understanding the movement behaviour of O. lunifer and T. pityocampa pre-pupation processions around populated areas is crucial for predicting exposure risk and application of management strategies.
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Affiliation(s)
- Mizuki Uemura
- Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova, 35020 Legnaro, Padova, Italy
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland 4072 Australia
| | - Lynda E. Perkins
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland 4072 Australia
| | - Myron P. Zalucki
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland 4072 Australia
| | - Andrea Battisti
- Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova, 35020 Legnaro, Padova, Italy
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Avtzis DN, Schebeck M, Petsopoulos D, Memtsas GI, Stauffer C, Kavallieratos NG, Athanassiou CG, Boukouvala MC. New Data on the Range Expansion of the Thaumetopoea pityocampa (Lepidoptera: Notodontidae) 'ENA clade' in Greece: The Role of Bacterial Endosymbionts. JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:2761-2766. [PMID: 31550003 DOI: 10.1093/jee/toz216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Indexed: 06/10/2023]
Abstract
The pine processionary moth, Thaumetopoea pityocampa (Denis and Schiffermüller), is an important insect in the Mediterranean region, as it defoliates pines and its urticating hairs can cause allergic reactions in humans and animals. Moreover, this species exhibits an interesting genetic structure as recently a distinct East-North African mtDNA lineage ('ENA clade') has been described. This clade has been recently detected in Greek populations where it has currently expanded its range by replacing the 'endemic' T. pityocampa lineages. Here, we report new data on the rapid spread of 'ENA clade' in the Greek island Evoia in only a few years. As the underlying mechanisms of the 'ENA clade' range expansion has not been studied so far, we screened T. pityocampa for an infection with the heritable bacterial endosymbionts Wolbachia (Bacteria: Anaplasmataceae), Cardinium (Bacteria: Bacteroidaceae), Rickettsia (Bacteria: Rickettsiaceae) and Spiroplasma (Bacteria: Spiroplasmataceae). These bacteria can manipulate the reproduction of infected hosts, something that could potentially explain the rapid spread of 'ENA clade' lineage. Therefore, we screened 28 individuals that exhibited T. pityocampa 'ENA clade' and 'endemic' T. pityocampa haplotypes from nine populations scattered all over Greece. None of them was infected with any of the four endosymbionts, suggesting that these bacteria do not cause reproductive manipulations in T. pityocampa lineages and, thus, other factors should be explored in future research efforts.
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Affiliation(s)
- Dimitrios N Avtzis
- Laboratory of Forest Entomology, Forest Research Institute, Hellenic Agricultural Organization Demeter, Vassilika, Thessaloniki, Greece
| | - Martin Schebeck
- Department of Forest and Soil Sciences, BOKU, University of Natural Resources and Life Sciences, Vienna, Peter-Jordan-Strasse 82/I, Vienna, Austria
| | - Dimitrios Petsopoulos
- Laboratory of Forest Entomology, Forest Research Institute, Hellenic Agricultural Organization Demeter, Vassilika, Thessaloniki, Greece
| | - George I Memtsas
- Laboratory of Forest Entomology, Forest Research Institute, Hellenic Agricultural Organization Demeter, Vassilika, Thessaloniki, Greece
| | - Christian Stauffer
- Department of Forest and Soil Sciences, BOKU, University of Natural Resources and Life Sciences, Vienna, Peter-Jordan-Strasse 82/I, Vienna, Austria
| | - Nickolas G Kavallieratos
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Attica, Greece
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
| | - Christos G Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnissia, Greece
| | - Maria C Boukouvala
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Attica, Greece
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
- Laboratory of Organic Chemistry, Department of Chemistry, University of Ioannina, Panepistimioupolis, Ioannina, Greece
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Perkins LE, Cribb BW, Pagendam DE, Zalucki MP. Variation in Morphology and Airborne Dispersal of the Urticating Apparatus of Ochrogaster lunifer (Lepidoptera: Notodontidae), an Australian Processionary Caterpillar, and Implications for Livestock and Humans. JOURNAL OF INSECT SCIENCE (ONLINE) 2019; 19:5634379. [PMID: 31782508 PMCID: PMC6883397 DOI: 10.1093/jisesa/iez112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Indexed: 05/05/2023]
Abstract
True setae borne on the abdominal tergites of Ochrogaster lunifer Herrich-Schӓffer caterpillars are the agents of an irritating contact dermatitis, osteomyelitis, ophthalmia, and severe allergic reactions in humans, and are the cause of Equine Amnionitis and Fetal Loss in Australia. The setae are detached and readily dislodge from the integument whereby they disperse throughout the environment. To better understand the true setae of O. lunifer as agents of medical and veterinary concern, we studied their characteristics and distance dispersed. Whereas members of the European Thaumetopoeinae have been widely studied, their southern-hemisphere counterparts such as O. lunifer are not well known despite their harmfulness and known medical and veterinary importance. The caterpillar's investment in true setae increased with age and size, and two distinct size classes co-occurred in setae fields. A previously undescribed morphological type of true seta was found on the first abdominal segment. All true setae were calculated to travel long distances in the air even under light breeze conditions. Our results show there is a high risk of exposure to airborne urticating setae within 100 m of elevated caterpillar activity, and a likely risk of exposure for some kilometers in the direction of the prevailing breeze. This information should be used to inform management strategies in areas where urticating processionary caterpillars are active, and especially during periods of an outbreak.
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Affiliation(s)
- Lynda E Perkins
- School of Biological Science, The University of Queensland, Brisbane, QLD, Australia
| | - Bronwen W Cribb
- School of Biological Science, The University of Queensland, Brisbane, QLD, Australia
- Centre for Microscopy & Microanalysis, The University of Queensland, Brisbane, QLD, Australia
| | | | - Myron P Zalucki
- School of Biological Science, The University of Queensland, Brisbane, QLD, Australia
- Corresponding author, e-mail:
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Godefroid M, Meurisse N, Groenen F, Kerdelhué C, Rossi JP. Current and future distribution of the invasive oak processionary moth. Biol Invasions 2019. [DOI: 10.1007/s10530-019-02108-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Lin Y, Lin R, Braby MF, Hsu Y. Evolution and losses of spines in slug caterpillars (Lepidoptera: Limacodidae). Ecol Evol 2019; 9:9827-9840. [PMID: 31534697 PMCID: PMC6745677 DOI: 10.1002/ece3.5524] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 07/14/2019] [Accepted: 07/17/2019] [Indexed: 12/18/2022] Open
Abstract
Larvae of the cosmopolitan family Limacodidae, commonly known as "slug" caterpillars, are well known because of the widespread occurrence of spines with urticating properties, a morpho-chemical adaptive trait that has been demonstrated to protect the larvae from natural enemies. However, while most species are armed with rows of spines ("nettle" caterpillars), slug caterpillars are morphologically diverse with some species lacking spines and thus are nonstinging. It has been demonstrated that the evolution of spines in slug caterpillars may have a single origin and that this trait is possibly derived from nonstinging slug caterpillars, but these conclusions were based on limited sampling of mainly New World taxa; thus, the evolution of spines and other traits within the family remains unresolved. Here, we analyze morphological variation in slug caterpillars within an evolutionary framework to determine character evolution of spines with samples from Asia, Australia, North America, and South America. The phylogeny of the Limacodidae was reconstructed based on a multigene dataset comprising five molecular markers (5.6 Kbp: COI, 28S, 18S, EF-1α, and wingless) representing 45 species from 40 genera and eight outgroups. Based on this phylogeny, we infer that limacodids evolved from a common ancestor in which the larval type possessed spines, and then slug caterpillars without spines evolved independently multiple times in different continents. While larvae with spines are well adapted to avoiding generalist predators, our results imply that larvae without spines may be suited to different ecological niches. Systematic relationships of our dataset indicate six major lineages, several of which have not previously been identified.
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Affiliation(s)
- Yu‐Chi Lin
- Department of Life ScienceNational Taiwan Normal UniversityTaipeiTaiwan
| | - Rung‐Juen Lin
- Department of Life ScienceNational Taiwan Normal UniversityTaipeiTaiwan
| | - Michael F. Braby
- Division of Ecology and EvolutionResearch School of BiologyThe Australian National UniversityActonACTAustralia
- The Australian National Insect CollectionNational Research Collections AustraliaCanberraACTAustralia
| | - Yu‐Feng Hsu
- Department of Life ScienceNational Taiwan Normal UniversityTaipeiTaiwan
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Baik S, Lee HJ, Kim DW, Kim JW, Lee Y, Pang C. Bioinspired Adhesive Architectures: From Skin Patch to Integrated Bioelectronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1803309. [PMID: 30773697 DOI: 10.1002/adma.201803309] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/31/2018] [Indexed: 05/21/2023]
Abstract
The attachment phenomena of various hierarchical architectures found in nature have extensively drawn attention for developing highly biocompatible adhesive on skin or wet inner organs without any chemical glue. Structural adhesive systems have become important to address the issues of human-machine interactions by smart outer/inner organ-attachable devices for diagnosis and therapy. Here, advances in designs of biologically inspired adhesive architectures are reviewed in terms of distinct structural properties, attachment mechanisms to biosurfaces by physical interactions, and noteworthy fabrication methods. Recent demonstrations of bioinspired adhesive architectures as adhesive layers for medical applications from skin patches to multifunctional bioelectronics are presented. To conclude, current challenges and prospects on potential applications are also briefly discussed.
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Affiliation(s)
- Sangyul Baik
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Heon Joon Lee
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Da Wan Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Ji Won Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Youngkwan Lee
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Changhyun Pang
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
- SKKU Advanced Institute of Nanotechnology (SAINT), Samsung Advanced Institute for Health Science & Technology (SAIHST), Sungkyunkwan University (SKKU), Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
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Tarantula phylogenomics: A robust phylogeny of deep theraphosid clades inferred from transcriptome data sheds light on the prickly issue of urticating setae evolution. Mol Phylogenet Evol 2019; 140:106573. [PMID: 31374259 DOI: 10.1016/j.ympev.2019.106573] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 04/26/2019] [Accepted: 07/24/2019] [Indexed: 12/16/2022]
Abstract
Mygalomorph spiders of the family Theraphosidae, known to the broader public as tarantulas, are among the most recognizable arachnids on earth due to their large size and widespread distribution. Their use of urticating setae is a notable adaptation that has evolved exclusively in certain New World theraphosids. Thus far, the evolutionary history of Theraphosidae remains poorly understood; theraphosid systematics still largely relies on morphological datasets, which suffer from high degrees of homoplasy, and traditional Sanger sequencing of preselected genes failed to provide strong support for supra-generic clades. In this study, we provide the first robust phylogenetic hypothesis of theraphosid evolution inferred from transcriptome data. A core ortholog approach was used to generate a phylogeny from 2460 orthologous genes across 25 theraphosid genera, representing all of the major theraphosid subfamilies, except Selenogyrinae. Our phylogeny recovers an unprecedented monophyletic group that comprises the vast majority of New World theraphosid subfamilies including Aviculariinae, Schismatothelinae and Theraphosinae. Concurrently, we provide additional evidence for the integrity of questionable subfamilies, such as Poecilotheriinae and Psalmopoeinae, and support the non-monophyly of Ischnocolinae. The deeper relationships between almost all subfamilies are confidently inferred. We also used our phylogeny in tandem with published morphological data to perform ancestral state analyses on urticating setae, and contextualize our reconstructions with emphasis on the complex evolutionary history of the trait.
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Singh A, Behera UC, Agrawal H. Intra-lenticular caterpillar seta in ophthalmia nodosa. Eur J Ophthalmol 2019; 31:NP109-NP111. [PMID: 31282202 DOI: 10.1177/1120672119858899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE To report the clinical course of ophthalmia nodosa with a retained lenticular seta misdiagnosed and treated as non-infectious posterior uveitis for 7 consecutive years. METHODS Meticulous clinical examination led to discovery of the caterpillar seta embedded in the crystalline lens and the intravitreal setae. RESULTS Lens-sparing pars plana vitrectomy and removal of free-floating vitreal seta resulted in complete resolution of vitritis and uveitis. CONCLUSION Embedded seta within a clear lens may remain sequestered, and may be left untouched under close observation, precluding a clear lens extraction in such patients.
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Affiliation(s)
- Arshi Singh
- Retina-Vitreous Service, L V Prasad Eye Institute, Bhubaneswar, India
| | | | - Hitesh Agrawal
- Retina-Vitreous Service, L V Prasad Eye Institute, Bhubaneswar, India
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Poinar G, Vega FE. Poisonous setae on a Baltic amber caterpillar. ARTHROPOD STRUCTURE & DEVELOPMENT 2019; 51:37-40. [PMID: 31376469 DOI: 10.1016/j.asd.2019.100879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 06/10/2023]
Abstract
The knobbed setae on a small caterpillar in 45-55 million years old [Eocene] Baltic amber were studied and characterized as urticating, with evidence of liquid release implying the production of poisons. It is presumed that the caterpillar had been disturbed just prior to falling into the resin, as some of its setae showed defensive responses. The swollen tips of the setae are equipped with "trip hairs" and when disturbed, the tips release liquid deposits, some of which contain rod-like bodies. These setal responses to a disturbance are the first report of poisonous setal defense mechanisms in a fossil insect.
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Affiliation(s)
- George Poinar
- Department of Integrative Biology, Oregon State University, Corvallis, OR, 97331, USA
| | - Fernando E Vega
- Sustainable Perennial Crops Laboratory, U. S. Department of Agriculture, Agricultural Research Service, Beltsville, MD, 20705, USA.
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Ciminera M, Auger-Rozenberg MA, Caron H, Herrera M, Scotti-Saintagne C, Scotti I, Tysklind N, Roques A. Genetic Variation and Differentiation of Hylesia metabus (Lepidoptera: Saturniidae): Moths of Public Health Importance in French Guiana and in Venezuela. JOURNAL OF MEDICAL ENTOMOLOGY 2019; 56:137-148. [PMID: 30272198 DOI: 10.1093/jme/tjy167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Indexed: 06/08/2023]
Abstract
Hylesia moths impact human health in South America, inducing epidemic outbreaks of lepidopterism, a puriginous dermatitis caused by the urticating properties of females' abdominal setae. The classification of the Hylesia genus is complex, owing to its high diversity in Amazonia, high intraspecific morphological variance, and lack of interspecific diagnostic traits which may hide cryptic species. Outbreaks of Hylesia metabus have been considered responsible for the intense outbreaks of lepidopterism in Venezuela and French Guiana since the C20, however, little is known about genetic variability throughout the species range, which is instrumental for establishing control strategies on H. metabus. Seven microsatellites and mitochondrial gene markers were analyzed from Hylesia moths collected from two major lepidopterism outbreak South American regions. The mitochondrial gene sequences contained significant genetic variation, revealing a single, widespread, polymorphic species with distinct clusters, possibly corresponding to populations evolving in isolation. The microsatellite markers validated the mitochondrial results, and suggest the presence of three populations: one in Venezuela, and two in French Guiana. All moths sampled during outbreak events in French Guiana were assigned to a single coastal population. The causes and implications of this finding require further research.
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Affiliation(s)
- Marina Ciminera
- CNRS, UMR0745 Ecologie des Forêts de Guyane (EcoFoG), AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane, Campus Agronomique, Avenue de France, Kourou Cedex, France
| | | | - Henri Caron
- INRA, UMR0745 Ecologie des Forêts de Guyane (EcoFoG), AgroParisTech, Cirad, CNRS, Université des Antilles, Université de Guyane, Campus Agronomique, Avenue de France, Kourou Cedex, France
| | - Melfran Herrera
- Coordinación de Vigilancia Entomológica, Gerencia de Saneamiento Ambiental y Control de Endemias, FUNDASALUD, Carúpano, Estado Sucre, Venezuela
| | | | - Ivan Scotti
- INRA, UR629, Unité de Recherche Ecologie des forêts méditerranéennes, Avignon, France
| | - Niklas Tysklind
- INRA, UMR0745 Ecologie des Forêts de Guyane (EcoFoG), AgroParisTech, Cirad, CNRS, Université des Antilles, Université de Guyane, Campus Agronomique, Avenue de France, Kourou Cedex, France
| | - Alain Roques
- INRA, UR633, Zoologie Forestière, Orléans, France
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40
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Villas-Boas IM, Bonfá G, Tambourgi DV. Venomous caterpillars: From inoculation apparatus to venom composition and envenomation. Toxicon 2018; 153:39-52. [PMID: 30145232 DOI: 10.1016/j.toxicon.2018.08.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 07/27/2018] [Accepted: 08/20/2018] [Indexed: 11/16/2022]
Abstract
Envenomation by the larval or pupal stages of moths occurs when the victim presses their hairs. They penetrate the subcutaneous tissue, releasing toxins such as proteolytic enzymes, histamine and other pro-inflammatory substances. Cutaneous reactions, including severe pain, oedema and erythema are frequent local manifestations of caterpillar envenomation, but, in some cases, the reactions can evolve into vesicles, bullae, erosions, petechiae, superficial skin necrosis and ulcerations. Alternatively, some individual can develop allergic reactions, renal failure, osteochondritis, deformity and immobilization of the affected joints and intracerebral bleeding. Caterpillars produce venom to protect themselves from predators; contact with humans is accidental and deserves close attention. Their venoms have not been well studied, except for toxins from some few species. The present review brings together data on venomous caterpillars of moths, primarily addressing the available literature on diversity among the different families that cause accident in humans, the structures used in their defense, venom composition and clinical aspects of the envenomations. Understanding the molecular mechanisms of action of caterpillars' toxins may lead to the development of more adequate treatments.
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Affiliation(s)
- Isadora Maria Villas-Boas
- Immunochemistry Laboratory, Butantan Institute, Av. Vital Brazil, 1500, 05503-900, São Paulo, SP, Brazil
| | - Giuliano Bonfá
- Immunochemistry Laboratory, Butantan Institute, Av. Vital Brazil, 1500, 05503-900, São Paulo, SP, Brazil
| | - Denise V Tambourgi
- Immunochemistry Laboratory, Butantan Institute, Av. Vital Brazil, 1500, 05503-900, São Paulo, SP, Brazil.
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Avtzis DN, Petsopoulos D, Memtsas GI, Kavallieratos NG, Athanassiou CG, Boukouvala MC. Revisiting the Distribution of Thaumetopoea pityocampa (Lepidoptera: Notodontidae) and T. pityocampa ENA Clade in Greece. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:1256-1260. [PMID: 29562356 DOI: 10.1093/jee/toy047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Indexed: 06/08/2023]
Abstract
In the present work, we sampled individuals of the processionary pine moth, Thaumetopoea pityocampa (Denis and Schiffermüller; Lepidoptera: Notodontidae) from different areas of Greece between 2014 and 2016. These samples were sequenced for a 760-bp long mtDNA COI locus and the haplotypes retrieved clearly showed that the occurrence of T. pityocampa in Greece is being considerably restricted, with only 8 individuals out of the 221 exhibiting T. pityocampa haplotypes and the rest being identified as T. pityocampa ENA clade haplotypes. To that, one haplotype in particular exhibited the highest abundance and broadest geographic distribution, occurring both in mainland and on islands. Our data suggest a rather recent and rapid population expansion of the ENA clade in Greece and a concomitant recent displacement of T. pityocampa. It thus seems that the relation between T. pityocampa and T. pityocampa ENA clade needs to be further and thorough analyzed before the taxonomic status of T. pityocampa ENA clade can be concluded with confidence.
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Affiliation(s)
- Dimitrios N Avtzis
- Laboratory of Forest Entomology, Forest Research Institute, Hellenic Agricultural Organization Demeter, Vassilika, Thessaloniki, Greece
| | - Dimitrios Petsopoulos
- Laboratory of Forest Entomology, Forest Research Institute, Hellenic Agricultural Organization Demeter, Vassilika, Thessaloniki, Greece
| | - George I Memtsas
- Laboratory of Forest Entomology, Forest Research Institute, Hellenic Agricultural Organization Demeter, Vassilika, Thessaloniki, Greece
| | - Nickolas G Kavallieratos
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Attica, Greece
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
| | - Christos G Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnissia, Greece
| | - Maria C Boukouvala
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Attica, Greece
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
- Laboratory of Organic Chemistry, Department of Chemistry, University of Ioannina, Panepistimioupolis, Ioannina, Greece
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Schroeder TBH, Houghtaling J, Wilts BD, Mayer M. It's Not a Bug, It's a Feature: Functional Materials in Insects. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1705322. [PMID: 29517829 DOI: 10.1002/adma.201705322] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/15/2017] [Indexed: 05/25/2023]
Abstract
Over the course of their wildly successful proliferation across the earth, the insects as a taxon have evolved enviable adaptations to their diverse habitats, which include adhesives, locomotor systems, hydrophobic surfaces, and sensors and actuators that transduce mechanical, acoustic, optical, thermal, and chemical signals. Insect-inspired designs currently appear in a range of contexts, including antireflective coatings, optical displays, and computing algorithms. However, as over one million distinct and highly specialized species of insects have colonized nearly all habitable regions on the planet, they still provide a largely untapped pool of unique problem-solving strategies. With the intent of providing materials scientists and engineers with a muse for the next generation of bioinspired materials, here, a selection of some of the most spectacular adaptations that insects have evolved is assembled and organized by function. The insects presented display dazzling optical properties as a result of natural photonic crystals, precise hierarchical patterns that span length scales from nanometers to millimeters, and formidable defense mechanisms that deploy an arsenal of chemical weaponry. Successful mimicry of these adaptations may facilitate technological solutions to as wide a range of problems as they solve in the insects that originated them.
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Affiliation(s)
- Thomas B H Schroeder
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI, 48109, USA
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Jared Houghtaling
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, MI, 48109, USA
| | - Bodo D Wilts
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Michael Mayer
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
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Gschloessl B, Dorkeld F, Berges H, Beydon G, Bouchez O, Branco M, Bretaudeau A, Burban C, Dubois E, Gauthier P, Lhuillier E, Nichols J, Nidelet S, Rocha S, Sauné L, Streiff R, Gautier M, Kerdelhué C. Draft genome and reference transcriptomic resources for the urticating pine defoliator Thaumetopoea pityocampa (Lepidoptera: Notodontidae). Mol Ecol Resour 2018; 18:602-619. [PMID: 29352511 DOI: 10.1111/1755-0998.12756] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 12/23/2017] [Accepted: 01/03/2018] [Indexed: 12/15/2022]
Abstract
The pine processionary moth Thaumetopoea pityocampa (Lepidoptera: Notodontidae) is the main pine defoliator in the Mediterranean region. Its urticating larvae cause severe human and animal health concerns in the invaded areas. This species shows a high phenotypic variability for various traits, such as phenology, fecundity and tolerance to extreme temperatures. This study presents the construction and analysis of extensive genomic and transcriptomic resources, which are an obligate prerequisite to understand their underlying genetic architecture. Using a well-studied population from Portugal with peculiar phenological characteristics, the karyotype was first determined and a first draft genome of 537 Mb total length was assembled into 68,292 scaffolds (N50 = 164 kb). From this genome assembly, 29,415 coding genes were predicted. To circumvent some limitations for fine-scale physical mapping of genomic regions of interest, a 3X coverage BAC library was also developed. In particular, 11 BACs from this library were individually sequenced to assess the assembly quality. Additionally, de novo transcriptomic resources were generated from various developmental stages sequenced with HiSeq and MiSeq Illumina technologies. The reads were de novo assembled into 62,376 and 63,175 transcripts, respectively. Then, a robust subset of the genome-predicted coding genes, the de novo transcriptome assemblies and previously published 454/Sanger data were clustered to obtain a high-quality and comprehensive reference transcriptome consisting of 29,701 bona fide unigenes. These sequences covered 99% of the cegma and 88% of the busco highly conserved eukaryotic genes and 84% of the busco arthropod gene set. Moreover, 90% of these transcripts could be localized on the draft genome. The described information is available via a genome annotation portal (http://bipaa.genouest.org/sp/thaumetopoea_pityocampa/).
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Affiliation(s)
- B Gschloessl
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - F Dorkeld
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - H Berges
- INRA-CNRGV, Castanet Tolosan Cedex, France
| | - G Beydon
- INRA-CNRGV, Castanet Tolosan Cedex, France
| | - O Bouchez
- INRA, US 1426, GeT-PlaGe, Genotoul, INRA Auzeville, Castanet Tolosan Cedex, France
| | - M Branco
- Forest Research Center (CEF), Instituto Superior de Agronomia (ISA), University of Lisbon (ULisboa), Lisboa, Portugal
| | - A Bretaudeau
- INRA, UMR Institut de Génétique, Environnement et Protection des Plantes (IGEPP), BioInformatics Platform for Agroecosystems Arthropods (BIPAA), Rennes, France.,INRIA, IRISA, GenOuest Core Facility, Rennes, France
| | - C Burban
- BIOGECO, INRA, Univ. Bordeaux, Cestas, France
| | - E Dubois
- Plateforme MGX-Montpellier GenomiX, c/o Institut de Génomique Fonctionnelle IGF-sud, UMR 5203 CNRS-U 661 INSERM-Université de Montpellier, Montpellier Cedex 05, France
| | - P Gauthier
- CBGP, IRD, CIRAD, INRA, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - E Lhuillier
- INRA, US 1426, GeT-PlaGe, Genotoul, INRA Auzeville, Castanet Tolosan Cedex, France
| | - J Nichols
- Edinburgh Genomics, Ashworth Laboratories, The University of Edinburgh, Edinburgh, UK
| | - S Nidelet
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France.,Plateforme MGX-Montpellier GenomiX, c/o Institut de Génomique Fonctionnelle IGF-sud, UMR 5203 CNRS-U 661 INSERM-Université de Montpellier, Montpellier Cedex 05, France
| | - S Rocha
- Forest Research Center (CEF), Instituto Superior de Agronomia (ISA), University of Lisbon (ULisboa), Lisboa, Portugal
| | - L Sauné
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - R Streiff
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - M Gautier
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
| | - C Kerdelhué
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ Montpellier, Montpellier, France
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Colacci M, Kavallieratos NG, Athanassiou CG, Boukouvala MC, Rumbos CI, Kontodimas DC, Pardo D, Sancho J, Benavent-Fernández E, Gálvez-Settier S, Sciarretta A, Trematerra P. Management of the Pine Processionary Moth, Thaumetopoea pityocampa (Lepidoptera: Thaumetopoeidae), in Urban and Suburban Areas: Trials With Trunk Barrier and Adhesive Barrier Trap Devices. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:227-238. [PMID: 29240941 DOI: 10.1093/jee/tox270] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Indexed: 06/07/2023]
Abstract
In urban and suburban areas larvae of the pine processionary moth, Thaumetopoea pityocampa (Denis and Schiffermüller), cause serious defoliation to Cedrus, Pinus, and Pseudotsuga trees and health problems to humans and domestic or farm animals by their urticating setae. In this study, we present the results of biennial trials (2015-2016) on the management of T. pityocampa infestations using commercial or LIFE-PISA prototype trunk barrier and adhesive trap devices in Greece (Attica and Volos), Spain (Valencia), and Italy (Molise). In Attica, for both 2015 and 2016, the commercial trunk barrier trap devices captured significantly more T. pityocampa wintering migrant larvae compared to the adhesive barrier trap devices, indicating their high capture capacity. The total performance of the trunk barriers trap devices was 99.8% in 2015 and 99.6% in 2016. In Volos and Valencia, no significant differences were recorded between captures in commercial and LIFE-PISA prototype trunk barrier trap devices. In the tests that were conducted in Molise, the commercial trunk barrier trap devices exhibited high effectiveness in capturing the wintering migrant larvae during their procession, before they reach the ground for pupation. Moreover, significantly fewer male adults were captured by pheromone trap devices during summer 2016 in comparison with 2015 in the experimental area. Similarly, significantly fewer nests were formed on the experimental area trees in winter 2016 and 2017 compared with 2015. Our results show the potential of the trunk barrier trap devices in the management of T. pityocampa numbers after long-term application in urban and suburban areas.
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Affiliation(s)
- Marco Colacci
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Via De Sanctis, Campobasso, Italy
| | - Nickolas G Kavallieratos
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Attica, Greece
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
| | - Christos G Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnissia, Greece
| | - Maria C Boukouvala
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Attica, Greece
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
- Laboratory of Organic Chemistry, Department of Chemistry, University of Ioannina, Panepistimioupolis, Ioannina, Greece
| | - Christos I Rumbos
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnissia, Greece
| | - Demetrius C Kontodimas
- Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
| | - David Pardo
- Technical Department, SANSAN PRODESING S.L., Pol. Industrial Los Vientos, C/Virazón 1 Náquera, Valencia, Spain
| | - José Sancho
- Technical Department, SANSAN PRODESING S.L., Pol. Industrial Los Vientos, C/Virazón 1 Náquera, Valencia, Spain
| | | | - Santiago Gálvez-Settier
- AIMPLAS, Plastics Technology Centre, València Parc Tecnològic, Gustave Eiffel, Paterna, Valencia, Spain
- General University Hospital Research Foundation, University General Hospital of Valencia, Avda Tres Cruces Valencia, Spain
| | - Andrea Sciarretta
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Via De Sanctis, Campobasso, Italy
| | - Pasquale Trematerra
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Via De Sanctis, Campobasso, Italy
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Morkin MI, Rifkin LM, Dang S, Baumal CR. TARANTULA HAIR ASSOCIATED PANUVEITIS TREATED WITH SUSTAINED-RELEASE INTRAVITREAL DEXAMETHASONE IMPLANT. Retin Cases Brief Rep 2018; 11:298-301. [PMID: 27472515 DOI: 10.1097/icb.0000000000000364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
PURPOSE To report a case of tarantula hair-induced panuveitis treated with sustained-release intravitreal dexamethasone implant and followed by sequential spectral domain optical coherence tomography imaging. METHODS Findings on clinical examination, anterior segment optical coherence tomography, corneal in vivo confocal microscopy, color fundus photos, fluorescein angiography, and retinal spectral domain optical coherence tomography are presented. Sequential optical coherence tomography images demonstrated the course of the chorioretinal lesions before and after sustained-release intravitreal dexamethasone implant. RESULTS A 19-year-old female presented with localized temporal episcleritis and scleritis that incompletely resolved despite multiple courses of topical and oral corticosteroids. She subsequently developed focal vitritis and chorioretinitis, and was found to have tarantula hair-induced panuveitis. Anterior segment optical coherence tomography and in vivo confocal microscopy confirmed the presence of tarantula hairs embedded in the anterior corneal stroma. There was only transient improvement with posterior sub-Tenon's Kenalog injection. After treatment with sustained-release intravitreal dexamethasone implant, her symptoms improved and the chorioretinal lesions became inactive. Sequential spectral domain optical coherence tomography images revealed hyperreflective inner retina lesions that progressed to involve the outer retina, and then flattened to near resolution after therapy. CONCLUSION This is the first case showing positive clinical outcomes supported by sequential retinal spectral domain optical coherence tomography using a sustained-release intravitreal dexamethasone implant to treat ophthalmia nodosa-induced by tarantula hairs.
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Affiliation(s)
- Melina I Morkin
- Department of Ophthalmology, New England Eye Center, Tufts Medical Center, Tufts University, Boston, Massachusetts
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Basso A, Negrisolo E, Zilli A, Battisti A, Cerretti P. A total evidence phylogeny for the processionary moths of the genus Thaumetopoea (Lepidoptera: Notodontidae: Thaumetopoeinae). Cladistics 2017; 33:557-573. [PMID: 34724760 DOI: 10.1111/cla.12181] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2016] [Indexed: 11/30/2022] Open
Abstract
Processionary moths belong to a group of about 100 species well known for their social behaviour and their urticating systems. The genus Thaumetopoea s.l. includes about 15 species and has been divided into three genera (Helianthocampa, Thaumetopoea s.s., and Traumatocampa) in the last revision, based on key morphological features of the adults and on the host plants of the larvae. We performed a total evidence approach to resolve the phylogeny of the genus Thaumetopoea s.l., analysing all valid taxa included in this group, plus a broad array of close relatives. Thaumetopoea was monophyletic and supported by several apomorphies. Further subclades corroborated by synapomorphies were identified. Our phylogeny suggests that Thaumetopoea must be regarded as a single genus. The mapping of key life history traits on the total evidence tree allowed us to sketch a plausible identikit of the Thaumetopoea ancestor and to track the evolution of the genus. The ancestor originated in the eastern Mediterranean area, and used broadleaved host plants. Subsequently, a switch to conifers occurred, just once, in a large subclade. The ancestor pupated in the soil, like several current species, but in a few taxa this trait was lost, together with the related morphological adaptations.
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Affiliation(s)
- Andrea Basso
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padua, Agripolis, 35020, Legnaro, Padua, Italy
| | - Enrico Negrisolo
- Department of Comparative Biomedicine and Food Science (BCA), University of Padua, Agripolis, 35020, Legnaro, Padua, Italy
| | - Alberto Zilli
- Division Insects, Department Life Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Andrea Battisti
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padua, Agripolis, 35020, Legnaro, Padua, Italy
| | - Pierfilippo Cerretti
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, Piazzale A. Moro 5, 00185, Rome, Italy
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Leblois R, Gautier M, Rohfritsch A, Foucaud J, Burban C, Galan M, Loiseau A, Sauné L, Branco M, Gharbi K, Vitalis R, Kerdelhué C. Deciphering the demographic history of allochronic differentiation in the pine processionary moth Thaumetopoea pityocampa. Mol Ecol 2017; 27:264-278. [DOI: 10.1111/mec.14411] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 10/17/2017] [Accepted: 10/25/2017] [Indexed: 01/01/2023]
Affiliation(s)
- R. Leblois
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
- Institut de Biologie Computationnelle (IBC); Université de Montpellier; Montpellier France
| | - M. Gautier
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
- Institut de Biologie Computationnelle (IBC); Université de Montpellier; Montpellier France
| | - A. Rohfritsch
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
| | - J. Foucaud
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
| | - C. Burban
- INRA, UMR1202 BIOGECO (INRA - Université de Bordeaux); Cestas Cedex France
| | - M. Galan
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
| | - A. Loiseau
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
| | - L. Sauné
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
| | - M. Branco
- Centro de Estudos Florestais (CEF); Instituto Superior de Agronomia (ISA); University of Lisbon; Lisbon Portugal
| | - K. Gharbi
- Edinburgh Genomics; School of Biological Sciences; University of Edinburgh; Edinburgh UK
| | - R. Vitalis
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
- Institut de Biologie Computationnelle (IBC); Université de Montpellier; Montpellier France
| | - C. Kerdelhué
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier; Montferrier sur Lez Cedex France
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Berardi L, Pivato M, Arrigoni G, Mitali E, Trentin AR, Olivieri M, Kerdelhué C, Dorkeld F, Nidelet S, Dubois E, Battisti A, Masi A. Proteome Analysis of Urticating Setae From Thaumetopoea pityocampa (Lepidoptera: Notodontidae). JOURNAL OF MEDICAL ENTOMOLOGY 2017; 54:1560-1566. [PMID: 28981804 DOI: 10.1093/jme/tjx144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Indexed: 06/07/2023]
Abstract
Thaumetopoea pityocampa (Denis & Schiffermüller) (Lepidoptera: Notodontidae) is harmful to conifer trees because of defoliation and to public health because of the release of urticating setae from the caterpillars. Contact with setae by humans and domestic animals induces dermatitis, usually localized to the exposed areas. Recent studies demonstrated the presence of a complex urticating mechanism where proteins present in the setae may play a role as activators of immune responses. Yet, limited information is available at present about the proteins occurring in the setae of T. pityocampa. Using a refined method for protein extraction from the setae, and a combination of liquid chromatography tandem-mass spectrometry (LC-MS/MS), de novo assembly of transcriptomic data, and sequence similarity searches, an extensive data set of 353 proteins was obtained. These were further categorized by molecular function, biological process, and cellular location. All the 353 proteins identified were found to match through BLAST search with at least one Lepidoptera sequence available in databases. We found the previously known allergens Tha p 1 and Tha p 2 described from T. pityocampa, as well as enzymes involved in chitin biosynthesis, one of the principal components of the setae, and serine proteases that were responsible for inflammatory and allergic reactions in other urticating Lepidoptera. This new proteomic database may allow for a better understanding of the complexity of allergenic reactions due to T. pityocampa and to other Lepidoptera sharing similar defense systems.
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Affiliation(s)
- L Berardi
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Universita 16, 35020 Legnaro, Padova, Italy
| | - M Pivato
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Universita 16, 35020 Legnaro, Padova, Italy
| | - G Arrigoni
- Proteomics Center, University of Padova and Azienda Ospedaliera di Padova, via G. Orus 2/B, 35129 Padova, Padova, Italy
- Department of Biomedical Sciences, University of Padova, via U. Bassi 58/B, 35131 Padova, Padova, Italy
| | - E Mitali
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Universita 16, 35020 Legnaro, Padova, Italy
| | - A R Trentin
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Universita 16, 35020 Legnaro, Padova, Italy
| | - M Olivieri
- Occupational Medicine, University Hospital of Verona, Piazzale L.A. Scuro 10, 37134 Verona, Verona, Italy
| | - C Kerdelhué
- INRA, UMR CBGP (INRA/CIRAD/IRD/Montpellier Supagro), 755 avenue du Campus Agropolis, CS30016, F-34988 Montferrier-sur-Lez Cedex, Montferrier-sur-Lez, France
| | - F Dorkeld
- INRA, UMR CBGP (INRA/CIRAD/IRD/Montpellier Supagro), 755 avenue du Campus Agropolis, CS30016, F-34988 Montferrier-sur-Lez Cedex, Montferrier-sur-Lez, France
| | - S Nidelet
- INRA, UMR CBGP (INRA/CIRAD/IRD/Montpellier Supagro), 755 avenue du Campus Agropolis, CS30016, F-34988 Montferrier-sur-Lez Cedex, Montferrier-sur-Lez, France
- MGX-Montpellier GenomiX, Institut de Génomique Fonctionnelle, 141 rue de la cardonille, 34094 Montpellier Cedex 05, Montpellier, France
| | - E Dubois
- MGX-Montpellier GenomiX, Institut de Génomique Fonctionnelle, 141 rue de la cardonille, 34094 Montpellier Cedex 05, Montpellier, France
| | - A Battisti
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Universita 16, 35020 Legnaro, Padova, Italy
| | - A Masi
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Viale dell'Universita 16, 35020 Legnaro, Padova, Italy
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Assessing Pine Processionary Moth Defoliation Using Unmanned Aerial Systems. FORESTS 2017. [DOI: 10.3390/f8100402] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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The optical imaging of tarantula hair corneal injury: One case report and review of the literature. Photodiagnosis Photodyn Ther 2017; 19:352-354. [PMID: 28736046 DOI: 10.1016/j.pdpdt.2017.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/15/2017] [Accepted: 07/16/2017] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Tarantulas belonging to the Theraphosidae family are more and more popular as family pets. Ocular injuries caused by tarantulas are reported in several articles. We hereby report the first known case of ocular injury caused by a tarantula in China and observed by anterior segment optical coherence tomography (AS-OCT). CASE A 22-year-old girl was referred to our hospital with one-week history of red and irritated left eye after she grabbed her molting Chilean Rose Tarantula. Her best-corrected visual acuity was 20/20 on both eyes. Her left eyelid was slightly red and edema. Slit-lamp examination found that more than a dozen of microscopic barbed hairs embedded into the cornea. AS-OCT showed that barbed hairs embedded in the cornea in different direction and the length of the hairs ranged from 173μm to 395μm. The anterior chamber was quiet with normal fundus and intraocular pressure. Topical steroid treatment was prescribed and the response was good. No corneal opacity or intraocular inflammation was observed after topical steroid treatment for one month. CONCLUSIONS As exotic pets become more and more popular, the importance of wearing ocular protection when handling tarantulas should be emphasized when they are sold. Tarantulas are unsuitable pet for children. When a patient presents with an unusual red eye, pet-keeping history, spiders included, should be asked.
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