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Tiffin HS, Brown JD, Ternent M, Snavely B, Carrollo E, Kibe E, Buderman FE, Mullinax JM, Machtinger ET. Resolution of Clinical Signs of Sarcoptic Mange in American Black Bears (Ursus americanus), in Ivermectin-Treated and Nontreated Individuals. J Wildl Dis 2024; 60:434-447. [PMID: 38305090 DOI: 10.7589/jwd-d-23-00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/31/2023] [Indexed: 02/03/2024]
Abstract
The parasitic mite Sarcoptes scabiei causes mange in nearly 150 species of mammals by burrowing under the skin, triggering hypersensitivity responses that can alter animals' behavior and result in extreme weight loss, secondary infections, and even death. Since the 1990s, sarcoptic mange has increased in incidence and geographic distribution in Pennsylvania black bear (Ursus americanus) populations, including expansion into other states. Recovery from mange in free-ranging wildlife has rarely been evaluated. Following the Pennsylvania Game Commission's standard operating procedures at the time of the study, treatment consisted of one subcutaneous injection of ivermectin. To evaluate black bear survival and recovery from mange, from 2018 to 2020 we fitted 61 bears, including 43 with mange, with GPS collars to track their movements and recovery. Bears were collared in triplicates according to sex and habitat, consisting of one bear without mange (healthy control), one scabietic bear treated with ivermectin when collared, and one untreated scabietic bear. Bears were reevaluated for signs of mange during annual den visits, if recaptured during the study period, and after mortality events. Disease status and recovery from mange was determined based on outward gross appearance and presence of S. scabiei mites from skin scrapes. Of the 36 scabietic bears with known recovery status, 81% fully recovered regardless of treatment, with 88% recovered with treatment and 74% recovered without treatment. All bears with no, low, or moderate mite burdens (<16 mites on skin scrapes) fully recovered from mange (n=20), and nearly half of bears with severe mite burden (≥16 mites) fully recovered (n=5, 42%). However, nonrecovered status did not indicate mortality, and mange-related mortality was infrequent. Most bears were able to recover from mange irrespective of treatment, potentially indicating a need for reevaluation of the mange wildlife management paradigm.
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Affiliation(s)
- Hannah S Tiffin
- Department of Entomology, Pennsylvania State University, 4 Chemical Ecology Laboratory, University Park, Pennsylvania 16802, USA
| | - Justin D Brown
- Department of Veterinary & Biomedical Sciences, Pennsylvania State University, 108D AVBS Building, Shortlidge Rd., University Park, Pennsylvania 16802, USA
| | - Mark Ternent
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Brandon Snavely
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Emily Carrollo
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Ethan Kibe
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Frances E Buderman
- Department of Ecosystem Science & Management, Pennsylvania State University, 401 Forest Resources Building, University Park, Pennsylvania 16802, USA
| | - Jennifer M Mullinax
- Department of Environmental Science & Technology, University of Maryland, 1433 Animal Science Building, 8127 Regents Dr., College Park, Maryland 20742, USA
| | - Erika T Machtinger
- Department of Entomology, Pennsylvania State University, 4 Chemical Ecology Laboratory, University Park, Pennsylvania 16802, USA
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Linn C, O’Malley A, Khatri K, Wright EM, Sebagh D, Grbić M, Kowal K, Chruszcz M. Microscopic Menaces: The Impact of Mites on Human Health. Int J Mol Sci 2024; 25:3675. [PMID: 38612486 PMCID: PMC11011512 DOI: 10.3390/ijms25073675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
Mites are highly prevalent arthropods that infest diverse ecological niches globally. Approximately 55,000 species of mites have been identified but many more are yet to be discovered. Of the ones we do know about, most go unnoticed by humans and animals. However, there are several species from the Acariformes superorder that exert a significant impact on global human health. House dust mites are a major source of inhaled allergens, affecting 10-20% of the world's population; storage mites also cause a significant allergy in susceptible individuals; chiggers are the sole vectors for the bacterium that causes scrub typhus; Demodex mites are part of the normal microfauna of humans and their pets, but under certain conditions populations grow out of control and affect the integrity of the integumentary system; and scabies mites cause one of the most common dermatological diseases worldwide. On the other hand, recent genome sequences of mites provide novel tools for mite control and the development of new biomaterial with applications in biomedicine. Despite the palpable disease burden, mites remain understudied in parasitological research. By better understanding mite biology and disease processes, researchers can identify new ways to diagnose, manage, and prevent common mite-induced afflictions. This knowledge can lead to improved clinical outcomes and reduced disease burden from these remarkably widespread yet understudied creatures.
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Affiliation(s)
- Christina Linn
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; (C.L.); (A.O.); (K.K.); (E.M.W.); (D.S.)
| | - Andrea O’Malley
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; (C.L.); (A.O.); (K.K.); (E.M.W.); (D.S.)
| | - Kriti Khatri
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; (C.L.); (A.O.); (K.K.); (E.M.W.); (D.S.)
| | - Elaine M. Wright
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; (C.L.); (A.O.); (K.K.); (E.M.W.); (D.S.)
| | - Dylan Sebagh
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; (C.L.); (A.O.); (K.K.); (E.M.W.); (D.S.)
| | - Miodrag Grbić
- Department of Biology, University of Western Ontario, London, ON N6A 5B7, Canada;
| | - Krzysztof Kowal
- Department of Allergology and Internal Medicine, Medical University of Bialystok, 15-276 Bialystok, Poland;
- Department of Experimental Allergology and Immunology, Medical University of Bialystok, 15-276 Bialystok, Poland
| | - Maksymilian Chruszcz
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; (C.L.); (A.O.); (K.K.); (E.M.W.); (D.S.)
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Xiong Q, Sopko B, Klimov PB, Hubert J. A novel Bartonella-like bacterium forms an interdependent mutualistic symbiosis with its host, the stored-product mite Tyrophagus putrescentiae. mSystems 2024; 9:e0082923. [PMID: 38380907 PMCID: PMC10949449 DOI: 10.1128/msystems.00829-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/31/2024] [Indexed: 02/22/2024] Open
Abstract
A novel Bartonella-like symbiont (BLS) of Tyrophagus putrescentiae was characterized. BLS formed a separate cluster from the Bartonella clade together with an ant symbiont. BLS was present in mite bodies (103 16S DNA copies/mite) and feces but was absent in eggs. This indicated the presence of the BLS in mite guts. The BLS showed a reduction in genome size (1.6 Mb) and indicates gene loss compared to Bartonella apis. The BLS can be interacted with its host by using host metabolic pathways (e.g., the histidine and arginine metabolic pathways) as well as by providing its own metabolic pathways (pantothenate and lipoic acid) to the host, suggesting the existence of a mutualistic association. Our experimental data further confirmed these potential mutualistic nutritional associations, as cultures of T. putrescentiae with low BLS abundance showed the strongest response after the addition of vitamins. Despite developing an arguably tight dependency on its host, the BLS has probably retained flagellar mobility, as evidenced by the 32 proteins enriched in KEGG pathways associated with flagellar assembly or chemotaxis (e.g., fliC, flgE, and flgK, as highly expressed genes). Some of these proteins probably also facilitate adhesion to host gut cells. The microcin C transporter was identified in the BLS, suggesting that microcin C may be used in competition with other gut bacteria. The 16S DNA sequence comparison indicated a mite clade of BLSs with a broad host range, including house dust and stored-product mites. Our phylogenomic analyses identified a unique lineage of arachnid specific BLSs in mites and scorpions.IMPORTANCEA Bartonella-like symbiont was found in an astigmatid mite of allergenic importance. We assembled the genome of the bacterium from metagenomes of different stored-product mite (T. putrescentiae) cultures. The bacterium provides pantothenate and lipoic acid to the mite host. The vitamin supply explains the changes in the relative abundance of BLSs in T. putrescentiae as the microbiome response to nutritional or pesticide stress, as observed previously. The phylogenomic analyses of available 16S DNA sequences originating from mite, scorpion, and insect samples identified a unique lineage of arachnid specific forming large Bartonella clade. BLSs associated with mites and a scorpion. The Bartonella clade included the previously described Ca. Tokpelaia symbionts of ants.
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Affiliation(s)
- Qing Xiong
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China
| | | | - Pavel B. Klimov
- Purdue University, Lilly Hall of Life Sciences, West Lafayette, Indiana, USA
| | - Jan Hubert
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
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Rahimi V, Madadi H. Additive intercropping system or acaricides: which one is more efficient to prevent population buildup of two-spotted spider mite? Environ Entomol 2024:nvae019. [PMID: 38491991 DOI: 10.1093/ee/nvae019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 02/12/2024] [Accepted: 03/01/2024] [Indexed: 03/18/2024]
Abstract
Habitat manipulation such as intercropping can be used as a simple and common cultural practice in pest management. This method is based on the principle of reducing pest populations by increasing the diversity of an ecosystem. This study has been carried out to evaluate the influence of additive series intercropping common bean with some aromatic plants (AP), and 2 acaricides on the different life stages (egg, immature mobile stages, and adult) of Tetranychus urticae Koch (Trombidiformes: Tetranychidae), over 2 yr of experimentation (2020 and 2021). This experiment was conducted following a randomized complete block design with 7 treatments including common bean monoculture, common bean sprayed by spiromesifen or Dayabon, and common bean + companion plants (coriander, ajwain, basil, or dill). Each treatment was replicated 3 replicates. The lowest and highest number of eggs, immature mobile stages, and adults were observed in common bean + spiromesifen and the common bean monoculture, respectively. Additionally, the common bean + Dayabon supported significantly different T. urticae life stage densities compared to common bean monoculture. Also, among intercropped treatments, common bean + basil showed the lowest number of T. urticae (eggs, immature mobile stages, and adults). The highest yield and land equivalent ratio were recorded in common bean + basil and common bean + spiromesifen, respectively. Finally, it can be concluded that additive intercropping with these AP can effectively decrease the T. urticae population density, which is useful for the safe production of common bean.
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Affiliation(s)
- Vahab Rahimi
- Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
| | - Hossein Madadi
- Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
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Rame JM, Ammari H, Doc A, Pressouyre L, Rigaud H, Bochaton M, Shahali Y. [Angele experiment: innovative care paths for allergy sufferers]. Soins Pediatr Pueric 2024; 45:35-42. [PMID: 38553111 DOI: 10.1016/j.spp.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
The Angele project (for Allergies complexes: prise en charge globale, diététique et environnementale) is an article 51 experiment in shared care pathways in allergology. These care paths, dedicated to patients with allergies to house dust mites and/or food, involve collaboration between doctors and paramedics. The aim of this initiative is to optimize patient care by structuring their care pathways. This article presents these pathways and the preliminary results of the experiment.
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Affiliation(s)
- Jean-Marc Rame
- Réseau d'allergologie de Franche-Comté, Bâtiment Magenta-CHU, 46 chemin du Sanatorium, 25030 Besançon, France
| | - Habiba Ammari
- Réseau d'allergologie de Franche-Comté, Bâtiment Magenta-CHU, 46 chemin du Sanatorium, 25030 Besançon, France
| | - Angélique Doc
- Réseau d'allergologie de Franche-Comté, Bâtiment Magenta-CHU, 46 chemin du Sanatorium, 25030 Besançon, France
| | - Laure Pressouyre
- Pôle prévention promotion de la santé, Mutualité française Bourgogne-Franche-Comté, 11 rue Jean-Giono, 21000 Dijon, France
| | - Hélène Rigaud
- Réseau d'allergologie de Franche-Comté, Bâtiment Magenta-CHU, 46 chemin du Sanatorium, 25030 Besançon, France
| | - Martine Bochaton
- Pôle prévention promotion de la santé, Mutualité française Bourgogne-Franche-Comté, 11 rue Jean-Giono, 21000 Dijon, France
| | - Youcef Shahali
- Réseau d'allergologie de Franche-Comté, Bâtiment Magenta-CHU, 46 chemin du Sanatorium, 25030 Besançon, France.
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Halliday B, Taggers A, Herrod A. A record of the parasitic mite Hemimyialges macdonaldi (Evans et al. 1963) (Acari: Epidermoptidae) in the Orange-bellied Parrot Neophema chrysogaster (Latham, 1790) (Psittaciformes: Psittaculidae) in Australia. Aust Vet J 2024; 102:96-100. [PMID: 38126166 DOI: 10.1111/avj.13308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/25/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023]
Abstract
The subcutaneous parasitic mite Hemimyialges macdonaldi was found in a specimen of the Orange-bellied Parrot Neophema chrysogaster that died in captivity. A review of the host range and geographic distribution of this mite shows it is cosmopolitan and occurs in a very wide range of birds. It does not appear to be a cause of significant mortality in its hosts.
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Affiliation(s)
- B Halliday
- Australian National Insect Collection, CSIRO, Canberra, Australian Capital Territory, 2601, Australia
| | - A Taggers
- The Unusual Pet Vets, Frankston, Victoria, 3199, Australia
| | - A Herrod
- Moonlit Sanctuary Wildlife Conservation Park, Pearcedale, Victoria, 3912, Australia
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Brown MS, Chong JH. Bermudagrass mite (Acari: Eriophyidae) infestation worsens in response to increasing nitrogen fertility and decreasing irrigation volume but not mowing height. J Econ Entomol 2023; 116:2124-2134. [PMID: 37950912 PMCID: PMC10711540 DOI: 10.1093/jee/toad205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/05/2023] [Accepted: 10/30/2023] [Indexed: 11/13/2023]
Abstract
Severe bermudagrass mite (Aceria cynodoniensis Sayed) infestation stunts turfgrass growth and reduces the aesthetic and recreational value of managed bermudagrass. Management practices, such as fertilization, mowing, and irrigation, may impact bermudagrass mite infestation and damage, but empirical evidence is lacking. Two 20 wk experiments were conducted with potted bermudagrass in a greenhouse or nursery to evaluate the effect of varying nitrogen rates (0, 24.5, or 49 kg N/ha), mowing heights (1.3, 2.5, 3.8, or 5 cm), and irrigation rates (60%, 100%, or 140% evapotranspiration [ET] rate) on the densities of witch's brooms (i.e., stunted and deformed terminals symptomatic of infestation) and bermudagrass mites. Increasing nitrogen fertility from 0 to 49 kg N/ha increased witch's broom and bermudagrass mite densities by 292% and 339%, respectively. Bermudagrass fertilized with nitrogen maintained higher turf quality than unfertilized grass despite greater mite damage. Decreasing irrigation from 140% to 60% of the ET rate also increased witch's broom densities by 124%. Mowing height did not consistently affect witch's broom or mite densities. Witch's broom and mite densities were positively correlated and followed a general trend with greater densities in April-August and a decline in densities in August-October. These findings suggest that nitrogen fertilization and water stress influence bermudagrass mite damage. Thus, limiting nitrogen fertilization to a level necessary to maintain turfgrass health and quality (0.5 kg N/ha) and minimizing turfgrass water stress can complement current chemical control strategies as part of an integrated pest management program.
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Affiliation(s)
- Matthew S Brown
- Department of Entomology, Rutgers University, Thompson Hall, 96 Lipman Drive, New Brunswick, NJ 08901, USA
| | - Juang Horng Chong
- Department of Plant and Environmental Sciences, Clemson University, Pee Dee Research and Education Center, 2200 Pocket Road, Florence, SC 29506, USA
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Paichitrojjana A, Paichitrojjana A. Case Series of Demodicosis in Acne Vulgaris Patients. Clin Cosmet Investig Dermatol 2023; 16:3363-3368. [PMID: 38021431 PMCID: PMC10664713 DOI: 10.2147/ccid.s441581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/14/2023] [Indexed: 12/01/2023]
Abstract
An abnormal density of Demodex mites can trigger many skin disorders known as demodicosis. Clinical manifestations of demodicosis may resemble other skin diseases and can coexist with other skin disorders, resulting in underdiagnosis and a more challenging diagnosis. Here, we report three cases of demodicosis in acne vulgaris patients. These case series have discussed their clinical features along with optimal strategies for diagnosis and treatment.
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Affiliation(s)
- Anon Paichitrojjana
- School of Anti-Aging and Regenerative Medicine, Mae Fah Luang University, Bangkok, Thailand
| | - Anand Paichitrojjana
- Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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9
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Yürekli A, Muslu İ, Pektaş SD, Alataş ET, Aydoğdu CT, Daşgin D. Using ultraviolet dermoscopy in diagnosing scabies. Exp Dermatol 2023; 32:1996-1999. [PMID: 37702268 DOI: 10.1111/exd.14930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 08/29/2023] [Accepted: 09/02/2023] [Indexed: 09/14/2023]
Abstract
The latest generation ultraviolet (UV) dermatoscopes, which emit UV light at a wavelength of 365 nm and enlarge lesions, are practical devices that can facilitate the diagnosis and follow-up of some dermatological diseases with fluorescence that can be observed in skin lesions. In 305 patients, 468 tunnels were evaluated: first in polarized mode and later in UV mode. The recorded samples were compared one-to-one by the same dermatologist. Due to the study's design, images were examined in three stages: tunnel borders, tunnel content and mite appearance. In UV mode, the entire body of mites gives a bright reflex along with an oval-shaped diagnostic clue well beyond the delta sign. The borders of the tunnel reflect brightly in UV mode, with borders that are more sharply visible than in polarized mode. Although the tunnel content cannot be clearly distinguished in polarized mode, especially in people with hyperkeratotic palms, or 'working hands' (e.g. farmers, mechanics and construction workers), with the bright reflex, the tunnel borders in UV mode give a bright reflection and provide a clear view of tunnels. Tunnel content gives a bright reflection in UV mode. Our results show that UV dermatoscopes provide more effective and clearer images than polarized dermatoscopes in the diagnosis of scabies.
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Affiliation(s)
- Aslan Yürekli
- Dermatology Department, Training and Research Hospital, Muğla Sıtkı Koçman University, Muğla, Turkey
| | - İlayda Muslu
- Dermatology Department, Medical Faculty, Muğla Sıtkı Koçman University, Muğla, Turkey
| | - Suzan Demir Pektaş
- Dermatology Department, Medical Faculty, Muğla Sıtkı Koçman University, Muğla, Turkey
| | - Emine Tuğba Alataş
- Dermatology Department, Medical Faculty, Muğla Sıtkı Koçman University, Muğla, Turkey
| | - Ceyda Tetik Aydoğdu
- Dermatology Department, Training and Research Hospital, Muğla Sıtkı Koçman University, Muğla, Turkey
| | - Dilek Daşgin
- Dermatology Department, Training and Research Hospital, Muğla Sıtkı Koçman University, Muğla, Turkey
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Yürekli A. Response to the article by González HP et al entitled "Ex vivo dermoscopy in demodicosis". J Am Acad Dermatol 2023; 89:e245-e246. [PMID: 37487831 DOI: 10.1016/j.jaad.2023.06.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/04/2023] [Accepted: 06/05/2023] [Indexed: 07/26/2023]
Affiliation(s)
- Aslan Yürekli
- Muğla Sıtkı Koçman University Training and Research Hospital Dermatology Department Muğla, Turkey.
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Yürekli A, Can İ, Oğuz M. Using ultraviolet light in diagnosing scabies: Scabies' Sign via Wood's Lamp. J Am Acad Dermatol 2023; 89:e195-e196. [PMID: 37451622 DOI: 10.1016/j.jaad.2023.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/03/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Affiliation(s)
- Aslan Yürekli
- Dermatology Department, Muğla Sıtkı Koçman University Training and Research Hospital, Dermatology Department, Muğla, Turkey.
| | - İlkay Can
- Dermatology Department, Balıkesir Atatürk City Hospital, Balıkesir, Turkey
| | - Metin Oğuz
- Dermatology Department, Turkey Hospital, İstanbul, Turkey
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Yürekli A. How does Sarcoptes scabiei var. hominis meet its oxygen needs? J Am Acad Dermatol 2023; 89:e161-e162. [PMID: 37271456 DOI: 10.1016/j.jaad.2023.05.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/08/2023] [Accepted: 05/15/2023] [Indexed: 06/06/2023]
Affiliation(s)
- Aslan Yürekli
- Dermatology Department, Training and Research Hospital, Muğla Sıtkı Koçman University, Muğla, Turkey.
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Xu Z, Cheng J, Wang T, Huang Q, Liu P, Zhang M, Zhang P, He L. Novel Jasmonic Acid-Coumarin Pathway in the Eggplant That Inhibits Vitellogenin Gene Expression To Prevent Mite Reproduction. J Agric Food Chem 2023; 71:13979-13987. [PMID: 37698370 DOI: 10.1021/acs.jafc.3c04007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Plants activate direct and indirect defense mechanisms in response to perceived herbivore invasion, which results in negative consequences for herbivores. Tetranychus cinnabarinus is a polyphagous generalist herbivore that inflicts substantial agricultural and horticultural damage. Our study revealed that mite feeding significantly increased jasmonic acid (JA) in the eggplant. The damage inflicted by the mites decreased considerably following the artificial application of JA, thereby indicating that JA initiated the defense response of the eggplant against mites. The transcriptomic and metabolomic analyses demonstrated the activation of the JA-coumarin pathway in response to mite feeding. This pathway protects the eggplant by suppressing the reproductive capacity and population size of the mites. The JA and coumarin treatments suppressed the vitellogenin gene (TcVg6) expression level. Additionally, RNA interference with TcVg6 significantly reduced the egg production and hatching rate of mites. In conclusion, the JA-coumarin pathway in the eggplant decreases the egg-hatching rate of mites through suppression of TcVg6.
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Affiliation(s)
- Zhifeng Xu
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Jinhui Cheng
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Tongyang Wang
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Qianqian Huang
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Peilin Liu
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Mengyu Zhang
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Ping Zhang
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
| | - Lin He
- College of Plant Protection, Southwest University, Chongqing 400715, People's Republic of China
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, People's Republic of China
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14
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Piou V, Vilarem C, Blanchard S, Strub JM, Bertile F, Bocquet M, Arafah K, Bulet P, Vétillard A. Honey Bee Larval Hemolymph as a Source of Key Nutrients and Proteins Offers a Promising Medium for Varroa destructor Artificial Rearing. Int J Mol Sci 2023; 24:12443. [PMID: 37569818 PMCID: PMC10419257 DOI: 10.3390/ijms241512443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 07/28/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
Varroa destructor, a major ectoparasite of the Western honey bee Apis mellifera, is a widespread pest that damages colonies in the Northern Hemisphere. Throughout their lifecycle, V. destructor females feed on almost every developmental stage of their host, from the last larval instar to the adult. The parasite is thought to feed on hemolymph and fat body, although its exact diet and nutritional requirements are poorly known. Using artificial Parafilm™ dummies, we explored the nutrition of V. destructor females and assessed their survival when fed on hemolymph from bee larvae, pupae, or adults. We compared the results with mites fed on synthetic solutions or filtered larval hemolymph. The results showed that the parasites could survive for several days or weeks on different diets. Bee larval hemolymph yielded the highest survival rates, and filtered larval plasma was sufficient to maintain the mites for 14 days or more. This cell-free solution therefore theoretically contains all the necessary nutrients for mite survival. Because some bee proteins are known to be hijacked without being digested by the parasite, we decided to run a proteomic analysis of larval honey bee plasma to highlight the most common proteins in our samples. A list of 54 proteins was compiled, including several energy metabolism proteins such as Vitellogenin, Hexamerin, or Transferrins. These molecules represent key nutrient candidates that could be crucial for V. destructor survival.
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Affiliation(s)
- Vincent Piou
- Laboratoire Evolution et Diversité Biologique, UMR5174, CNRS-Université de Toulouse III-IRD—Université Paul Sabatier, 31077 Toulouse, France; (V.P.); (S.B.)
| | - Caroline Vilarem
- Laboratoire Evolution et Diversité Biologique, UMR5174, CNRS-Université de Toulouse III-IRD—Université Paul Sabatier, 31077 Toulouse, France; (V.P.); (S.B.)
- M2i Biocontrol–Entreprise SAS, 46140 Parnac, France
| | - Solène Blanchard
- Laboratoire Evolution et Diversité Biologique, UMR5174, CNRS-Université de Toulouse III-IRD—Université Paul Sabatier, 31077 Toulouse, France; (V.P.); (S.B.)
| | - Jean-Marc Strub
- Laboratoire de Spectrométrie de Masse Bio-Organique, Département des Sciences Analytiques, Institut Pluridisciplinaire Hubert Curien, UMR 7178 (CNRS-UdS), 67037 Strasbourg, France (F.B.)
| | - Fabrice Bertile
- Laboratoire de Spectrométrie de Masse Bio-Organique, Département des Sciences Analytiques, Institut Pluridisciplinaire Hubert Curien, UMR 7178 (CNRS-UdS), 67037 Strasbourg, France (F.B.)
| | | | - Karim Arafah
- Plateforme BioPark d’Archamps, 74160 Archamps, France
| | - Philippe Bulet
- Plateforme BioPark d’Archamps, 74160 Archamps, France
- Institute pour l’Avancée des Biosciences, CR Université Grenoble Alpes, Inserm U1209, CNRS UMR 5309, 38000 Grenoble, France
| | - Angélique Vétillard
- Laboratoire Evolution et Diversité Biologique, UMR5174, CNRS-Université de Toulouse III-IRD—Université Paul Sabatier, 31077 Toulouse, France; (V.P.); (S.B.)
- Conservatoire National des Arts et Métiers (CNAM), Unité Métabiot, 22440 Ploufragan, France
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15
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Fukatsu T, Gottlieb Y, Duron O, Graf J. Editorial: Microbial associates of blood-sucking arthropods and other animals: relevance to their physiology, ecology and evolution. Front Microbiol 2023; 14:1256275. [PMID: 37564283 PMCID: PMC10411339 DOI: 10.3389/fmicb.2023.1256275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 08/12/2023] Open
Affiliation(s)
- Takema Fukatsu
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Yuval Gottlieb
- The Robert H. Smith Faculty of Agriculture, Food and Environment, Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Olivier Duron
- MIVEGEC, CNRS, IRD, University of Montpellier, Montpellier, France
| | - Joerg Graf
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT, United States
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, United States
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16
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Chen J, Zheng L, Ye Z, Wang J, Zhang F, Fu Y, Zhang C. Evaluation of the Predatory Mite Neoseiulus barkeri against Spider Mites Damaging Rubber Trees. Insects 2023; 14:648. [PMID: 37504654 PMCID: PMC10380992 DOI: 10.3390/insects14070648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/29/2023]
Abstract
The spider mites Eotetranychus sexmaculatus, Eutetranychus orientalis and Oligonychus biharensisin are severe pests of rubber trees in China. The predatory mite Neoseiulus barkeri has been found to be a natural enemy of these three pests, while nothing is known about the biological performance of this phytoseiid predator against these phytophagous mites. In this study, the development, survivorship, reproduction, adult longevity, fecundity, sex ratio and population growth parameters of N. barkeri fed on these pests were evaluated in comparison to the factitious prey Tyrophagus putrescentiae in the laboratory at 25 ± 1 °C, 75 ± 5% relative humidity and a 12:12 (L:D) h photoperiod. The results showed that N. barkeri could develop from egg to adult and reproduced successfully on the three preys. The survival rate of N. barkeri from egg to adult was higher when fed on E. orientalis (100%) and T. putrescentiae (100%) than when fed on O. biharensisin (93.60%) and E. sexmaculatus (71.42%). The shortest and longest generation time for N. barkeri were observed on E. orientalis with 6.67 d and E. sexmaculatus with 12.50 d, respectively. The maximum fecundity (29.35 eggs per female) and highest intrinsic rate of increase (rm = 0.226) were recorded when N. barkeri fed on E. orientalis, while feeding on E. sexmaculatus gave the minimum fecundity (1.87 eggs per female) and lowest reproduction rate (rm = 0.041). The values of these parameters for N. barkeri evaluated on O. biharensisin were found to be comparable to those obtained on T. putrescentiae. The sex ratio of N. barkeri progeny on the preys mentioned above, apart from O. biharensisin, was female biased. According to the findings, N. barkeri could serve as a promising biocontrol agent against E. orientalis and O. biharensisin, and possibly E. sexmaculatus on rubber trees.
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Affiliation(s)
- Junyu Chen
- College of Ecology and Environment, Hainan University, Haikou 570100, China
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 570100, China
- Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pest, Haikou 570100, China
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 570100, China
| | - Lijiu Zheng
- College of Ecology and Environment, Hainan University, Haikou 570100, China
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 570100, China
- Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pest, Haikou 570100, China
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 570100, China
| | - Zhengpei Ye
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 570100, China
- Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pest, Haikou 570100, China
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 570100, China
| | - Jianyun Wang
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 570100, China
- Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pest, Haikou 570100, China
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 570100, China
| | - Fangping Zhang
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 570100, China
- Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pest, Haikou 570100, China
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 570100, China
| | - Yueguan Fu
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 570100, China
- Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pest, Haikou 570100, China
- Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 570100, China
| | - Chenghui Zhang
- College of Ecology and Environment, Hainan University, Haikou 570100, China
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17
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Manu M, Băncilă RI, Onete M. Effect of Grazing Management on Predator Soil Mite Communities (Acari: Mesotigmata) in Some Subalpine Grasslands from the Făgăraş Mountains-Romania. Insects 2023; 14:626. [PMID: 37504632 PMCID: PMC10380866 DOI: 10.3390/insects14070626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/06/2023] [Accepted: 07/10/2023] [Indexed: 07/29/2023]
Abstract
For the first time in Romania, a complex study was conducted on soil mite communities from two types of managed grasslands: ungrazed and intensively grazed. The study was accomplished in August 2018, in the Făgăraş Mountains. Within the soil mite communities (Mesostigmata), 30 species were identified, from 80 soil samples. The following population parameters were investigated: species richness, numerical abundance, dominance, Shannon index of diversity, evenness and equitability. Eight environmental variables were also measured: soil and air humidity; soil and air temperature; soil pH; resistance of soil to penetration; soil electrical conductivity; and vegetation coverage. The results revealed that species richness, Shannon index of diversity, evenness and equitability indices had higher values in ungrazed grasslands, whereas in intensively grazed areas, the numerical abundance and dominance index had significantly higher values. The species Alliphis halleri was dominant in the ungrazed grasslands. Each type of managed grassland was characterised by specific environmental conditions, which had an important influence, even at the species level.
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Affiliation(s)
- Minodora Manu
- Department of Taxonomy, Ecology and Nature Conservation, Institute of Biology Bucharest, Romanian Academy, Street Splaiul Independenţei, 060031 Bucharest, Romania
| | - Raluca Ioana Băncilă
- Faculty of Natural and Agricultural Sciences, University Ovidius Constanţa, 900470 Constanţa, Romania
- Department of Biospeleology and Soil Edaphobiology, "Emil Racoviţă" Institute of Speleology, Romanian Academy, 050711 Bucharest, Romania
| | - Marilena Onete
- Department of Taxonomy, Ecology and Nature Conservation, Institute of Biology Bucharest, Romanian Academy, Street Splaiul Independenţei, 060031 Bucharest, Romania
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18
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Nunn FG, Ewing DA, Bartley K, Palarea-Albaladejo J, Chen W, Price DRG, Nisbet AJ. Measuring behaviour in hens using an ethogram to assess analgesia during further refinement of a high welfare, on-hen, poultry red mite feeding device. F1000Res 2023; 12:715. [PMID: 38596003 PMCID: PMC11002522 DOI: 10.12688/f1000research.133390.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/19/2023] [Indexed: 04/11/2024] Open
Abstract
Background: To refine an on-hen mite feeding device, an ethogram was employed to measure the reactions of hens during a routine experimental procedure (feather plucking) and to assess effects of analgesic cream on those reactions. Methods: Three experimental groups were used; one treated with EMLA 5% before plucking ("EMLA group"); one with aqueous cream ("placebo group") and a "no treatment" group. Behaviours were measured and compared on three days: 'dummy handling day' i.e. no plucking; 'plucking day', plucking the left thigh; and 'treatment day' i.e with right thighs plucked post-treatment. Poultry red mite feeding assays were performed to examine effect of creams on mite feeding rates, mortality and fecundity. All data were analysed using generalised linear (mixed) modelling approaches. Results: Use of the ethogram demonstrated no significant difference in hen behaviours in the EMLA group between dummy handling day and treatment day (p = 0.949) alongside a significant reduction in measured behaviours between plucking day and treatment day in the same group (p = 0.028). There was a statistically significant increase in measured behaviours from the dummy handling day to the plucking day in both placebo (p = 0.011) and no treatment group (p < 0.001). Effect sizes and directions were similar between dummy handling and treatment days in the 'placebo' and 'no treatment' groups, though not statistically significant (placebo, p = 0.064; no treatment p = 0.069). Mite feeding in the EMLA group was significantly lower than in the no treatment group in feeding assay 1 (p = 0.029) only. Mite mortality and fertility were unaffected. Conclusions: The ethogram successfully measured changes in observed behaviours between the dummy handling session and procedures. No adverse effects of EMLA cream on hens were demonstrated at 3mg/kg in hens. Use of analgesia for this routine procedure improves hens' experiences during experimental trials.
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Affiliation(s)
- F. G. Nunn
- Vaccines, Moredun Research Institute, Penicuik, Scotland, EH26 0PZ, UK
| | - D. A. Ewing
- Biomathematics and Statistics Scotland, Edinburgh, EH9 3FD, UK
| | - K. Bartley
- Vaccines, Moredun Research Institute, Penicuik, Scotland, EH26 0PZ, UK
| | | | - W. Chen
- Vaccines, Moredun Research Institute, Penicuik, Scotland, EH26 0PZ, UK
| | - D. R. G. Price
- Vaccines, Moredun Research Institute, Penicuik, Scotland, EH26 0PZ, UK
| | - A. J. Nisbet
- Vaccines, Moredun Research Institute, Penicuik, Scotland, EH26 0PZ, UK
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19
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Hubert J, Nesvorna M, Sopko B, Green SJ. Diet modulation of the microbiome of the pest storage mite Tyrophagus putrescentiae. FEMS Microbiol Ecol 2023; 99:7008491. [PMID: 36708161 DOI: 10.1093/femsec/fiad011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/29/2022] [Accepted: 01/26/2023] [Indexed: 01/29/2023] Open
Abstract
Storage mites colonize a wide spectrum of food commodities and adaptations to diets have been suggested as mechanisms enabling successful colonization. We characterized the response of seven unique Tyrophagus putrescentiae cultures (5K, 5L, 5N, 5P, 5Pi, 5S, and 5Tk) with different baseline microbiomes to different diets. The offered diets included a rearing diet, protein-enriched diet, oat flakes, and sunflower seeds. Microbiome characterization was performed using 16S ribosomal RNA (rRNA) gene amplicon sequencing and 16S rRNA gene quantitative PCR. The mite culture microbiomes were classified into four groups: (i) Sodalis-dominated (5Pi), (ii) Wolbachia-dominated (5N and 5P), (iii) Cardinium-dominated (5L and 5S), and (iv) asymbiontic (5K and 5Tk) mites dominated by Bacillus and Bartonella. Mite growth rates were most strongly affected by nutrients in the diet, while respiration and microbial community profiles were largely influenced by mite culture. While growth rate was not directly explained by microbiome composition, microbiomes strongly influenced mite fitness as measured by respiration. While diet significantly influenced microbial profiles in all cultures, the effect of diet differed in impact between cultures (5Pi > 5S > 5N > 5K > 5Tk > 5L > 5P). Furthermore, no new bacterial taxa were acquired by mites after dietary changes. Bacteria from the taxa Bacillus, Bartonella-like, Solitalea-like, Kocuria, and Sodalis-like contributed most strongly to differentiating mite-associated microbiomes.
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Affiliation(s)
- Jan Hubert
- Crop Research Institute, Drnovska 507/73, CZ-16106 Prague 6-Ruzyne, Czech Republic
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, CZ-16500 Prague 6-Suchdol, Czech Republic
| | - Marta Nesvorna
- Crop Research Institute, Drnovska 507/73, CZ-16106 Prague 6-Ruzyne, Czech Republic
| | - Bruno Sopko
- Crop Research Institute, Drnovska 507/73, CZ-16106 Prague 6-Ruzyne, Czech Republic
| | - Stefan J Green
- Genomics and Microbiome Core Facility, Rush University, Jelke Building, Room 444 1750 W. Harrison St. Chicago, IL 60612, United States
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20
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Coulibaly JT, Bogoch II. This ' mite' be a contaminant. J Travel Med 2023; 30:6604663. [PMID: 35678646 DOI: 10.1093/jtm/taac076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/02/2022] [Accepted: 06/02/2022] [Indexed: 11/14/2022]
Affiliation(s)
- Jean T Coulibaly
- Unité de Formation et de Recherche Biosciences, Université Félix Houphouët-Boigny, Abidjan, Côte d'Ivoire
| | - Isaac I Bogoch
- Divisions of General Internal Medicine and Infectious Diseases, Toronto General Hospital, University Health Network, Toronto, Ontario M5G 2C4, Canada
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21
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Yuta A, Ogawa Y, Kozaki H, Shimizu T. [CLINICAL EFFICASY OF HOUSE DUST MITE SUBLINGUAL IMMUNOTHERAPY WITH MITICURE ® TABLETS IN 115 PAITENTS FOR 3 YEARS]. Arerugi 2023; 72:273-280. [PMID: 37225468 DOI: 10.15036/arerugi.72.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We reported the results of three years of house dust mite sublingual immunotherapy with Miticure® tablets. METHODS Subjects of 115 cases (63 males, median 12.9 years old, 74 children under 15 years old) were evaluated with Japanese Rhino-conjunctivitis Quality of Life Questionnaire No1 (JRQLQ No1) and visual analog scale (VAS) of 100mm length for rhino-ocular and general symptoms. Annual survey was conducted for three years. RESULTS Symptoms in all items of 1 to 3 years later by JRQLQ No1 and VAS were significantly improved (p<0.01). There was no difference from 1 year to 3 years later. The VAS value for total symptoms decreased from 41 (18-70) mm before treatment to 10 (4-40) mm after 1 year and 10 (3-30) mm after 3 years (median (IQR)). Concomitant medications used in all patients at the start of treatment were not needed in 60.8% after 1 year and 65.2% after 3 years. After 3 years, 16.5% of the patients were completely cured with no concomitant medication and had a symptom score of 0, and 53.0% were in remission with a score of 1 or less. There was no difference in all items between children and adults, and symptoms improved equally. CONCLUSION The efficacy of house dust mite sublingual immunotherapy from 1 to 3 years was demonstrated.
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Affiliation(s)
- Atsushi Yuta
- Yuta Clinic
- Department Otorhinolaryngology, Shiga University of Medical Science
| | | | - Hideaki Kozaki
- Department Otorhinolaryngology, Shiga University of Medical Science
| | - Takeshi Shimizu
- Department Otorhinolaryngology, Shiga University of Medical Science
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22
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Nie YL, Yi H, Xie XY, Fu GL, Zheng YQ. Dermoscopic features of children scabies. Front Med (Lausanne) 2023; 10:1097999. [PMID: 36895725 PMCID: PMC9988913 DOI: 10.3389/fmed.2023.1097999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/07/2023] [Indexed: 02/25/2023] Open
Abstract
Scabies is a common skin disorder, caused by the ectoparasite Sarcoptes scabiei. The scabies mites burrow is highly diagnostic but illegible by the naked eye, because it is tiny and may completely be obscured by scratch and crust. The classic technique is opening the end of an intact mite burrow with a sharp instrument and inspecting its contents in the light microscope under loupe vision. Dermatoscope is a new method to diagnose scabies, with the advantages of non-invasive and more sensitive. This study verified the characteristic manifestations of scabies under dermoscopy. Under the closer examination of the curvilinear scaly burrow, the scabies mite itself may be seen as a dark equilateral triangular structure, which is often referred to as a "jet with contrail." Besides, this study found that the positive detection rate of microscopic characteristic manifestations under the dermoscopy ordered by the external genitals, the finger seams and the trunk, which were statistically different (P-value < 0.05). Of note, this is the first study to explore the regional distribution of the characteristic dermoscopic manifestations of scabies. We are the first to propose to focus on examining the external genitalia and finger seams with dermoscopy.
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Affiliation(s)
- Ying-Li Nie
- Department of Dermatology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong Yi
- Department of Dermatology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Yan Xie
- Department of Dermatology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gui-Li Fu
- Department of Dermatology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuan-Quan Zheng
- Department of Dermatology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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23
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Kifleyohannes T, Olstad I, Jiménez-Meléndez A, Lambert EBJ, Ingvaldsen I, Robertson LJ. Nothrus mite as a potential cause of exacerbation of pruritus in a cat. JFMS Open Rep 2023; 9:20551169231165640. [PMID: 37187464 PMCID: PMC10176559 DOI: 10.1177/20551169231165640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
Objectives Morphological and molecular approaches were used to identify arthropods associated with feline pruritus. The literature associated with the arthropod genus identified was reviewed. Methods On two occasions (summer 2020 and summer 2021), the owner of a cat with seasonal pruritus (commenced 2020) found the cat's bed was substantially infested with arthropods suspected of being associated with exacerbated pruritus. The pruritus was largely itching and hair loss, particularly on the abdomen, and flaking skin patches. On the second occasion (2021), examples of the arthropods were sent to the parasitology laboratory at the Norwegian University of Life Sciences for identification. They were examined by stereomicroscopy and tentatively identified based on morphology. DNA was extracted, and identification confirmed by PCR and sequencing. The literature was reviewed to determine whether this arthropod genus has previously been considered to be associated with pruritus or the infestation of mammals. Results Based on morphological characteristics, the arthropods were tentatively identified as Nothrus species mites. This was confirmed by PCR. A literature review found no previous reports of pruritus or other clinical signs associated with Nothrus species mites, and mites were not found on the cat. However, this mite has previously been found on small mammals at densities exceeding that expected of incidental stragglers. Conclusions and relevance The large number of Nothrus species mites could have exacerbated the cat's pruritus. By publishing this study, we hope to alert veterinarians to the possibility that Nothrus species mites may cause or exacerbate pruritus in cats.
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Affiliation(s)
| | - Ingrid Olstad
- Parasitology, Faculty of Veterinary Medicine,
Norwegian University of Life Sciences, Ås, Norway
| | | | - Elliott Brice J Lambert
- Parasitology, Faculty of Veterinary Medicine,
Norwegian University of Life Sciences, Ås, Norway
| | | | - Lucy J Robertson
- Parasitology, Faculty of Veterinary Medicine,
Norwegian University of Life Sciences, Ås, Norway
- Lucy J Robertson PhD, Parasitology, Faculty of
Veterinary Medicine, Norwegian University of Life Sciences, Elizabeth Stephansens vei 15,
Ås, N-1433, Norway
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24
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Brian JI, Aldridge DC. Mussel parasite richness and risk of extinction. Conserv Biol 2022; 36:e13979. [PMID: 35929586 PMCID: PMC10087751 DOI: 10.1111/cobi.13979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/22/2022] [Accepted: 06/15/2022] [Indexed: 04/13/2023]
Abstract
Parasite conservation is important for the maintenance of ecosystem diversity and function. Conserving parasites relies first on understanding parasite biodiversity and second on estimating the extinction risk to that biodiversity. Although steps have been taken independently in both these areas, previous studies have overwhelmingly focused on helminths in vertebrate hosts over broad scales, providing low resolution and excluding a large proportion of possible host and parasite diversity. We estimated both total obligate parasite richness and parasite extinction risk in freshwater mussels (Unionidae and Margaritiferidae) from Europe and the United States to provide a case study for considering parasite conservation in a severely understudied system. We used currently reported host-parasite relationships to extrapolate parasite diversity to all possible mussel hosts and then used the threat levels of those hosts to estimate the extinction risk for both described and undescribed parasites. An estimated 67% of parasite richness in freshwater mussels is undescribed and over 80% of the most host-specific groups (digenean trematodes and ciliates) are undescribed. We estimated that 21% of this total parasite fauna is at immediate risk of extinction, corresponding to 60 unique species, many of which will likely go extinct before being described. Given the important roles parasites play in community structure and function and the strong ecosystem engineering capacities of freshwater mussels, such extinctions are likely to severely affect freshwater ecosystems. Our detailed study of mussel parasites provides compelling evidence for the hidden conservation threat to parasites through extinction cascades and shows parasites are deserving of immediate attention.
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Affiliation(s)
- Joshua I Brian
- Department of Zoology, University of Cambridge, Cambridge, UK
- Department of Geography, King's College London, London, UK
| | - David C Aldridge
- Department of Zoology, University of Cambridge, Cambridge, UK
- BioRISC, St Catharine's College, Cambridge, UK
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Unzue A, Caballero CJ, Villanueva M, Fernández AB, Caballero P. Multifunctional Properties of a Bacillus thuringiensis Strain (BST-122): Beyond the Parasporal Crystal. Toxins (Basel) 2022; 14:toxins14110768. [PMID: 36356018 PMCID: PMC9695252 DOI: 10.3390/toxins14110768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
Chemical products still represent the most common form of controlling crop pests and diseases. However, their extensive use has led to the selection of resistances. This makes the finding of new solutions paramount to countering the economic losses that pests and diseases represent in modern agriculture. Bacillus thuringiensis (Bt) is one of the most reliable alternatives to chemical-based solutions. In this study, we aimed to further expand the global applicability of Bt strains beyond their spores and crystals. To this end, we selected a new Bt strain (BST-122) with relevant toxicity factors and tested its activity against species belonging to different phyla. The spore and crystal mixture showed toxicity to coleopterans. Additionally, a novel Cry5-like protein proved active against the two-spotted spider mite. In vivo and plant assays revealed significant control of the parasitic nematode, Meloidogyne incognita. Surprisingly, our data indicated that the nematocidal determinants may be secreted. When evaluated against phytopathogenic fungi, the strain seemed to decelerate their growth. Overall, our research has highlighted the potential of Bt strains, expanding their use beyond the confinements of spores and crystals. However, further studies are required to pinpoint the factors responsible for the wide host range properties of the BST-122 strain.
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Affiliation(s)
- Argine Unzue
- Institute of Multidisciplinary Research in Applied Biology-IMAB, Universidad Pública de Navarra, 31192 Mutilva, Spain
- Departamento de Investigación y Desarrollo, Bioinsectis SL, Plaza Cein 5, Nave A14, 31110 Noáin, Spain
| | - Carlos J. Caballero
- Departamento de Investigación y Desarrollo, Bioinsectis SL, Plaza Cein 5, Nave A14, 31110 Noáin, Spain
| | - Maite Villanueva
- Departamento de Investigación y Desarrollo, Bioinsectis SL, Plaza Cein 5, Nave A14, 31110 Noáin, Spain
| | - Ana Beatriz Fernández
- Departamento de Investigación y Desarrollo, Bioinsectis SL, Plaza Cein 5, Nave A14, 31110 Noáin, Spain
| | - Primitivo Caballero
- Institute of Multidisciplinary Research in Applied Biology-IMAB, Universidad Pública de Navarra, 31192 Mutilva, Spain
- Correspondence:
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Chambless KN, Cornell KA, Crespo R, Snyder WE, Owen JP. Diversity and Prevalence of Ectoparasites on Poultry from Open Environment Farms in the Western-United States of Washington, Idaho, Oregon, and California. J Med Entomol 2022; 59:1837-1841. [PMID: 35869567 DOI: 10.1093/jme/tjac093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Indexed: 06/15/2023]
Abstract
Open-environment poultry farms that allow chickens to forage outdoors are becoming increasingly common throughout the United States and Europe; however, there is little information regarding the diversity and prevalence of ectoparasites in these farming systems. Eight to 25 birds were captured and surveyed for ectoparasites on each of 17 farms across the states of Washington, Idaho, Oregon, and California. Among the farms sampled, six louse species (Phthiraptera: Ischnocera & Amblycera) and two parasitic mite species (Acari: Mesostigmata) were collected and identified: Goniodes gigas (Taschenberg, 1879; Phthiraptera: Menoponidae) on one farm, Menacathus cornutus (Schömmer, 1913; Phthiraptera: Menoponidae) on one farm, Menopon gallinae (Linnaeus, 1758; Phthiraptera: Menoponidae) on six farms, Lipeurus caponis (Linnaeus, 1758; Phthiraptera: Philopteridae) on five farms, Menacanthus stramineus (Nitzsch, 1818; Phthiraptera: Menoponidae) on nine farms, Goniocotes gallinae De Geer (Phthiraptera: Philopteridae) on 11 farms, Dermanyssus gallinae (De Geer, 1778; Mesostigmata: Dermanyssidae) on two farms, and Ornithonyssus sylviarum (Canestrini & Fanzago, 1877; Mesostigmata: Macronyssidae) on one farm. The diversity of ectoparasites on these open environment poultry farms highlights a need for additional research on ectoparasite prevalence and intensity in these poultry farming systems.
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Affiliation(s)
- Kendra N Chambless
- Department of Entomology, Washington State University, Pullman, WA 99164, USA
- Department of Entomology, University of Georgia, Athens, GA 30602, USA
| | - Kevin A Cornell
- Department of Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164, USA
| | - Rocio Crespo
- Avian Health and Food Safety Laboratory, Washington State University, Puyallup, WA 98371, USA
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA
| | - William E Snyder
- Department of Entomology, Washington State University, Pullman, WA 99164, USA
- Department of Entomology, University of Georgia, Athens, GA 30602, USA
| | - Jeb P Owen
- Department of Entomology, Washington State University, Pullman, WA 99164, USA
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Ubi BE, Gorafi YSA, Yaakov B, Monden Y, Kashkush K, Tsujimoto H. Exploiting the miniature inverted-repeat transposable elements insertion polymorphisms as an efficient DNA marker system for genome analysis and evolutionary studies in wheat and related species. Front Plant Sci 2022; 13:995586. [PMID: 36119578 PMCID: PMC9479669 DOI: 10.3389/fpls.2022.995586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Transposable elements (TEs) constitute ~80% of the complex bread wheat genome and contribute significantly to wheat evolution and environmental adaptation. We studied 52 TE insertion polymorphism markers to ascertain their efficiency as a robust DNA marker system for genetic studies in wheat and related species. Significant variation was found in miniature inverted-repeat transposable element (MITE) insertions in relation to ploidy with the highest number of "full site" insertions occurring in the hexaploids (32.6 ± 3.8), while the tetraploid and diploid progenitors had 22.3 ± 0.6 and 15.0 ± 3.5 "full sites," respectively, which suggested a recent rapid activation of these transposons after the formation of wheat. Constructed phylogenetic trees were consistent with the evolutionary history of these species which clustered mainly according to ploidy and genome types (SS, AA, DD, AABB, and AABBDD). The synthetic hexaploids sub-clustered near the tetraploid species from which they were re-synthesized. Preliminary genotyping in 104 recombinant inbred lines (RILs) showed predominantly 1:1 segregation for simplex markers, with four of these markers already integrated into our current DArT-and SNP-based linkage map. The MITE insertions also showed stability with no single excision observed. The MITE insertion site polymorphisms uncovered in this study are very promising as high-potential evolutionary markers for genomic studies in wheat.
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Affiliation(s)
- Benjamin Ewa Ubi
- Molecular Breeding Laboratory, Arid Land Research Center, Tottori University, Tottori, Japan
- Department of Biotechnology, Ebonyi State University, Abakaliki, Abakaliki, Ebonyi, Nigeria
| | - Yasir Serag Alnor Gorafi
- International Platform for Dryland Research and Education, Tottori University, Tottori, Japan
- Agricultural Research Corporation, Wad Medani, Sudan
| | - Beery Yaakov
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yuki Monden
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Khalil Kashkush
- Department of Life Sciences, Ben-Gurion University, Beer-Sheva, Israel
| | - Hisashi Tsujimoto
- Molecular Breeding Laboratory, Arid Land Research Center, Tottori University, Tottori, Japan
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Roczeń-Karczmarz M, Demkowska-Kutrzepa M, Zdybel J, Szczepaniak K, Studzińska M, Tomczuk K. Comparison of the effectiveness of selected essential oils with mineral oil and spinosad on Dermanyssus gallinae. Pol J Vet Sci 2022; 25:261-268. [PMID: 35861975 DOI: 10.24425/pjvs.2022.141810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
It seems that essential oils can be a good ingredient in effective preparations against Dermanyssus gallinae. Dermanyssus affects animal health leading to financial losses and bird welfare issues. Collected mites were treated with various essential oils in four (20, 50, 80 and 100%) concentrations at a dose of 0.28 mg/cm2. The direct toxicity of the essential oils, mineral oil and spinosad to D. gallinae was tested in the laboratory. Eucalyptus oil was the most toxic essential oil in all concentrations to D. gallinae (87.6 - 97.6% mortality at all four concentrations), while geranium, pine and rosemary oils showed mortality rates of 14.2 - 68.2%. High mortality after 48 hours of contact was also recorded for the oil of cloves at 80% dilution (85.1% mortality), lavender 100% (94.2% mortality). Similarly, the thyme essential oil produced 83.5 - 93.2% mortality in three concentrations: 50, 80 and 100%. The mineral oil was the least effective oil against mites. Spinosad showed high effectiveness against D. gallinae.
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Affiliation(s)
- M Roczeń-Karczmarz
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland
| | - M Demkowska-Kutrzepa
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland
| | - J Zdybel
- Department of Parasitology and Invasive Diseases, National Veterinary Research Institute in Puławy, Al. Partyzantów 57, 24-100, Puławy, Poland
| | - K Szczepaniak
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland
| | - M Studzińska
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland
| | - K Tomczuk
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland
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Razzak MA, Seal DR, Schaffer B, Liburd OE, Colee J. Within-plant Distributions and Density of Amblyseius swirskii (Acari: Phytoseiidae) as Influenced by Interactions Between Plastic Mulch and Vegetable Crop Species. Environ Entomol 2022; 51:22-31. [PMID: 35171279 DOI: 10.1093/ee/nvab112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Indexed: 06/14/2023]
Abstract
Plastic mulch of different colors and ultraviolet (UV) reflectivity individually or combined with released arthropod predators is an important component of an integrated pest management strategy. In 2015 and 2016, we evaluated the density and within-plant distribution of a released predatory mite, Amblyseius swirskii Athius-Henriot (Acari: Phytoseiidae) in snap bean (Phaseolus vulgaris L.), cucumber (Cucumis sativus L.), yellow squash (Cucurbita pepo L.), eggplant (Solanum melongena L.), Jalapeno pepper (Capsicum annuum L.), and tomato (Solanum lycopersicum L.) grown on different plastic mulches. The mulch treatments evaluated were: metalized top and black bottom, metalized top and white bottom, black-on-black, black-on-white, white-on-black, and bare soil with no mulch. Crop species had a significant effect on the density of A. swirskii. Eggplant and cucumber had higher numbers of A. swirskii than the other crops tested in 2015. In 2016, the density of A. swirskii was higher on eggplant than on cucumber. There was a variation in the distribution of A. swirskii in different strata of the plant canopies with the highest number in the bottom stratum of each crop, which was positively correlated with the population of Thrips palmi Karny (Thysanoptera: Thripidae). Mulch type had no effect on the density or distribution of A. swirskii in any strata of any of the crops tested. The results of this study indicate that releasing A. swirskii is compatible with the use of UV-reflective mulch. This information about host preference and within-plant distribution of A. swirskii should be of value in pest management programs for the crops studied.
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Affiliation(s)
- Mohammad A Razzak
- Tropical Research and Education Center, University of Florida, 18905 SW 280th Street, Homestead, FL 33031-3314, USA
- Department of Zoology, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh
| | - Dakshina R Seal
- Tropical Research and Education Center, University of Florida, 18905 SW 280th Street, Homestead, FL 33031-3314, USA
| | - Bruce Schaffer
- Tropical Research and Education Center, University of Florida, 18905 SW 280th Street, Homestead, FL 33031-3314, USA
| | - Oscar E Liburd
- Entomology and Nematology Department, University of Florida, Steinmetz Hall, 1881 Natural Area Drive, Gainesville, FL 32611, USA
| | - James Colee
- Statistical Consulting Unit, University of Florida, 201 Criser Hall, Gainesville, Florida, 32611, USA
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Bilodeau L, Beaman L. Differential Expression of Three Dopamine Receptors in Varroa-Resistant Honey Bees. J Insect Sci 2022; 22:9. [PMID: 35066590 PMCID: PMC8784087 DOI: 10.1093/jisesa/ieab109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Indexed: 06/14/2023]
Abstract
Various stocks of honey bees (Apis mellifera L. (Hymenoptera: Apidae)) employ multiple mechanisms to control varroa mite (Varroa destructor Anderson & Trueman (Mesostigmata: Varroidae)) infestations. Identification of trait-associated genes and markers can improve efficiency of selective breeding. Dopamine receptors show promise in this regard in their association with numerous traits in honey bees, high plasticity, and indicated association with varroa resistance through QTL analysis. We assessed the relationship between exposure to mite-infested brood and gene expression of the honey bee dopamine receptors, Amdop1, Amdop2, and Amdop3, in bees and stocks with known levels of varroa resistance, in Spring 2016 (VSH vs Italian) and Summer 2019 (Pol-line vs Italian). Relative mRNA expression levels varied both by honey bee stock and before/after exposure to varroa-infested brood, in 7-, 10-, and 14-day-old bees. However, the trials revealed contrasting patterns in expression of the three dopamine receptors. In 2016, downregulation was evident in VSH bees, but varied by days post-emergence and by gene. The 2019 trial showed upregulation post-exposure in both stocks, and at all ages, for Amdop1, Amdop2, and Amdop3, with the exception of 14 d Italian bees for Amdop2 and Amdop3. Stock comparison in 2019 showed upregulation of all three dopamine-like receptors in post-exposure bees of all ages. Season and associated differences in mite loads may have contributed to the differences observed across trials. Differential expression of all three dopamine receptors suggests a role for the dopaminergic system in varroa resistance and suggests that further characterization of these receptors for breeding potential is warranted.
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Affiliation(s)
- Lelania Bilodeau
- USDA-ARS Honey Bee Breeding, Genetics and Physiology Laboratory, Baton Rouge, LA 70820, USA
| | - Lorraine Beaman
- USDA-ARS Honey Bee Breeding, Genetics and Physiology Laboratory, Baton Rouge, LA 70820, USA
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Kavallieratos NG, Boukouvala MC, Nika EP, Eleftheriadou N, Avtzis DN. Immediate and Delayed Mortality of Four Stored-Product Pests on Concrete Surfaces Treated with Chlorantraniliprole. Insects 2021; 12:insects12121088. [PMID: 34940176 PMCID: PMC8704883 DOI: 10.3390/insects12121088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/29/2021] [Accepted: 12/01/2021] [Indexed: 12/02/2022]
Abstract
Simple Summary We examined the mortality caused by the anthranilic diamide, chlorantraniliprole, at four different doses applied on concrete (0.01, 0.05, 0.1, and 0.5 mg a.i./cm2) in Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) adults and larvae, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) adults, Sitophilus oryzae (L.) (Coleoptera: Curculionidae) adults, and Acarus siro L. (Sarcoptiformes: Acaridae) adults and nymphs. Mortality data were recorded after 1, 2, 3, 4, and 5 days to determine the immediate mortality. Furthermore, after the 5-day mortality counts, still living individuals were conveyed for 7 days to untreated concrete surfaces to estimate the delayed mortality. The highest immediate mortality was recorded for the larvae of T. castaneum, reaching 96.7%, followed by the adults of A. siro (92.2%) after 5 days of exposure to 0.5 mg a.i./cm2. Complete (100.0%) delayed mortality was noticed for T. castaneum (adults and larvae), S. oryzae, and A. siro (both as adults) at 0.5 mg a.i./cm2. Rhyzopertha dominica adults and A. siro nymphs exhibited 98.6% and 96.3% delayed mortality at the same dose, respectively. Overall, our results demonstrate that chlorantraniliprole is effective against all the species tested, causing varying immediate and delayed mortality rates at the developmental stages tested. Abstract Chlorantraniliprole is an effective pesticide against a plethora of pests, but its efficacy against stored-product pests is very poorly explored. In this study we treated concrete surfaces with four different doses of chlorantraniliprole (0.01, 0.05, 0.1, and 0.5 mg a.i./cm2) against the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) adults and larvae, the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) adults, the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae) adults, and the flour mite, Acarus siro L. (Sarcoptiformes: Acaridae) adults and nymphs, to examine the immediate mortalities after 1, 2, 3, 4, and 5 days of exposure. Additionally, the delayed mortality of the individuals that survived the 5-day exposure was also evaluated after a further 7 days on untreated concrete surfaces. We documented high mortality rates for all tested species and their developmental stages. After 5 days of exposure to 0.5 mg a.i./cm2, T. castaneum larvae and A. siro adults exhibited the highest immediate mortality levels, reaching 96.7% and 92.2%, respectively. Delayed mortality was also very high for all tested species and their developmental stages. Nymphs of A. siro displayed a 96.3% delayed mortality followed by the adults of R. dominica (98.6%) after exposure to 0.5 mg a.i./cm2. All other tested species and their developmental stages reached complete (100.0%) delayed mortality, where even 0.01 mg a.i./cm2 caused ≥86.6% delayed mortality in all species and their developmental stages. Taking into consideration the effectiveness of chlorantraniliprole on this wide range of noxious arthropods, coupled with its low toxicity towards beneficial arthropods and mammals, this pesticide could provide an effective management tool for stored-product pests in storage facilities.
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Affiliation(s)
- Nickolas G. Kavallieratos
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., 11855 Athens, Attica, Greece;
- Correspondence: (N.G.K.); (M.C.B.); Tel.: +30-2105294569 (N.G.K.)
| | - Maria C. Boukouvala
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., 11855 Athens, Attica, Greece;
- Correspondence: (N.G.K.); (M.C.B.); Tel.: +30-2105294569 (N.G.K.)
| | - Erifili P. Nika
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., 11855 Athens, Attica, Greece;
| | - Nikoleta Eleftheriadou
- Forest Research Institute, Hellenic Agricultural Organization Demeter, 57006 Vassilika, Thessalonıki, Greece; (N.E.); (D.N.A.)
| | - Dimitrios N. Avtzis
- Forest Research Institute, Hellenic Agricultural Organization Demeter, 57006 Vassilika, Thessalonıki, Greece; (N.E.); (D.N.A.)
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Bai WF, Lin ZG, Yan WY, Zhang LZ, Evans JD, Huang Q. Haplotype Analysis of Varroa destructor and Deformed Wing Virus Using Long Reads. Front Insect Sci 2021; 1:756886. [PMID: 38468896 PMCID: PMC10926369 DOI: 10.3389/finsc.2021.756886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/03/2021] [Indexed: 03/13/2024]
Abstract
As a phoretic parasite and virus vector, the mite Varroa destructor and the associated Deformed wing virus (DWV) form a lethal combination to the honey bee, Apis mellifera. Routine acaricide treatment has been reported to reduce the diversity of mites and select for tolerance against these treatments. Further, different DWV strains face selective pressures when transmitted via mites. In this study, the haplotypes of Varroa mites and associated DWV variants were quantified using long reads. A single haplotype dominated the mite mitochondrial gene cytochrome oxidase subunit I, reflecting an ancient bottleneck. However, highly polymorphic genes were present across the mite genome, suggesting the diversity of mites could be actively maintained at a regional level. DWV detected in both mites and honey bees show a dominant variant with only a few low-frequency alternate haplotypes. The relative abundances of DWV haplotypes isolated from honey bees and mites were highly consistent, suggesting that some variants are favored by ongoing selection.
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Affiliation(s)
- Wen Feng Bai
- Honeybee Research Institute, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Province Key Laboratory of Honeybee Biology and Beekeeping, Jiangxi Agricultural University, Nanchang, China
| | - Zhe Guang Lin
- Apicultural Research Institute, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Wei Yu Yan
- Honeybee Research Institute, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Province Key Laboratory of Honeybee Biology and Beekeeping, Jiangxi Agricultural University, Nanchang, China
| | - Li Zhen Zhang
- Honeybee Research Institute, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Province Key Laboratory of Honeybee Biology and Beekeeping, Jiangxi Agricultural University, Nanchang, China
| | - Jay D. Evans
- United States Department of Agriculture - Agricultural Research Service (USDA-ARS) Bee Research Laboratory, Beltsville, MD, United States
| | - Qiang Huang
- Honeybee Research Institute, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Province Key Laboratory of Honeybee Biology and Beekeeping, Jiangxi Agricultural University, Nanchang, China
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Hubert J, Nesvorna M, Pekar S, Green SJ, Klimov PB. Cardinium inhibits Wolbachia in its mite host, Tyrophagus putrescentiae, and affects host fitness. FEMS Microbiol Ecol 2021; 97:6358523. [PMID: 34448854 DOI: 10.1093/femsec/fiab123] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/24/2021] [Indexed: 12/14/2022] Open
Abstract
Interactions among endosymbiotic bacteria inside their eukaryotic hosts are poorly understood, particularly in mites. The mite Tyrophagus putrescentiae is a common, medically important generalist species that has many intracellular and gut bacterial symbionts. In the experiments, we examined bacterial abundances and composition in mite populations obtained by controlled mixing of stock mite populations that differed in the presence/absence of the major intracellular bacteria Wolbachia and Cardinium. Changes in microbial communities were characterized using 16S ribosomal RNA high-throughput sequencing (pooled mite individuals) and quantitative PCR for key microbial taxa (individual mites). Mite fitness was estimated as a parameter of population growth. We detected that in mixed mite populations, Cardinium and Wolbachia can co-occur in the same mite individual. The presence of Cardinium was negatively correlated with the presence of Wolbachia and Bartonella, while the Bartonella and Wolbachia were positively correlated in individual level samples. Since mixed populations had lower abundances of Wolbachia, while the abundance of Cardinium did not change, we suggest that the presence of Cardinium inhibits the growth of Wolbachia. The mixed mite populations had lower population growth than parental populations. The possible effect of symbionts on the fitness of mixed population is discussed.
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Affiliation(s)
- Jan Hubert
- Crop Research Institute, Drnovska 507/73, CZ-16106 Prague 6-Ruzyne, Czechia.,Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, CZ-165 00 Prague 6-Suchdol, Czechia
| | - Marta Nesvorna
- Crop Research Institute, Drnovska 507/73, CZ-16106 Prague 6-Ruzyne, Czechia
| | - Stano Pekar
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czechia
| | - Stefan J Green
- Genomics and Microbiome Core Facility, Rush University, Chicago, IL 60612, USA
| | - Pavel B Klimov
- School of Natural Sciences, Bangor University, Bangor, LL57 2 UW, UK.,Institute of Biology, University of Tyumen, Pirogova 3, 625043 Tyumen, Russia
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Benito-Murcia M, Bartolomé C, Maside X, Bernal J, Bernal JL, Del Nozal MJ, Meana A, Botías C, Martín-Hernández R, Higes M. Residual Tau-Fluvalinate in Honey Bee Colonies Is Coupled with Evidence for Selection for Varroa destructor Resistance to Pyrethroids. Insects 2021; 12:731. [PMID: 34442297 DOI: 10.3390/insects12080731] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 11/17/2022]
Abstract
Varroa destructor is considered one of the most devastating parasites of the honey bee, Apis mellifera, and a major problem for the beekeeping industry. Currently, the main method to control Varroa mites is the application of drugs that contain different acaricides as active ingredients. The pyrethroid tau-fluvalinate is one of the acaricides most widely used in beekeeping due to its efficacy and low toxicity to bees. However, the intensive and repetitive application of this compound produces a selective pressure that, when maintained over time, contributes to the emergence of resistant mites in the honey bee colonies, compromising the acaricidal treatments efficacy. Here we studied the presence of tau-fluvalinate residues in hives and the evolution of genetic resistance to this acaricide in Varroa mites from honey bee colonies that received no pyrethroid treatment in the previous four years. Our data revealed the widespread and persistent tau-fluvalinate contamination of beeswax and beebread in hives, an overall increase of the pyrethroid resistance allele frequency and a generalized excess of resistant mites relative to Hardy-Weinberg equilibrium expectations. These results suggest that tau-fluvalinate contamination in the hives may seriously compromise the efficacy of pyrethroid-based mite control methods.
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Seo MG, Song BG, Kim TK, Noh BE, Lee HS, Lee WG, Lee HI. Nationwide Incidence of Chigger Mite Populations and Molecular Detection of Orientia tsutsugamushi in the Republic of Korea, 2020. Microorganisms 2021; 9:1563. [PMID: 34442642 DOI: 10.3390/microorganisms9081563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/02/2021] [Accepted: 07/21/2021] [Indexed: 11/17/2022] Open
Abstract
The Korea Disease Control and Prevention Agency has established regional centers at 16 locations to monitor vectors and pathogens. We investigated the geographical and temporal distribution of chigger mite populations to understand tsutsugamushi disease epidemiology in 2020. To monitor weekly chigger mite populations, 3637 chigger mites were collected from sticky chigger mite traps in autumn. Chigger mites appeared from the first week of October to the third week of December, peaking in the fourth week of October. The predominant species were Leptotrombidium scutellare, Leptotrombidium palpale, Neotrombicula kwangneungensis, Neotrombicula tamiyai, and Leptotrombidium pallidum. To monitor Orientia tsutsugamushi infection in chigger mites, 50,153 chigger mites were collected from 499 trapped wild rodents in spring and autumn, with a chigger index of 100.5. Approximately 50% of chigger mites were pooled into 998 pools, and the minimum infection rate (MIR) of O. tsutsugamushi was 0.1%. Jeongeup had the highest MIR for O. tsutsugamushi (0.7%). The Kato-related genotype was the most common (52.2%), followed by the Karp-related (17.4%), Boryong (13.0%), JG-related (8.7%), Shimokoshi (4.3%), and Kawasaki (4.3%) genotypes. Ecological and geographical studies focusing on the basic ecology and pathology of mites will improve our understanding of tsutsugamushi disease risks in the Republic of Korea.
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Álvarez-Ruiz L, Belliure J, Santos X, Pausas JG. Fire reduces parasite load in a Mediterranean lizard. Proc Biol Sci 2021; 288:20211230. [PMID: 34255996 PMCID: PMC8277473 DOI: 10.1098/rspb.2021.1230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 06/22/2021] [Indexed: 01/23/2023] Open
Abstract
Wildfires are a natural disturbance in many ecosystems. However, their effect on biotic interactions has been poorly studied. Fire consumes the vegetation and the litter layer where many parasites spend part of their life cycles. We hypothesize that wildfires reduce habitat availability for parasites with consequent potential benefits for hosts. We tested this for the lizard Psammodromus algirus and its ectoparasites in a Mediterranean ecosystem. We predicted that lizards in recently burned areas would have lower parasite load (cleaning effect) than those in unburned areas and that this phenomenon implies that lizards spending their entire lives in postfire conditions experience a lower level of parasitism than those living in unburned areas. We compared the ectoparasite load of lizards between eight paired burned/unburned sites, including recent (less than 1 year postfire) and older fires (2-4 years). We found that lizards' ectoparasites prevalence was drastically reduced in recently burned areas. Likewise, lizards in older burned areas showed less evidence of past parasitic infections. Fire disrupted the host-parasite interaction, providing the opportunity for lizards to avoid the negative effects of ectoparasites. Our results suggest that wildfires probably fulfil a role in controlling vector-borne diseases and pathogens, and highlight ecological effects of wildfires that have been overlooked.
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Affiliation(s)
- Lola Álvarez-Ruiz
- Centro de Investigaciones sobre Desertificación (CIDE-CSIC), Ctra. Náquera Km 4.5, Moncada, 46113 Valencia, Spain
| | - Josabel Belliure
- Departamento de Ciencias de la Vida, Universidad de Alcalá, Alcalá de Henares, 28805 Madrid, Spain
| | - Xavier Santos
- CIBIO/InBIO (Centro de Investigação em Biodiversidade e Recursos Genéticos da Universidade do Porto), R. Padre Armando Quintas, 4485-661 Vairão, Portugal
| | - Juli G. Pausas
- Centro de Investigaciones sobre Desertificación (CIDE-CSIC), Ctra. Náquera Km 4.5, Moncada, 46113 Valencia, Spain
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Abstract
Trombiculosis is a skin infestation by larvae of mites of the Trombiculidae family. We used fluorescence-advanced videodermatoscopy to diagnose trombiculosis in a woman in Italy with targetoid patches. This method might be useful for identifying atypical manifestations of trombiculosis.
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Murphy CY, Burrows ME. Management of the Wheat Curl Mite and Wheat Streak Mosaic Virus With Insecticides on Spring and Winter Wheat. Front Plant Sci 2021; 12:682631. [PMID: 34168670 PMCID: PMC8217877 DOI: 10.3389/fpls.2021.682631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
The wheat curl mite (WCM, Aceria tosichella, Keifer) is an eriophyid mite species complex that causes damage to cereal crops in the Northern Great Plains by feeding damage and through the transmission of plant viruses, such as wheat streak mosaic virus. Insecticide treatments were evaluated in the greenhouse and field for efficacy at managing the WCM complex on wheat. Treatments tested were carbamates, organophosphates, pyrethroids, a neonicotinoid seed treatment, mite growth inhibitors, and Organic Materials Review Institute-approved biocontrols, soaps, and oils. Treatment with carbamates, organophosphates, and pyrethroids decreased WCM in greenhouse trials compared with untreated controls 14 days after infestation. The seed treatment, mite growth inhibitors, and organic pesticides did not reduce WCM populations effectively and consistently. The timing of application was tested using a sulfur solution as the experimental treatment. Treating plants with sulfur seven days after mite infestation reduced mites compared with the untreated control. In contrast, prophylactically applied sulfur and sulfur applied 14 days after mite infestation were not effective. When tested under field conditions with plots infested with viruliferous mites, there was no yield difference detected between untreated control plots and plots sprayed with insecticides. Select carbamates, organophosphates, and pyrethroids have a potential for use in greenhouse mite management when appropriate.
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Arthur AL, Maino J, Hoffmann AA, Jasper M, Lord A, Micic S, Edwards O, van Rooyen A, Umina PA. Learnings from over a decade of increasing pesticide resistance in the redlegged earth mite, Halotydeus destructor (Tucker). Pest Manag Sci 2021; 77:3013-3024. [PMID: 33638285 DOI: 10.1002/ps.6340] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 02/01/2021] [Accepted: 02/26/2021] [Indexed: 05/24/2023]
Abstract
BACKGROUND The redlegged earth mite, Halotydeus destructor (Tucker), is a destructive and economically important pest of winter grain crops and pastures in Australia. It is largely controlled by pesticides, but this mite has evolved resistance to pyrethroid and organophosphate chemicals. A national Resistance Management Strategy has been developed for pro-active management to delay further resistance evolution, though its success is reliant on a detailed understanding of the incidence, patterns of spread, current distribution and the nature of resistance in the field. Here, we report on a long-term resistance surveillance programme undertaken between 2006 and 2019 informed by resistance risk forecasting. RESULTS By mapping the Australian distribution of resistance through time, we show that resistance is present across three Australian states and covers more than 3000 km. This current range includes a recently identified population exhibiting organophosphate resistance representing the most easterly location of resistance in H. destructor. Using field history information, we identify associations for the first time between crop management practices employed by farmers and the presence of pyrethroid resistance. Management strategies that could minimize the risk of further resistance include limiting local spread of resistance through farm hygiene practices, crop rotations and reducing pesticide usage. CONCLUSION This study highlights the challenges of resistance in H. destructor but also indicates how quantitative resistance risk analysis can be developed to target field surveillance and delay further resistance. The management strategies highlighted in this study can help maintain the effectiveness of control options but will depend on farmer engagement and adoption. © 2021 Society of Chemical Industry.
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Affiliation(s)
| | | | - Ary A Hoffmann
- School of BioSciences, Bio21 Institute, The University of Melbourne, Parkville, Australia
| | - Moshe Jasper
- School of BioSciences, Bio21 Institute, The University of Melbourne, Parkville, Australia
| | - Alan Lord
- Department of Primary Industries and Regional Development, Industry and Economic Development, South Perth, Australia
| | - Svetlana Micic
- Department of Primary Industries and Regional Development, Industry and Economic Development, South Perth, Australia
| | | | | | - Paul A Umina
- Cesar Australia, Parkville, Australia
- School of BioSciences, Bio21 Institute, The University of Melbourne, Parkville, Australia
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Yuta A, Ogawa Y, Suzuki Y, Kozaki H, Shimizu T. [COMPARISON OF CLINICAL EFFICACY AND SAFETY BETWEEN CHILDREN AND ADULTS BEFORE AND 1 YEAR AFTER MITE SUBLINGUAL IMMUNOTHERAPY FOR PERENNIAL ALLERGIC RHINITIS]. Arerugi 2021; 70:186-194. [PMID: 34011773 DOI: 10.15036/arerugi.70.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND We studied clinical efficacy and safety after 1 year of mite sublingual immunotherapy (SLIT) for perennial allergic rhinitis in children, compared with adults. METHODS We compared 121 children under 15 yeas old (81 male, aged 5-14 years, a median of 12 years) and 77 adults (36 male, aged 15-65 years, a median of 26 years) treated with mite SLIT tablet (10000 Japanese Allergy Unit). The clinical efficacy before and 1 year after SLIT was evaluated by assessing symptom scores by Japanese rhino-conjunctivitis quality of life questionnaire (JRQLQ No1) and visual analog scale (VAS). Combined medication was also compared. Adverse events of SLIT were checked at every visit. RESULTS All items of JRQLQ No1 scores and VAS after 1 year of mite SLIT, except eye symptoms in adults by JRQLQ No1, were significantly improved in both children and adults. Comparing children and adults, there were no differences in symptoms before and after 1 year. Combined medication score showed a similar result. Adverse events were observed in 57.9% of children and 58.4% of adults, but there were no serious adverse reactions. CONCLUSION There was no difference between children and adults in efficacy and safety of mite SLIT, and both group showed significant improvement of symptoms.
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Affiliation(s)
- Atsushi Yuta
- Yuta Clinic.,Department Otorhinolaryngology, Shiga University of Medical Science
| | | | - Yusuke Suzuki
- Department of Otolaryngology, Head and Neck Surgery, Yamagata University Faculty of Medicine
| | - Hideaki Kozaki
- Department Otorhinolaryngology, Shiga University of Medical Science
| | - Takeshi Shimizu
- Department Otorhinolaryngology, Shiga University of Medical Science
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Greco V, Scalvenzi M, Fabbrocini G, Megna M. Is It Possible to Improve Scabies Diagnosis Performance? Dermatol Pract Concept 2021; 11:e2021015. [PMID: 33954011 DOI: 10.5826/dpc.1102a15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2020] [Indexed: 10/31/2022] Open
Affiliation(s)
- Vincenzo Greco
- Dermatology Unit, Department of Clinical Medicine and Surgery, University of Naples Federico II, Italy
| | - Massimiliano Scalvenzi
- Dermatology Unit, Department of Clinical Medicine and Surgery, University of Naples Federico II, Italy
| | - Gabriella Fabbrocini
- Dermatology Unit, Department of Clinical Medicine and Surgery, University of Naples Federico II, Italy
| | - Matteo Megna
- Dermatology Unit, Department of Clinical Medicine and Surgery, University of Naples Federico II, Italy
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Bassini-Silva R, Jacinavicius FDC, Huang-Bastos M, Dowling APG, Barros-Battesti DM. A Checklist of Macronyssid Species (Mesostigmata: Macronyssidae) From Brazil. J Med Entomol 2021; 58:625-633. [PMID: 33257994 DOI: 10.1093/jme/tjaa245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Indexed: 06/12/2023]
Abstract
Macronyssid mites are parasites of reptiles, birds, and mammals. A checklist of macronyssid species of Brazil is provided, containing 13 genera and 26 species collected from 99 host species.
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Affiliation(s)
- Ricardo Bassini-Silva
- Laboratório de Doenças Parasitárias, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, FMVZ-USP, São Paulo, SP, Brazil
- Laboratório Especial de Coleções Zoológicas, Instituto Butantan, São Paulo, SP, Brazil
| | | | - Matheus Huang-Bastos
- Laboratório de Doenças Parasitárias, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, FMVZ-USP, São Paulo, SP, Brazil
- Laboratório Especial de Coleções Zoológicas, Instituto Butantan, São Paulo, SP, Brazil
| | - Ashley P G Dowling
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR
| | - Darci Moraes Barros-Battesti
- Laboratório de Doenças Parasitárias, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, FMVZ-USP, São Paulo, SP, Brazil
- Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Jaboticabal, SP, Brazil
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Sonthalia S, Agrawal M, Bhatia J, Zeeshan M, Elsamanoudy S, Tiwary P, Bhat YJ, Jha A, Bosseila M. Entodermoscopy Update: A Contemporary Review on Dermoscopy of Cutaneous Infections and Infestations. Indian Dermatol Online J 2021; 12:220-236. [PMID: 33959518 PMCID: PMC8088165 DOI: 10.4103/idoj.idoj_559_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/16/2020] [Accepted: 12/20/2020] [Indexed: 01/11/2023] Open
Abstract
Infectious cutaneous diseases are very common, especially in certain geographic and tropical regions. Sometimes they may simulate other dermatoses, ordering verification of diagnosis with particular investigations. Dermoscopy is among one of the most important tools readily available in the outpatient setting for the dermatologist to confirm the diagnosis. In this up-to date review, literature concerning the various dermoscopic features of parasitic, viral, dermatophytic and bacterial cutaneous infections is composed. In addition artefacts as well as practical issues in dermoscopy usage are discussed; with the aim to empower dermatologists to promptly and non-invasively diagnose and manage cutaneous infections and infestations.
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Affiliation(s)
| | - Mahima Agrawal
- Department of Dermatology and STD, Lady Hardinge Medical College and ASS Hospitals, New Delhi, India
| | | | - Md Zeeshan
- Department of Skin and V.D., Patna Medical College and Hospital, Patna, Bihar, India
| | - Solwan Elsamanoudy
- Department of Dermatology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Pankaj Tiwary
- Department of Skin and V.D., Patna Medical College and Hospital, Patna, Bihar, India
| | - Yasmeen Jabeen Bhat
- Department of Dermatology, Venereology & Leprosy, Government Medical College, Srinagar, J&K, India
| | - Abhijeet Jha
- Department of Skin and V.D., Patna Medical College and Hospital, Patna, Bihar, India
| | - Manal Bosseila
- Department of Dermatology, Faculty of Medicine, Cairo University, Cairo, Egypt
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Abstract
This article provides an up-to-date review of disease-causing viruses and phytoplasmas of currants including symptoms, transmission, detection, economic impact, and control measures. Currants are widely cultivated in more than 30 countries in the temperate zones of Europe, Asia, South America, Australia, and New Zealand. Ribes spp. can be infected by more than 20 virus species and four Candidatus Phytoplasma species, with more to be described in the future. High-throughput sequencing opened a new era of deciphering virus variants and mixed infections, leading to the characterization of several new species. The use of clean propagation material is the basis for control of Ribes graft-transmissible diseases, but this has become a challenging task given the ever-growing number of newly discovered pathogens.
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Affiliation(s)
- Josef Špak
- Biology Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic
| | - Igor Koloniuk
- Biology Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic
| | - Ioannis E Tzanetakis
- Department of Entomology and Plant Pathology, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701, U.S.A
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Yazisiz H, Çekİn Y, Sezer İ, Bostan F, KoÇlar FG. Demodex Species Frequency and Risk Factors in Patients With Rheumatoid Arthritis. Arch Rheumatol 2021; 35:376-384. [PMID: 33458661 PMCID: PMC7788659 DOI: 10.46497/archrheumatol.2020.7699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 11/02/2019] [Indexed: 11/18/2022] Open
Abstract
Objectives
This study aims to investigate the presence of Demodex species in rheumatoid arthritis (RA) patients, to identify the risk factors for developing Demodex infestation, and to determine the effect of immunosuppressant drugs on Demodex mite infestations. Patients and methods
The study included 93 RA patients (16 males, 77 females; mean age 53.3±11.3 years; range, 27 to 83 years) and 76 healthy controls (19 males, 57 females; mean age 50.3±13.9 years; range, 19 to 86 years). Specimens were collected from face skin by using standardized sur- face skin biopsy. Demodex infestation was considered for ≥5 living parasites/cm2 of skin while Demodex mite presence was defined as any Demodex larvae, adults, or eggs found in the specimen. Results
The frequencies of Demodex mite presence were 44% for the RA patients and 15.7% for the healthy controls (p<0.001). The rates of Demodex infestation were similar between the two groups (18.3% versus 7.9%, p=0.054). There were no statistically significant differences between the groups regarding skin type, skin care, epilation, body washing, use of a moisturizer, personal towel use, the number of residents at home, or whether there were pets at home or in proximity. Itching in eyes was higher in RA patients, but the frequency of other skin symptoms was not differ- ent from healthy controls. Logistic regression analysis indicated that the diagnosis of RA was an independent risk factor for Demodex mite presence in this study population. Disease activity and duration, use of corticosteroids, conventional disease-modifying anti-rheumatic drugs (DMARDs) and biological DMARDs were not effective factors on Demodex mite presence in RA patients. Conclusion Although Demodex mite presence was 3.5-fold higher in RA patients, the rate of Demodex infestation was similar to that of healthy controls.
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Affiliation(s)
- Hatice Yazisiz
- Department of Medical Microbiology, Division of Parasitology, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Yeşim Çekİn
- Department of Medical Microbiology, University of Health Sciences, Antalya Training and Research Hospital, Antalya, Turkey
| | - İlhan Sezer
- Department of Physical Therapy and Rehabilitation, Division of Rheumatology University of Health Sciences, Antalya Training and Research Hospital, Antalya, Turkey
| | - Feyzi Bostan
- Department of Internal Medicine, University of Health Sciences, Antalya Training and Research Hospital, Antalya, Turkey
| | - Fatma Gülsüm KoÇlar
- Department of Medical Parasitology, University of Health Sciences, Antalya Training and Research Hospital, Antalya, Turkey
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Fagny M, Kuijjer ML, Stam M, Joets J, Turc O, Rozière J, Pateyron S, Venon A, Vitte C. Identification of Key Tissue-Specific, Biological Processes by Integrating Enhancer Information in Maize Gene Regulatory Networks. Front Genet 2021; 11:606285. [PMID: 33505431 PMCID: PMC7834273 DOI: 10.3389/fgene.2020.606285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/03/2020] [Indexed: 12/27/2022] Open
Abstract
Enhancers are key players in the spatio-temporal coordination of gene expression during numerous crucial processes, including tissue differentiation across development. Characterizing the transcription factors (TFs) and genes they connect, and the molecular functions underpinned is important to better characterize developmental processes. In plants, the recent molecular characterization of enhancers revealed their capacity to activate the expression of several target genes. Nevertheless, identifying these target genes at a genome-wide level is challenging, particularly for large-genome species, where enhancers and target genes can be hundreds of kilobases away. Therefore, the contribution of enhancers to plant regulatory networks remains poorly understood. Here, we investigate the enhancer-driven regulatory network of two maize tissues at different stages: leaves at seedling stage (V2-IST) and husks (bracts) at flowering. Using systems biology, we integrate genomic, epigenomic, and transcriptomic data to model the regulatory relationships between TFs and their potential target genes, and identify regulatory modules specific to husk and V2-IST. We show that leaves at the V2-IST stage are characterized by the response to hormones and macromolecules biogenesis and assembly, which are regulated by the BBR/BPC and AP2/ERF TF families, respectively. In contrast, husks are characterized by cell wall modification and response to abiotic stresses, which are, respectively, orchestrated by the C2C2/DOF and AP2/EREB families. Analysis of the corresponding enhancer sequences reveals that two different transposable element families (TIR transposon Mutator and MITE Pif/Harbinger) have shaped part of the regulatory network in each tissue, and that MITEs have provided potential new TF binding sites involved in husk tissue-specificity.
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Affiliation(s)
- Maud Fagny
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE – Le Moulon, Gif-sur-Yvette, France
| | - Marieke Lydia Kuijjer
- Centre for Molecular Medicine Norway (NCMM), Nordic EMBL Partnership, University of Oslo, Oslo, Norway
- Department of Pathology, Leiden University Medical Center, Leiden, Netherlands
| | - Maike Stam
- Plant Development and (Epi) Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Johann Joets
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE – Le Moulon, Gif-sur-Yvette, France
| | - Olivier Turc
- LEPSE, Univ Montpellier, INRAE, Institut Agro, Montpellier, France
| | - Julien Rozière
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE – Le Moulon, Gif-sur-Yvette, France
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay, France
- Université de Paris, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay, France
| | - Stéphanie Pateyron
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay, France
- Université de Paris, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay, France
| | - Anthony Venon
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE – Le Moulon, Gif-sur-Yvette, France
| | - Clémentine Vitte
- Université Paris-Saclay, INRAE, CNRS, AgroParisTech, GQE – Le Moulon, Gif-sur-Yvette, France
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Canto-Osorio JM, Cuxim-Koyoc A, Ruiz-Piña HA, Morales-Malacara JB, Reyes-Novelo E. Ectoparasites of Didelphis virginiana From Yucatan, Mexico. J Med Entomol 2020; 57:1821-1829. [PMID: 32504090 DOI: 10.1093/jme/tjaa106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 06/11/2023]
Abstract
A faunal study is presented to determine the species of ectoparasites found in the opossum Didelphis virginiana (Kerr) (Marsupialia: Didelphidae). For this, Tomahawk traps were placed in the peridomiciles of a rural town in Yucatán, to capture individuals of this marsupial and proceed to the collection of their ectoparasites. A total of 3,023 arthropods were collected from 145 opossums. The most frequent ectoparasites were the acarines Ornithodoros (Alectorobius) nr. talaje (64.8%) (Argasidae); Ornithonyssus wernecki Fonseca (53.8%) (Macronyssidae) and Didelphilicus serrifer Fain (25.5%) (Atopomelidae); the ticks Amblyomma parvum Aragão (8.3%) and A. mixtum Koch (10.3%) (Ixodidae); and the fleas Ctenocephalides felis (Bouché) (20.7%) and Pulex simulans Baker (8.3%) (Pulicidae). It is concluded that the ectoparasite fauna of this marsupial is mainly composed of euryxenous organisms, which have been documented as vectors of diseases caused by rickettsial bacteria. Since D. virginiana is widely adapted to the peridomiciliary environment in the region, this study allows recognizing those that represent a potential risk for the transmission of vector-borne zoonotic diseases.
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Affiliation(s)
- Juan Miguel Canto-Osorio
- Centro de Investigaciones Regionales 'Dr. Hideyo Noguchi', Universidad Autónoma de Yucatán, Mérida, Yucatán, México
| | - Alan Cuxim-Koyoc
- Centro de Investigaciones Regionales 'Dr. Hideyo Noguchi', Universidad Autónoma de Yucatán, Mérida, Yucatán, México
| | - Hugo A Ruiz-Piña
- Centro de Investigaciones Regionales 'Dr. Hideyo Noguchi', Universidad Autónoma de Yucatán, Mérida, Yucatán, México
| | - Juan B Morales-Malacara
- Laboratorio de Espeleobiología y Acarología, Facultad de Ciencias, Campus Juriquilla, Universidad Nacional Autónoma de México, Querétaro, Querétaro, México
| | - Enrique Reyes-Novelo
- Centro de Investigaciones Regionales 'Dr. Hideyo Noguchi', Universidad Autónoma de Yucatán, Mérida, Yucatán, México
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48
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Floris I, Pusceddu M, Satta A. How the Infestation Level of Varroa destructor Affects the Distribution Pattern of Multi-Infested Cells in Worker Brood of Apis mellifera. Vet Sci 2020; 7:E136. [PMID: 32957617 DOI: 10.3390/vetsci7030136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/28/2020] [Accepted: 09/16/2020] [Indexed: 11/29/2022] Open
Abstract
The mite Varroa destructor, the main ectoparasite of honey bees, is a threat to apiculture worldwide. Understanding the ecological interactions between Varroa and honeybees is fundamental for reducing mite impact in apiaries. This work assesses bee colonies with various Varroa infestation levels in apiaries to determine: (1) the relationship between multi-infested brood cells and brood infestation level, (2) the damage caused by Varroa to parasitized honey bee pupae, and (3) mite reproduction rate at various infestation levels. Data were collected from 19 worker brood combs, each from a different colony, ranging from 160 to 1725 (mean = 706) sealed cells per comb. Mite distribution was aggregated, ranging from about 2% to 74% infested cells per comb. The percentage of cells invaded by one, two, three, four, or more than four foundress mites, as a function of infestation level, was estimated by five highly significant (p < 0.0001) second-degree polynomial regression equations. The correction factors found could increase the precision of prediction models. Varroa fertility and adult bee longevity decreased as multi-infestation levels increased, and the implications of this relationship are discussed. Finally, these findings could improve sampling methods and the timing of mite treatments in apiaries, thus favoring sustainable management strategies.
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49
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Guo Y, Wang R, Zhao Y, Niu D, Gong X, Hu L. Study on the Relationship Between Microbial Composition and Living Environment in Important Medical Mites Based on Illumina MiSeq Sequencing Technology. J Med Entomol 2020; 57:1049-1056. [PMID: 32215556 DOI: 10.1093/jme/tjaa034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Indexed: 06/10/2023]
Abstract
The microbiota of mites is closely related to their growth, development, and pathogenicity. Therefore, it is necessary to study the bacteria in mites. Here, for the first time, based on 16s rRNA V3-V4 region, the microbiota of 45 samples of nine species in six families of medically important mites were analyzed using Illumina MiSeq sequencing technique. The results showed that, at the phylum level, Proteobacteria (56.20-86.40%) were the dominant, followed by Firmicutes (6.41-19.43%), Bacteroidetes (5.56-13.38%) and Actinobacteria (1.93-28.07%). But at the genera the microbiota of mites are different, showing four characteristics: 1) The microbiota is related to the parasitic host. Demodex folliculorum (Acariforms: Demodicidae) and D. brevis (Acariforms: Demodicidae), both parasitizing humans, showed similar microbial composition, as did D. canis (Acariforms: Demodicidae) and Sarcoptes scabiei canis (Acariforms: Sarcoptidae) parasitizing dogs, but D. caprae (Acariforms: Demodicidae) parasitizing sheep showed unique microbial community; 2) The microbiota is related to mite's species. Dermatophagoides farinae and Cheyletus malaccensis (Acariforms: Cheyletidae), both collecting from flour, show respective microbial composition; 3) The microbiota is related to the life stage. There were differences in microbiota between adults and larvae of D. farinae, but no differences observed in Psoroptes cuniculi (Acariforms: Psoroptidae); and 4) The microbiota is related to the blood-feeding state. The microbiota of blood-fed Ornithonyssus bacoti (Parasitiformes: Macronyssidae) adults was significantly higher than that of unfed adults. This indicates that the microbiota of mites is affected by mite species, parasitic host, growth stage and habitat. Therefore, understanding these influencing factors will have a very important guiding significance for the prevention and control of mite-borne diseases.
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Affiliation(s)
- Yijie Guo
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Ruiling Wang
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
- Assisted Reproduction Center, Northwest Women's & Children's Hospital, Xi'an, China
| | - Yae Zhao
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Dongling Niu
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Xiaojuan Gong
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Li Hu
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
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50
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Temeyer KB, Schlechte KG, Dandeneau LB. Sand Fly Colony Crash Tentatively Attributed to Nematode Infestation. J Med Entomol 2020; 57:1301-1304. [PMID: 31953543 DOI: 10.1093/jme/tjz256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 06/10/2023]
Abstract
Maintenance of laboratory colonies of insects and other arthropod pests offers significant research advantages. The availability, age, sex, housing conditions, nutrition, and relative uniformity over time of biological material for research facilitate comparison of results between experiments that would otherwise be difficult or impossible. A laboratory research colony of Phlebotomus papatasi (Scopoli), old world sand flies, was maintained with high-colony productivity for a number of years, but within a relatively short (4-6 mo) time period, colony productivity declined from over 10,000 flies per week to less than 100 per week. Mites and nematodes were both visible in the larval medium; however, the mites had been present throughout high productivity periods; therefore, it seemed reasonable to investigate the nematodes. PCR amplification of 18S rRNA yielded a clean cDNA sequence identified by BLAST search as Procephalobus sp. 1 WB-2008 (Rhabditida: Panagrolaimidae) small subunit ribosomal RNA gene, GenBank EU543179.1, with 475/477 nucleotide identities. Nematode samples were collected and identified as Tricephalobus steineri, (Andrássy, 1952) Rühm, 1956 (Rhabditida: Panagrolaimidae) based on morphological characteristics of the esophagus and the male copulatory apparatus. Mites (Tyrophagus putrescentiae [Acariformes: Acaridae]) may have played an additional predatory role in the loss of sand fly colony productivity. We hypothesized that the origin of the nematode infestation was rabbit dung from a local rabbitry used in preparation of the larval medium. Colony productivity was fully restored within 3 mo (two sand fly generational periods) by replacement of the rabbit dung from a clean source for use to prepare sand fly larval medium.
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Affiliation(s)
| | - Kristie G Schlechte
- Knipling-Bushland U.S. Livestock Insects Research Laboratory, USDA-ARS, 2700 Fredericksburg Road, Kerrville, TX
| | - Laryssa B Dandeneau
- Knipling-Bushland U.S. Livestock Insects Research Laboratory, USDA-ARS, 2700 Fredericksburg Road, Kerrville, TX
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