Disease Transmission By Insects
DOWNLOAD
Download Disease Transmission By Insects PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Disease Transmission By Insects book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Disease Transmission By Insects
DOWNLOAD
Author : James Busvine
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Disease Transmission By Insects written by James Busvine and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.
About 100 years ago, it was dicovered that insects transmit grave, mainly tropical diseases - very much to the astonishment of the physicians of that time, who saw this as a new, possibly easy, way of eradicating the diseases by exterminating the vectors. For some years, DDT and other then new insecticides achieved great improvements, but subsequently serious setbacks emerged: insecticide-resistance and anxiety about toxicity to man and animals. In the past twenty years, serious efforts have been made tofind alternatives, with varying degrees of success.
Insect Transmission Of Plant Diseases
DOWNLOAD
Author : Leach
language : en
Publisher: Daya Books
Release Date : 2007
Insect Transmission Of Plant Diseases written by Leach and has been published by Daya Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Agricultural pests categories.
Volume Brings Into Focus The Crucial Role Played By Insects In The Spread And Development Of Various Plant Diseases. Against The Background Of Advances In Plant Pathology, It Is Described How Bacterial, Fungus, Virus And Other Plant Diseases Are Transmitted Through Insects. Based On Author S Personal Research Work, A Number Of Diseases In Specifies Crops Have Been Discussed, Supplemented With Illustrations, Tables Of Technical Data And Diagrams. Also There Are Special Chapters On The Anatomy And Physiology Of Plants In Relation To Infection; Feeding And Breeding Habits To Insects; And The Techniques Particularly Useful For The Study Of Insect Transmission Of Plant Diseases. With Prolific Reference For Further And Deeper Information Appended To Each Of The Chapters, The Book Should Interest The Students And Scholars Of Entomology And Plant Pathology, Particularly. Contents: Chapter 1: Introduction; The Science Of Plant Pathology: Its Origin And Growth, The Passing Ofthe Exploratory And Descriptive Stage, Modern Emphasis On More Basic Problems, Insect Transmission A Neglected Borderline Field, Some Causes Of Neglect, Viewpoints Of Pathlogists And Entomologists, Some Results Of Neglect, Relation Of Dipterous Insects To Bacterial Soft Rot Misinterpreted, Failure To Recognize Role Of Flea Beetles In Transmitting Bacterial Wilt Of Corn, Confusion Of Tipburn And Hoppeburn Of Potatoes, Bark Beetles And Blue-Stain Fungi As Factors In Death Of Pines, Need For More And Better Cooperation, Possible Aids In Overcoming Difficulties In Cooperation, The Complexity Of The Phenomenon Of Insect Transmission, Biological And Evolutionary Aspects, Interaction Of Plant, Pathogen And Vector And Influence Of Environment, Need For Special Techniques, Lessons To Be Learned From Insect Transmission Of Animal Diseases, Chapter 2: The Interrelationships Of Plants And Insects; Close Association Of Insects And Plants In Evolutionary Past, Interdependence Of Plants And Insects, Phytophagous Insects: Methods Of Feeding, Injuries And Benefits, Entomophagous Plants, The Flycatcher, The Pitcher Plants, The Butterworts, The Sundews, The Bladderworts, The Venus S Flytrap, Nematode Entraping Fungi, Entomophthorous Plants: Bacterial Diseases Of Insects, Fungus Diseases, Virus Diseases, Protozoal Diseases, Entomophilous Plants, Agents Of Pollination, Origin Of Entomophily, Plant Adaptations, Insect Adaptations, Symbiosis Between Insects And Plants, Chpater 3: Symbiosis Between Insects And Microorganisms And Its Significance In Plant Pathology; Symbiosis, Origin Of The Term And Concept Expressed, Kind Of Symbiosis, Symbiosis Between Insects And Microorganisms, Ecotosymbiosis: Ambrosia, Beetles, And Fungi, Termites And Fungi, The Fungus Cultivating Ants, Endosymbiosis: Progressive Series Of Complexity, The Nature Of The Symbiotic Association, Septobasidium And Scale Insects, Bacteria And Dipterous Insects, The Drug Store Bettle And Yeast, Intracellular Symbiosis In The Homoptera, Mycetocytes And Mycetomes, Rikettsia, Chapter 4: The Relation Of Insects To The Spread And Development Of Plant Diseases; Historical Review: Poineer Work Of Waite On Insect Transmission Of Fire Blight, Takami And Rice Dwarf, Early Work On Sugar Beet Leaf Roll, Allard And Tobacco Mosaic, Parallel Developments In Insect Transmission Of Animal Diseases, The Olive Fly And Olive Knot, Bacterial Wilt Of Cucurbits And The Cucumber Beeltes, Norton S Review, Hopperburn Of Potatoes And Other Plants, Survey Of Field By Rand And Pierce, Symposium Of 1921, Buchner S Tier And Pflanze In Symbiose:, Boning S Review, Leach S Review, Symposium Of 1987, The Roles Played By Insects: Direct Disease Production, Dissemination Of The Pathogen, Inoculation, Ingression, Invasion, Preservation, Possible Role Of Insects In Origin Of New Diseases; Classification Of Methods Of Insects Transmission, Biologic And Evolutionary Significance Of Insect Transmission, Insect And Diploidization Of Heterothallic Fungi, Chapter 5: Plant Diseases Caused By Toxicogenic Insects; Nature Of Diseases Caused By Insects: Toxocogenic And Toxoniferous Insects, Phytotoxaemias , Or Toxicoses Compared With Virus Diseases, Stigmonose, Hopperburn, Toxicogenic Casid Bugs, Froghopper Blight Of Sugar Cane, Mealy Bug Wilt Of Pineapple, Green Spotting Of Pineapples, Psyllid Yellows Of Potatoes, Anasa Wilt Of Cucurbits, Insect Galls, Insect Causing Galls, Morphology Of Insect Galls, The Ambrosia Galls, The Gall Producing Stimulus, The Histology Of Galls, Chapter 6: Insects And Bacterial Diseases; Fire Blight Of Orchard Fruits, Soft Rot Of Plants And Dipterous Insects, Potato Blackleg, Softrot Of Crucifers And The Cabbage Maggot, The Heart Rot Of Celery, Bacterial Wilt Of Cucurbits, Bacterial Wilt Of Corn (Stewart S Disease), Olive Knot, Bacterial Rot Of Apples And The Apple Maggot, Gummosis Of Sugar Cane, A Bacterial Disease Of Willows And The Willow Borer, Bacterial Wilt Of Solanacea, Bacteriosis Of Prickly Pear Plants, Bacterial Gall Of Douglas Fir And Chermes Colleyi, Black Rot Of Crucifers, Angular Leaf Spot Of Tobacco And The Southern Tobacco Warm, Bean Bacteriosis And Thrips, Blade Blight Of Oats, Gardenia Bud Drop, The Spot Disease Of Cauliflower And Red Bordered Stink Bug, Bacteria Associated With Aphids Adn A Gall Of Witch Hazel, Chapter 7: Insects And Fungus Diseases; Ergot Of Cereals And Grasses, Bark Beetles And Blue Stain Of Conifers, The Dutch Elm Disease, Fig Diseases, Endosepsis, Souring, Smut, Perennial Canker Of Apple And The Wolly Aphis, European Canker And The Wolly Aphis, Bees And Downy Mildew Of Lima Beans, Plant Bugs And Stigmatomycosis, The Anther Smut Of Pinks, Blossom Blight Of Red Cover, Tree Cricket Canker Of Apple, Chest Nut Blight, Insects And Tomato Leaf Spot Diseases, Insects And Sooty Mold, Insects And Brown Rot Of Stone Fruits, The Potato Flea Beetle And Potato Scrab, Blackleg Of Cabbage And The Cabbage Maggot, Insects And Red Rot Of Sugar Cane, Insects And Diseases Of Mushrooms, Plum Wilt And The Peach Tree Borer, Insect Dissemination Of The Cotton Wilt Pathogen, Monochamus Spp. And The Heart Rot Of Conifers, Insects And A Sapwood Decay Of Conifers, Chapter 8: Insects And Virus Diseases; Virus Diseases: Apparent Increase In Prevalence And Probable Explanation, Number And Economic Importance, Nautre Of Viruses, Agents Of Viruse Dissemination: Wind, Water, Soil, Seed, Pollen, Other Plant Parts, Parasitic Fungi, Man, Insects, Orders Of Insects Containing Vectors Of Viruses, Orthoptera, Thysanoptera, Homoptera, Hemiptera, Coleoptera, Methods Of Virus Transmission By Insects, Mechanical, Biological, Multiplication Of The Virus In The Insect Body, The Incubation Period In The Insect Body, Specificity Of Virus Transmission By Insect Vectors, The Obligatory Nature Of Insect Transmission Of Certain Viruses, The Relation Of The Age Or Life Stage Of The Insect Vectors And Its Ability To Transmit The Virus, Congenital Transmission Of Virus In The In The Insect Vector, The Effect Of The Virus On The Insect Vector, Chapter 9: Insects And Virus Diseases (Continued); Selected Examples Of Virus Diseases Transmitted By Insects, Transmission By Mechanical Sap Inoculation, Insect Transmission Purely Mechnical: Potato Spindle Tuber, Tobacco Mosaic, Yellow Dwarf Of Onions, Cucumber Mosaic, Western Celery Mosaic, Transmission By Aphids, Showing Group Specificity, Insect Transmission Not Entirely Mechanical: Sugar Cane Mosaic, Potato Leaf Roll, Transmission By Leaf Hoppers, Biological And Highly Specific: Curly Top Of Sugar Beet And Other Plants, Aster Yellows, False Blossom Of Cranberry, Potato Yellow Dwarf, The Fiji Diseases Of Sugar Cane, Transmission By Thrips, Biological And Specific: Spotted Wilt, Yellow Spot Of Pineapple, Trnasmission By Lace Bugs, Biological And Specific: Leaf Curl Of Sugar Beet, Savoy Of Beets, Transmission By White Flies, Biological And Specific: Leaf Curl Of Cotton, Cassava Mosaic, Transmission By Mites: Reversion Of Black Currants, Nature Of Transmission Obscure: Wheat Mosaic, Latent (X) Virus Of Potato, Chapter 10: Insects And Phytopathogenic Protozoa; Protoxoa As Plant Pathogens, Protozoa In Laticiferous Plants, Insect Tranmissions Of Endophytic Protozoa, Phloem Necrosis Of Coffee, Chapter 11: Mites, Nematodes, And Other Small Animals As Vectors Of Plant Diseases; Mites: Their Nature And Economic Importance, Mitesand The Silver Top Of June Grass And Bud Rot Of Carnations, Mites As Vectors Of Blue Stain Fungi, Of The Dutch Elm Disease, Of Microorgnaisms Causing Decay Of Plants, Of Reversion In Black Currants, Nematodes: Their Nature And Economic Importance, Nematodes And The Dilophospora Diseases Of Cereals, Root Nematodes As Agents Of Transmission Of Plant Pathogens, Earthworms And Club Root Of Crucifers, Slugs As Vectors Of Plant Pathogens, Birds As Vectors Of Chestnut Canker, Of Mistletoe, Chapter 12: The Anatomy And Physiology Of Plants In Relation To Infection And Insect Vectors; Natural Protection Of Plants Against Infection, The Relation Of Tissues To Insect Transmission Of Diseases: The Epidermis, The Stomata, Plasmodesmata, Hydathodes, Nectaries And Other Floral Organs, The Periderm, Would Cork, Callus, Latex Ducts, Physiology And Chemical Composition: Klendusity, Resistance Of Plants To Insects, Chapter 13: The Anatomy And Physiology Of Insects In Relation To The Transmission Of Plant Diseases; The Exoskeleton And Its Components, The Mouth Parts: The Labroum, The Epipharynx, The Mandibles, Themaxillae, The Hypopharynx, The Labium, The Mouth Parts Of Chewing Insects, Rasping Sucking Mouth Parts, Piercing Sucking Mouth Parts, The Mechanics Of Penetration By Sucking Mouth Parts, Sponging Mouth Parts, Siphoning Mout Hparts, Chewing Lapping Mouth Parts, The Salivary Glands, The Alimentary Canal, The Stomodaeum, The Mesenteron, The Proctodaeum, The Organs Of Reporudction, The Internal Genitalia, The External Genitalia, Chapter 16: The Inocual Of Plant Pathogens In Relation To Insect Transmission; The Nature Of Inocula Of Plant Pathogens, Bacteria: Size, Spores, Exudate, Resistance Of Natural Environment, Resistance Of Digestive Fluids Of Insects, Pleomorphism, Fungi, Vegetative Mycelium: Selerotia, Spores, Spores Horne In Sticky Matrix, Adherence Of Dry Spores, Resistance Of Spores To Natural Environment, Resistance To Digestive Fluids Of Insects, Odors And Colors Attractive To Insects, Food Value Of Spore Matrix, Place Of Spore Formation, Forcible Discharge Of Spores, Protozoa, Dependence Upon Insects For Disemination, Inoculation, And Ingresion, Viruses, Nature Of Inoculum, Wide Variability In Properties, Infection Requirements And Insect Inoculation, Seed Plants, Sticky Matrix Of Mistetoe Seed, Chapter 15: The Feeding And Breeding Habits Of Insects In Relation To The Transmission Of Plant Diseases; Feeding Habits, Necessity Of Regular Visitation Of Both Diseases And Healthy Plants, The Mechanics Of Feedings, Choice Of Food Plants, Host Relationships Of Aphids Classified, Insect Mortility, Tissue Selection, Breeding Habits, Ovipositions Wounds, Place Of Oviposition, Preference Of Breeding Hosts, Breeding Habits In Relation To Cultivation Practices, Insect Abundance, Chapter 16: Insect Transmission Of Animal Diseases Compared With Insect Transmission Of Plant Diseases; The Relationships Between Plant And Animal Pathology, Brief Historical Survey Of Medical Entomology, Mosquitoes And Filariasis, Cattle Ticks And Texas Fever, The Tsetse Fly And Nagana Diseases Of Cattle, The Tsetse Fly And Sleeping Sickness, Mosquitoes And Malaria, Mosquitoes And Yellow Fever, Mosquitoes And Dengue, Fleas And Bubonic Plague, Lice And Typhus Fever, Lice And Trench Fver, Flies And Typhoid Fever, A Comparison Of Insect Transmission Of Plant And Animal Diseases, Chapter 17: Methods Useful In The Study Of Insect Trnansmission Of Plant Diseases; Problems Of Techniques Presented By Borderline Field Of Study, Koch S Postulates, Their Application To Insect Transmitted Virus Diseases, Virus Purification, Rules Of Proof For Insect Transmission, Supplementary Data, Taxonomic Problems: Importance Of Correct Identification Of Insect Vectors, The Value Of Field Observations, Greenhouse Andcages, Insect Traps: Light Traps, Wind Traps, Microbiological Methods, Selective Media, Isolation Of Plants Pathogens From Insect Vectors, Histological Methods: Fixing Solution For Plant And Insect Materials, Staining, Miscellaneous Techniques For Special Purposes.
Dynamic Models Of Infectious Diseases
DOWNLOAD
Author : Vadrevu Sree Hari Rao
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-11-07
Dynamic Models Of Infectious Diseases written by Vadrevu Sree Hari Rao and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-07 with Science categories.
Despite great advances in public health worldwide, insect vector-borne infectious diseases remain a leading cause of morbidity and mortality. Diseases that are transmitted by arthropods such as mosquitoes, sand flies, fleas, and ticks affect hundreds of millions of people and account for nearly three million deaths all over the world. In the past there was very little hope of controlling the epidemics caused by these diseases, but modern advancements in science and technology are providing a variety of ways in which these diseases can be handled. Clearly, the process of transmission of an infectious disease is a nonlinear (not necessarily linear) dynamic process which can be understood only by appropriately quantifying the vital parameters that govern these dynamics.
Flies And Disease
DOWNLOAD
Author : Bernard Greenberg
language : en
Publisher: Princeton University Press
Release Date : 2019-01-29
Flies And Disease written by Bernard Greenberg and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-29 with Medical categories.
This second volume of Flies and Disease spans the recorded history of synanthropic flies, from earliest Sumerian writings to contemporary research on their biology and involvement in the transmission of disease agents. Geographically, its coverage is worldwide. Biologically, it provides an in-depth view of the community in the fly and the fly in the community. The exhaustive evaluation of fly involvement in more than sixty human and animal diseases is drawn against a background that gives careful balance to other modes of dissemination. The opening chapter is a survey of attitudes toward flies through recorded history. The second chapter deals with the life history, breeding, distribution, dispersal, and overwintering habits of common synanthropic flies. Chapter 3 looks at the fly as a host and examines its micro-ecology from the viewpoint of the microbe intent on colonizing the fly. The final two chapters examine the evidence for the specific involvement of flies in human and animal diseases. The result is the most complete portrait ever drawn of these ancient pests and a rational basis for new programs of research. This book should prove invaluable to the public health worker, epidemiologist, medical entomologist, microbiologist, and parasitologist. Together with Volume I, it is a monumental work on the complex subject of flics and disease and will remain the definitive work for years to come. Bernard Greenberg is Professor of Biological Sciences at the University of Illinois, Chicago Circle. Originally published in 1973. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Diseases Spread By Insects Or Ticks
DOWNLOAD
Author : Mary E. Miller
language : en
Publisher: Momentum Press
Release Date : 2018-01-24
Diseases Spread By Insects Or Ticks written by Mary E. Miller and has been published by Momentum Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-24 with Science categories.
Vector borne diseases transmitted through ticks and mosquitos cause serious loss of life and significantly impact human populations worldwide. Each of these diseases is caused by a distinct pathogen, and symptoms vary depending on the type and severity of infection. The spread of these diseases occur through the blood meals of tick or mosquitos, where the pathogen gains access to the human body, usually triggering an immune response that contributes to disease progression. Understanding the interdependence of pathogen to disease vector along with transmission route to humans shapes our diagnosis and treatment of these diseases. This book focuses on five distinct examples of vector borne disease: Malaria, West Nile, Lyme disease, dengue fever, and bubonic plaque. Malaria involves the mosquito vector and occurs when mosquito transmit the Plasmodium parasite to humans. West Nile and dengue fever also involve different mosquito vectors, but in this case transmission of the West Nile virus or dengue fever virus cause disease. Fleas transmit the bubonic plague causing bacterium Y. pestis. Lyme disease results from the transmission of the bacteria Borrelia burgdorferi to humans through the bit of a tick. In each case we consider current and future issues related to disease progression, diagnosis, and treatments.
Dynamic Models Of Infectious Diseases
DOWNLOAD
Author : Vadrevu Sree Hari Rao
language : en
Publisher: Springer
Release Date : 2012-11-07
Dynamic Models Of Infectious Diseases written by Vadrevu Sree Hari Rao and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-07 with Science categories.
Despite great advances in public health worldwide, insect vector-borne infectious diseases remain a leading cause of morbidity and mortality. Diseases that are transmitted by arthropods such as mosquitoes, sand flies, fleas, and ticks affect hundreds of millions of people and account for nearly three million deaths all over the world. In the past there was very little hope of controlling the epidemics caused by these diseases, but modern advancements in science and technology are providing a variety of ways in which these diseases can be handled. Clearly, the process of transmission of an infectious disease is a nonlinear (not necessarily linear) dynamic process which can be understood only by appropriately quantifying the vital parameters that govern these dynamics.
Arthropods As Vectors Of Emerging Diseases
DOWNLOAD
Author : Heinz Mehlhorn
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-07-05
Arthropods As Vectors Of Emerging Diseases written by Heinz Mehlhorn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-07-05 with Science categories.
Global warming and globalization are the buzzwords of our time. They have nearly reached a religious status and those who deny their existence are considered modern heretics. Nevertheless, the earth has become an overcrowded village, traversable within a single day. Thus it is hardly surprising that besides persons and goods also agents of disease are easily transported daily from one end of the world to the other, threatening the health and lives of billions of humans and their animals. Agents of diseases (prions, viruses, bacteria, fungi and parasites) are not only transmitted by body contact or direct exchange of bodily fluids, but also by means of vectors which belong to the groups of licking or blood-sucking arthropods (mites, ticks, insects) that live close to humans and their houses. Without a doubt the recently accelerating globalization supports the import of agents of disease into countries where they never had been or where they had long since been eradicated, leading to a false sense of living on a “safe island.” These newly imported or reintroduced diseases – called “emerging diseases” – may lead to severe outbreaks in cases where the countries are not prepared to combat them, or in cases where viruses are introduced that cannot be controlled by medications or vaccines. Arthropods are well known vectors for the spread of diseases. Thus their invasion from foreign countries and their spreading close to human dwellings must be blocked everywhere (in donor and receptor countries) using safe and effective measures. This book presents reviews on examples of such arthropod-borne emerging diseases that lurk on the fringes of our crowded megacities. The following topics show that there is an ongoing invasion of potential vectors and that control measures must be used now in order to avoid disastrous outbreaks of mass diseases.
Biological Transmission Of Disease Agents
DOWNLOAD
Author : Karl Maramorosch
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Biological Transmission Of Disease Agents written by Karl Maramorosch and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Science categories.
Biological Transmission of Disease Agents covers the proceedings of a 1960 symposium on Biological Transmission of Disease Agents, held in conjunction with the Annual Meeting of the Entomological Society of America in Atlantic City, New Jersey. This book discusses methods, approaches, and problems that contribute to the progress in basic and applied research in biological transmission. This compilation is organized into two major parts encompassing 13 chapters that cover agents of plant, animal, and human diseases. The first part of the book deals with the status and significant advances of plant viruses, and the mechanical and non-mechanical transmissions and nematode vectors of these viruses. The second part starts with a discussion on viral agents known to be mosquito-borne, their importance in animal and human disease causation, as well as the several types of biological cycles involved in their transmission. The following chapters describe groups of diseases caused by transmission of sandflies, tabanids, Tsetse-borne insects, mites, ticks, and helminths. The concluding chapter presents ways of suppressing the vectors that cause diseases, such as malaria, typhus, filariasis, dysentery, trypanosomiasis, and dengue. The book appeals to students of entomology, plant pathology, human and veterinary medicine, virology, zoology, microbiology, and other branches of biology.
Do Insects Transmit Aids
DOWNLOAD
Author : Lawrence H. Miike
language : en
Publisher:
Release Date : 1987
Do Insects Transmit Aids written by Lawrence H. Miike and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with AIDS (Disease) categories.
Biological And Environmental Control Of Disease Vectors
DOWNLOAD
Author : Mary M. Cameron
language : en
Publisher: CABI
Release Date : 2013
Biological And Environmental Control Of Disease Vectors written by Mary M. Cameron and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Medical categories.
Covering the theory and practice of non-insecticidal control of insect vectors of human disease, this book provides an overview of methods including the use of botanical biocides and insect-derived semiochemicals, with an overall focus on integrated vector management strategies. While the mainstay of malaria control programmes relies on pesticides, there is a resurgence in the research and utilisation of non-insecticidal control measures due to concerns over rapid development and spread of insecticide resistance, and long-term environmental impacts. This book provides examples of successful applications in the field and recommendations for future use.