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Ecological and Public Health Aspects of Stable Flies (Diptera: Muscidae): Microbial Interactions

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Ecological and Public Health Aspects of Stable Flies (Diptera: Muscidae): Microbial Interactions View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by K-State Research Exchange ECOLOGICAL AND PUBLIC HEALTH ASPECTS OF STABLE FLIES (DIPTERA: MUSCIDAE): MICROBIAL INTERACTIONS by FURAHA. W. MRAMBA B.S., University of Dar-es- Salaam, 1983 M.S., University of Florida, 2002 AN ABSTRACT OF A DISSERTATION submitted in partial fulfillment of the requirements for the degree DOCTOR OF PHILOSOPHY Department of Entomology College of Agriculture KANSAS STATE UNIVERSITY Manhattan, Kansas 2006 Abstract Stable fly, Stomoxys calcitrans (L.), and house fly, Musca domestica L., are two major pests affecting both confined and pastured livestock in the United States. It costs livestock producers millions of dollars annually to reduce populations of these two pests. Control of stable flies and house flies based on chemical insecticides is only marginally effective and unsustainable in the long term due to the development of insecticide resistance. This has created a demand for alternative methods which are environmentally friendly and cost effective for the management of these pests. Information on stable fly and house fly oviposition behavior and the aggregation and segregation of their immatures may help in an integrated pest management control program for these pests. This research identified specific bacterial species from the surface of stable fly eggs which are suspected of releasing chemical cues used to induce gravid females to oviposit at sites where eggs have been deposited and inhibit additional deposition of eggs in the same habitat when it is already colonized. My research also showed that stable fly and house fly larvae tend to be aggregated in distribution, even in apparently homogenous habitats, and to be spatially segregated from each other. Finally, I evaluated the vector competence of stable flies for an emerging food-borne pathogen, Enterobacter sakazakii, showing that this fly species is potentially a good vector for this pathogen. ECOLOGICAL AND PUBLIC HEALTH ASPECTS OF STABLE FLIES (DIPTERA: MUSCIDAE): MICROBIAL INTERACTIONS by FURAHA W. MRAMBA B.S., University of Dar-es- Salaam, 1983 M.S., University of Florida, 2002 A DISSERTATION submitted in partial fulfillment of the requirements for the degree DOCTOR OF PHILOSOPHY Department of Entomology College of Agriculture KANSAS STATE UNIVERSITY Manhattan, Kansas 2006 Approved by: Approved by : ______________________________________ Co-Major Professor Co-Major Professor Alberto Broce Ludek Zurek Abstract Stable fly, Stomoxys calcitrans (L.), and house fly, Musca domestica L., are two major pests affecting both confined and pastured livestock in the United States. It costs livestock producers millions of dollars annually to reduce populations of these two pests. Control of stable flies and house flies based on chemical insecticides is only marginally effective and unsustainable in the long term due to the development of insecticide resistance. This has created a demand for alternative methods, which are environmentally friendly and cost effective for the management of these pests. Information on stable fly and house fly oviposition behavior and the aggregation and segregation of their immatures may help in an integrated pest management control program for these pests. This research identified specific bacterial species from the surface of stable fly eggs which are suspected of releasing chemical cues used to induce gravid females to oviposit at sites where eggs have been deposited and inhibit additional deposition of eggs in the same habitat when it is already colonized. My research also showed that stable fly and house fly larvae tend to be aggregated in distribution, even in apparently homogenous habitats, and to be spatially segregated from each other. Finally, I evaluated the vector competence of stable flies for an emerging food-borne pathogen, Enterobacter sakazakii, showing that this fly species is potentially a good vector for this pathogen. Table of Contents List of Figures....................................................................................................................................viii List of Tables .....................................................................................................................................xi Acknowledgment. ..............................................................................................................................xii Dedication..........................................................................................................................................xiii CHAPTER 1 - Literature Review.....................................................................................................1 List of Objectives...............................................................................................................................12 References..........................................................................................................................................13 CHAPTER 2 - The effect of microbially derived stimulants on the oviposition behavior of stable flies .....................................................................................................................................21 Abstract..............................................................................................................................................21 Introduction .......................................................................................................................................22 Materials and Methods ......................................................................................................................23 Results................................................................................................................................................28 Discussion..........................................................................................................................................32 Acknowledgements ...........................................................................................................................36 References Cited ................................................................................................................................37 CHAPTER 3 - Interspecific larval aggregation behavior of stable flies (Stomoxys calcitrans) and house flies (Musca domestica) .................................................................................49 Abstract..............................................................................................................................................49 Introduction .......................................................................................................................................50 Materials and Methods.......................................................................................................................52 vi Results ...............................................................................................................................................55 Discussion..........................................................................................................................................56 Acknowledgements............................................................................................................................58 References Cited ...............................................................................................................................59 CHAPTER 4 - Isolation of Enterobacter sakazakii from wild stable flies (Diptera: Muscidae............................................................................................................................................70 Abstract .............................................................................................................................................70 Introduction .......................................................................................................................................71 Materials and Methods ......................................................................................................................71 Results and Discussion ......................................................................................................................73 Acknowledgements ...........................................................................................................................75 References Cited ...............................................................................................................................76 CHAPTER 5 - Vector competence of stable flies, Stomoxys calcitrans (L.) (Diptera: Muscidae), for Enterobacter sakazakii ..............................................................................80 Abstract..............................................................................................................................................80 Introduction .......................................................................................................................................81 Materials and Methods.......................................................................................................................82 Results ...............................................................................................................................................85 Discussions .......................................................................................................................................87
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