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Quorum Sensing And Microbial Interactions In Coral Black Band Disease And Coral-Associated Bacteria, Beth L. Zimmer
Quorum Sensing And Microbial Interactions In Coral Black Band Disease And Coral-Associated Bacteria, Beth L. Zimmer
FIU Electronic Theses and Dissertations
The black band disease (BBD) microbial consortium often causes mortality of reef-building corals. Microbial chemical interactions (i.e., quorum sensing (QS) and antimicrobial production) may be involved in the BBD disease process. Culture filtrates (CFs) from over 150 bacterial isolates from BBD and the surface mucopolysaccharide layer (SML) of healthy and diseased corals were screened for acyl homoserine lactone (AHL) and Autoinducer-2 (AI-2) QS signals using bacterial reporter strains. AHLs were detected in all BBD mat samples and nine CFs. More than half of the CFs (~55%) tested positive for AI-2. Approximately 27% of growth challenges conducted among 19 isolates showed …
Black Band Disease: Elucidating Origins And Disease Mechanisms, Aaron Miller
Black Band Disease: Elucidating Origins And Disease Mechanisms, Aaron Miller
FIU Electronic Theses and Dissertations
Coral diseases were unknown in the scientific community fifty years ago. Since the discovery of a coral disease in 1965, there has been an exponential increase in the number of known coral diseases, as the abundance, prevalence, distribution, and number of host species affected has also significantly increased. Coral diseases are recognized as contributing significantly to the dramatic losses of coral cover on a global basis, particularly in the Caribbean. The apparent sudden emergence of coral diseases suggests that they may be a symptom of an overall trend associated with changing environmental conditions. However, not much evidence has been gathered …