Microbial Diversity Course 1997, MBL, Woods Hole
The intestinal tract of animals is loaded with bacteria and other microbes. We all depend on them - we would starve to death without them. Here are some examples from the hindguts of cockroaches, of termites, and from the human colon.
You are welcome to download the images. The files include annotations, providing you with some neccessary informations. If you want to see them first, click on
ann.
If you intend to publish the images please observe the copyright (names of the persons taking the pictures added in the annotations):
© 1997, Microbial Diversity
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indexLast modified: 19-Feb-98
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Pictures from the hindgut of an American Cockroach (Periplaneta americana) (no longer alive)
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A lysed ciliate (Nyctotherus ovalis) Phase contrast micrograph. |
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The same view of the ciliate, after illumination with UV-light. The blue autofluorescence indicates the presence of methane producing bacteria within the protist. |
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An almost pure culture of bacteria isolated from the hindgut. Phase contrast micrograph |
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...and from termites
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Some protozoa from the hindgut of a termite - beautiful microbes from an inconspicious insect. Phase contrast micrographs |
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Bacteria of many different shapes are sitting on the wall of the hindgut of the termite. Phase contrast micrograph ann. |
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Some of the bacteria living on the wall of the termite's hindgut produce methane, as indicated by the blue autoflourescence after illumination with UV light. |
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Microbes from the colon of Homo sapiens
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Some people produce methane daily, some don't. Those methane producing microbes show a blue autofluorescence when illuminated with UV-light. The exmples shown here are enrichments from methane positive persons. |
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A ciliate (Nyctotherus ovalis) from the hindgut of the American Cockroach (Periplaneta americana). Phase contrast micrograph. Copyright 1997 Microbial Diversity |
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Methanogenic bacteria in a ciliate from the hindgut of an American Cockroach (Periplaneta americana). Autofluorescence after illumination with UV light. Same view as roach06.jpg Copyright 1997 Microbial Diversity |
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Enrichment culture with formate (100 mM) and fumarate (100 mM) (anaerobic, N2 in the headspace) inoculated with the content of a hindgut of a subadult American Cockroach (Periplaneta americana). First transfer. Incubation temperature: room temperature. Cells are motile. Diameter of a cell: about 1 µm Phase contrast micrograph Copyright 1997 Microbial Diversity, Rolf Schauder and Ludek Zurek, 1997 |
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One of the many shapes of protozoa from the hindgut of a termite. Phase contrast micrograph Copyright 1997 Microbial Diversity |
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One of the many shapes of protozoa from the hindgut of a termite. Phase contrast micrograph Copyright 1997 Microbial Diversity |
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proto7_bg.jpg |
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One of the many shapes of protozoa from the hindgut of a termite. Phase contrast micrograph Copyright 1997 Microbial Diversity |
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Microbes of different shapes on the epithelium of the hindgut of a termite. Phase contrast micrograph. Copyright 1997 Microbial Diversity |
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Methanogenic bacteria from the epithelium of the hindgut of a termite. Autofluorescence after illumination with UV light. Copyright 1997 Microbial Diversity. |
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F-420 fluorescent methanogens adhering to particulate matter in feces. Magnification 40X1.25 Copyright 1997 Microbial Diversity, Sabine Krause and Fikry Barghuthy |
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F-420 fluorescent free methanogens in fecal enrichments Magnification 40X1.25 Copyright 1997 Microbial Diversity, Sabine Krause and Fikry Barghuthy |
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F-420 fluorescent methanogens on particulate matter in fecal enrichment cultures Magnification 40x1.25 Copyright 1997 Microbial Diversity, Sabine Krause and Fikry Barghuthy |
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F-420 flourescent methanogens in fecal enrichment cultures. Some are seen as free cells, others are seen attached to particulate matter. Magnification 40x1.25 Copyright 1997 Microbial Diversity, Sabine Krause and Fikry Barghuthy |
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