Aquificaceae

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. The whiteness in part is due to the inclusion of crystallized sulphur. In culture tends to form curving rods - as seen here. Phase contrast. Material from Dragon Creek, a thermal site in Yellowstone National Park, photograph by Jessie Cristiansen and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together as can be seen here and are visible with the naked eye as white wispy threads. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads - seen here to either side of the flowing water at the source of Nymph Creek. a thermal site within Yellowstone National Park, Photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. The whiteness in part is due to the inclusion of crystallized sulphur, seen here with associated filaments. In culture tends to form curving rods. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. The whiteness in part is due to the inclusion of crystallized sulphur, seen here with associated filaments. In culture tends to form curving rods. Careful scrutiny shows that the bacterial cells have denser inclusions. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the named eye as white wispy threads. The whiteness in part is due to the inclusion of crystallized sulphur, seen here with associated filaments. In culture tends to form curving rods. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. The whiteness in part is due to the inclusion of crystallized sulphur,. The bacteria form intimate association with the sulphur,, and a number of rod shaped cells can be seen adhering to it. Phase contrast. -Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. The bacterial filaments have denser inclusions. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone Park, photograph by Kathy Sheehan and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the named eye as white wispy threads. In culture tends to form curving rods. Phase contrast. Cultured material isolated originally from from Dragon Spring, thermal sites within Yellowstone Park, photograph by Jessie Cristiansen and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. In culture tends to form curving rods. The rods have denser regions. Phase contrast. Cultured material isolated originally from Dragon Spring, a thermal site within Yellowstone Park, photograph by Jessie Cristiansen and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. In culture tends to form curving rods. Cultured material isolated originally from Dragon Spring, a thermal site within Yellowstone National Park, photograph by Jessie Cristiansen and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. In nature, it takes the forms of filaments which collect together and are visible with the naked eye as white wispy threads. In culture tends to form curving rods. The rods have denser regions. Phase contrast. Cultured material isolated originally from Dragon Spring, a thermal site within Yellowstone National Park, photograph by Jessie Cristiansen and David Patterson.

Hydrogenobacter acidophilus (high-dro-jen-owe-back-ter ass-sid-off-ill-us) is found at some of the hottest regions, often above 60 degrees C. This image shows the filaments associated with crystalline deposits of sulphur. Material from Nymph Creek, a thermal site within Yellowstone Park, photograph by Kathy Sheehan and David Patterson.

Thermocrinis, a filamentous prokaryote that occurs in the same habitats as Thermus. Image courtesy of the National Park Service.

Hydrogenobaculum is a thermophilic archaebacterium that forms long, creamy streamers in the 70 degrees C, acidic water of Nymph Creek.

Hydrogenobaculum, with inorganic material (mostly sulfur) deposited around the filaments.

Hydrogenobaculum forms thin white filaments at Mammoth Springs.

Sulfur deposits can be seen among the filaments formed by Hydrogenobaculum.

Hydrogenobaculum usually is found in the form of filaments, but short motile rods may occur.