| dc.creator | Mugnai, Riccardo | |
| dc.creator | Sattamini, Ana | |
| dc.creator | Santos, José Augusto Albuquerque dos | |
| dc.creator | Regua-Mangia, Adriana Hamond | |
| dc.date | 2016-02-22T11:19:02Z | |
| dc.date | 2016-02-22T11:19:02Z | |
| dc.date | 2015 | |
| dc.date.accessioned | 2023-09-26T21:03:24Z | |
| dc.date.available | 2023-09-26T21:03:24Z | |
| dc.identifier | MUGNAI, Riccardo; et al. A Survey of Escherichia coli and Salmonella in the Hyporheic Zone of a Subtropical Stream: Their Bacteriological, Physicochemical and Environmental Relationships. Plos One, v.10, n.6, e0129382, 16p, 2015. | |
| dc.identifier | 1932-6203 | |
| dc.identifier | https://www.arca.fiocruz.br/handle/icict/12770 | |
| dc.identifier | 10.1371/journal. pone.0129382 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/8868420 | |
| dc.description | The Hyporheic Zone is among the most important interstitial freshwater habitats, but the relationship
between biotic and abiotic factors in this zone remains under-explored. Enterobacteria
were expected to be present, but no specific studies had ever confirmed this
prediction. The aim of this study was, therefore, to evaluate the total coliforms, Escherichia
coli and Salmonella spp. in hyporheic water and to determine the relationship of the physical,
chemical and environmental factors at different depths in a rainforest stream. To this
end, thirty-six water samples were collected at three depths in sites located in the first, second
and third orders in diverse substrates. The total coliforms, Escherichia coli and Salmonella
sp. were evaluated in terms of their CFU/ml. In the interstitial samples, coliforms were
detected in 100% of the samples. The total coliform counts had higher values at intermediate
depths, while E. coli and Salmonella spp. instead had higher values at intermediate and
large depths, often reaching or exceeding the values of the surface samples. Our results revealed
that Salmonella spp. and the coliforms have different microhabitat preferences. Salmonella
spp. and coliform species prefer deposition areas, such as lateral sides of pools,
curves and bars, but they have a tendency to distribute into different depths, likely due to
temperature differences. Salmonella spp. prefer compact substrata, with fewer fluids passing
through and with upwelling areas with lower oxygen inflow. The coliform species
showed the opposite preference. Our results suggest that bacterial variation is related to environmental
factors and physical-chemical parameters within the HZ and may play a key
role in the microbial diversity and distribution in these ecosystems. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Public Library of Science | |
| dc.rights | open access | |
| dc.subject | Coliformes | |
| dc.subject | Fatores ambientais | |
| dc.subject | Escherichia coli | |
| dc.subject | Salmonella | |
| dc.subject | Hyporheic Zone | |
| dc.subject | Subtropical Stream | |
| dc.subject | Environmental factors | |
| dc.subject | Chemical factors | |
| dc.title | A Survey of Escherichia coli and Salmonella in the Hyporheic Zone of a Subtropical Stream: Their Bacteriological, Physicochemical and Environmental Relationships | |
| dc.type | Article | |
