Survival of Aeromonas hydrophila, Aeromonas caviae and Aeromonas sobria in soil

Abstract

T h e survival of mesophilic Aeronionas spp. in soil in the presence or absence of indigenous microflora was evaluated in a laboratory study. T w o cytotoxic (Aer. /zydrophila and Aer. cazirre) and one invasive (Aer. sohrzu) clinical isolate strains were selected for this study. After contamination of sterile or unsterilized soil with the three strains of Aeromonas, the number of living cells was determined over at least 5 months. F o r all strains the survival curves were characterized by an initial re-growth followed by a slow inactivation of bacteria, with significant differences due to the presence of indigenous microflora. T h e times necessary to achieve a 9So% reduction of the initial population were > 140, 113 and 62 d in sterilized soil respectively for Aer. caviae, Aer.Igdrophilu and Aer. sobrin, while the corresponding times in unsterilized soil were 42, 38 and 11 d. All strains preserved the virulence factors for the entire period of the study. These results suggest that the soil may be an important reservoir for Aeromonas spp. and, thus, may play an important role in the epidemiology of Aeromonas-associated human infections.Grrc,spponili.nre to : l h (;io,xrii Briinili. Istitirto ill Igrme. Unizwsrta Dqli Stud1 dr llrliino.

Short communication. Isolation of Aeromonas hydrophila in piglets

“…The contaminated water and food are important sources of infection (Fontes, 2009). These bacteria persist and multiply in the soil and water, being this a factor of paramount epidemiological importance (Brandi et al, 1996). S -Haematoma.…”

Typing of Clinical and Environmental Aeromonas sp. Strains by Random Amplified Polymorphic DNA PCR, Repetitive Extragenic Palindromic PCR, and Enterobacterial Repetitive Intergenic Consensus Sequence PCR

“…They are oxidase and catalase positive, reduce nitrate to nitrite, and ferment D-glucose. These bacteria are widely spread in the environment, especially in surface water and sewage; they also occur in untreated and treated drinking water (1,2,4,18). In humans, Aeromonas spp.…”

Aeromonas simiae sp. nov., isolated from monkey faeces

“…The name Aeromonas simiae sp. nov. is proposed for these isolates; strain IBS S6874 T (=CIP 107798is the type strain.The taxonomy of the genus Aeromonas has undergone continual change, due to reclassification or extended description of existing species and addition of newly described taxa (Huys et al, 1997a(Huys et al, , 2002Pidiyar et al, 2002;Esteve et al, 2003).Members of the genus Aeromonas are widespread in environmental habitats, such as soil (Brandi et al, 1996), fresh and brackish water, sewage and wastewater (Holmes et al, 1996). They are implicated as pathogens of coldblooded animals and various mammals, including humans, where they cause severe gastroenteritis, soft-tissue infections and bacteraemia (Janda & Abbott, 1998).…”