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African Journal of
Microbiology Research Vol. 1 (4), 042-045,
September, 2007
ISSN 1996-0808 © 2007 Academic Journals
Full Length
Research Paper
Fate of Salmonella typhimurium on rosemary and
barley grown in fields treated with contaminated
irrigation water
Dhiaf Amel1 and Bakhrouf Amina2
1Cabinet Dr Allaya. Ouled Salah 5116.
Ksour Essef. Tunisia.
2Laboratoire de Recherche en
Microbiologie et Santé. Hôpital de
circonscription de Ksour Essef. 5180. Tunisia.
*Corresponding author. E-mail:
Hamadi.allaya@topnet.tn.
Accepted 27 August, 2007
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Animal wastes in the form of
manure frequently contain enteric pathogenic
microorganisms and land spreading can
lead to pathogen entry into the food
chain. Therefore, the aim of the present study
was to determine the persistence of Salmonella enterica serovar typhimurium in soil, and on
barley and rosemary plants. We observed that
Salmonella typhimurium persisted for an
extended period of time (203 to 231 days),
and could be detected on infected vegetative
parts of the rosemary and barley plants even
after desiccation. After approximately two
months, the colony morphology displayed a mucoid
and rugose phenotype.
Smooth colony morphology was acquired following
incubation in nutrient broth and upon isolation
from the digestive tracts of mice that had been
challenged orally with stressed S. typhimurium.
S. typhimurium was neither isolated from
vegetative parts formed after plant
contamination, nor from barley seeds and
rosemary flowers.
Key words:
Salmonella, soil, rosemary, barley,
contamination. |
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