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\hypersetup{pdftitle={Survival of \textit{Listeria monocytogenes }in Traditional Sudanese Food (Tagalia)},pdfauthor={Muhanad Muhanad},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Food quality, Listeria monocytogenes },pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\begin{center}
\Large{\textbf{Survival of \textit{Listeria monocytogenes }in Traditional Sudanese Food (Tagalia)\footnote{\textbf{Contact Address:} Muhanad Muhanad, University of Khartoum, Food Hygiene and Safety, Abdalmonem Mohamed, 11111~Khartoum, Sudan, \mbox{e-mail}: \email{moh.m.a@hotmail.com}}\\[0.8ex]}}
\normalsize{\textsc{Muhanad Muhanad}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{University of Khartoum, Food Hygiene and Safety, Sudan}}}
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\index[author]{Muhanad, Muhanad}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Background: The cooling effect on growth rate of bacterial viable count, this process increase growth of some bacteria like \textit{Listeria monocytogenes} especial in the log phase.
 Healthily that means food can be deterioration and associated with food borne diseases.  







Objectives: The aim of this study is to investigate the growth and survival of \textit{Listeria monocytogenes }in the Sudanese traditional food (Tagalia)
.







Specific objectives:   



1- To identify the growth of \textit{Listeria monocytogenes} in tagalia







2- To compare the growth of \textit{Listeria monocytogenes} between tagalia and medium (brain heart infusion).







3- To determine intrinsic parameters (pH and moisture content) that influence the growth of \textit{Listeria monocytogenes} in tagalia.







4- To identify the morphological cells change of \textit{Listeria monocytogenes }during chilling condition.







Methods: 



This is a first analytical microbiological study conducted in the survival of \textit{Listeria monocytogenes} in a traditional Sudanese food like Tagalia, also the significant running this research in \textit{Listeria monocytogenes} has been involved in numerous food borne illness associated with outbreak occurred with traditional Sudanese food.







Growth curves of \textit{Listeria monocytogenes} were carried in Brain Heart Infusion (BHI) and tagalia during which the inoculated growth media, whether BHI or tagalia, were incubated under different temperatures.



The growth and survival of \textit{Listeria monocytogenes}, were studies incubation temperatures of   37\textdegree{}C, 25\textdegree{}C and at 4\textdegree{}C.








In addition to the patterns of \textit{Listeria monocytogenes} growth, the morphological changes of \textit{Listeria monocytogenes }cells during chilling were recognised under the oil immersioned lens. 







Factors affecting growth of \textit{Listeria monocytogenes }in Tagalia including pH, moisture content and ingredients were recorded all through growth curves experiments.







Results: According to this study; tagalia contents have a positive role on \textit{Listeria monocytogenes} growth.




The comparison between the growth of \textit{Listeria monocytogenes} in BHI and its growth in tagalia reveal similar growth patterns.







}

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\noindent \textbf{Keywords:} Food quality, \textit{Listeria monocytogenes}
\index[key]{Food quality}
\index[key]{Listeria monocytogenes}
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