TY  - JOUR
T1  - Characterisation of <I>Mannheimia </I>Sp<I>.</I> and <I>P. multocida </I>Strains Isolated from Bovine Pneumonic Lungs in Two Slaughterhouses in Mexico
AU - , C.J. Jaramillo-Arango AU - , R. Hernandez-Castro AU - , V.Campuzano-Ocampo AU - , F. Suarez-Guemes AU - , R. Delgado-Gonzalez AU - , F. Trigo-Tavera 
JO  - Journal of Animal and Veterinary Advances
VL  - 6
IS  - 12
SP  - 1398
EP  - 1404
PY  - 2007
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2007.1398.1404
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2007.1398.1404
KW  - Mannheimia serotypes
KW  -P. multocida biotypes
KW  -pneumonic lung
KW  -cattle
AB  - <I>Mannheimia</I> sp. and <I>P. multocida </I>(Pm) strains were isolated from pneumonic lungs (n = 475) which were  obtained  in  two  slaughterhouses in Mexico. Isolation and phenotyping were carried out by means of <I>in vitro</I> culture, as well as biochemical and immunological tests. Of the 131 isolates 60.3% was Pm and 39.7% was <I>Mannheimia</I> sp. The isolating rate in lungs was 16.6%  for  Pm,  10.7% <I> M. haemolytica</I>  (Mh) and  0.2% <I>M. glucosida</I> (Mg) in both slaughterhouses. These differences were significant (p 0.05). Out of 52 <I>Mannheimia </I>sp<I>. </I>isolations, 98% was Mh and 1.9% Mg. Out of 51 Mh isolates 33% was of Serotype 1(S1), 17.6% S6 and 49% Non-Typable (NT). These differences were significant (p 0.05). Out of 79 Pm isolations, 98.7% was biotype A and 1.2% biotype D. These differences were significant (p 0.05). Pm got the highest rate of isolations in lungs which differs from data of previous results where Mh is considered as the most pathogenic bacteria and the most commonly associated to bovine pasteurelosis pneumonic. The highest frequency of Mh S1 and Pm biotype A confirms that these two bacteria are the most commonly found in pneumonic lungs in Mexico.
ER  -