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Journal of Applied Pharmaceutical Science Vol. 3 (04), pp. 106-110, April, 2013 Available online at http://www.japsonline.com DOI: 10.7324/JAPS.2013.3419 ISSN 2231-3354 Antibiotic Susceptibility and Molecular Analysis of Bacterial Pathogen Pasteurella Multocida Isolated from Cattle Azmat Jabeen, Mahrukh Khattak, Shahzad Munir*, Qaiser Jamal, Mubashir Hussain Department of Microbiology, Kohat University of Science and Technology, Kohat, Khyber Pakhtunkhwa, Pakistan. ARTICLE INFO ABSTRACT Article history: Pasteurella multocida is a Gram negative, non motile and coccobacillus bacterium. It has 5 strains i.e. A, B, D, Received on: 01/02/2013 E and F and 16 serotypes (1-16). In present study, we analyzed Pasteurella multocida B: 2 strains, responsible Revised on: 19/02/2013 for Hemorrhagic Septicemia (HS) in cattle, on morphological/microbial, biochemical, molecular level and to Accepted on: 15/03/2013 check the antibiotic sensitivity of the Pasteurella multocida. Microbial analysis showed that while grown on Available online: 27/04/2013 Brain Heart Infusion agar plates and Blood Agar Base Medium, grayish lustrous colonies of Pasteurella multocida were observed. Gram staining showed that Pasteurella multocida are gram negative. Microscopic Key words: observations revealed it to be coccobacillus and it was non- motile. Identification was conducted by Pasteurella multocida, conventional biochemical tests and percentage identification of Analytical Profile Index was 96 %. Antibiotic Hemorrhagic Septicemia, sensitivity with different antibiotics was checked by disk diffusion method and was found resistant to Analytical Profile Index, Augmentin, Amoxicillin and Aztreonam and was more susceptible to Ceftiofur. On molecular level its DNA Antibiotic sensitivity. was extracted and was run with marker having range from 0.5 – 10 kb. Its DNA was found heavier than 10 kb. It was concluded that accurate laboratory diagnosis of Pasteurella multocida depends on isolation and identification of suspected bacterial colonies by microscopy and biochemical tests. Molecular analysis is a successful tool for differentiation of strains in a variety of bacterial infections. INTRODUCTION be identified as unique to all strains that caused haemorrhagic septicaemia. Common Outer Membrane Proteins (OMP) bands Pasteurella multocida is an important animal pathogen, (27kDa, 34kDa and 36kDa) were common to all isolates regardless particularly causative agent of several economically significant to serotype ( Bosch et al., 2002). Lipopolysaccharide (LPS) is a veterinary diseases, which causes fowl cholera in poultry, atrophic major virulence factor and played an essential role in causing rhinitis in swine and haemorrhagic septicaemia in cattle. diseases as haemorrhagic septicaemia in buffalos. Examination of Pasteurella multocida is also a commensal of both human and Pasteurella multocida strains from different animals confirmed animal respiratory tract (Ryan and Ray, 2004). Pasteurella that LPS from Pasteurella multocida were slightly similar to multocida is a Gram-negative, non-motile, coccobacillus that is Lipopolysaccharides of Enterobacteriacae. It was reported that penicillin-sensitive and belongs to the family pasteurellacae Lipopolysaccharide was responsible for the 1-16 somatic (Kuhnert and Christensen, 2008). The production of capsular serotypes, and when examined electrophoretically the LPS was of material of Pasteurella multocida is affected by sub-minimal low molecular weight. It was confirmed that LPS of Pasteurella inhibitory concentration of antibiotics (Champlin et al., 2002). multocida was shorter than that of Enterobacteriaceae especially Complex Outer Membrane Protein (OMP) profile of more than those of Eschericia coli and Staphylococcus typhimurium 40 proteins bands was demonstrated in Pasteurella multocida (Horadagoda et al., 2001). Hemorrhagic septicemia (HS) is an isolated from haemorrhagic septicaemia cases. Correlation acute disease infecting cattle and buffalo (water & swamp) caused between the electrophoretic pattern and serotypic properties by two specific serotypes of Pasteurella multocida. The Asian of isolates were established but no one single protein band could serotype is designated B: 2, and the African serotype is E: 2 by * Corresponding Author Carter-Heddelston system, corresponding to 6: B and 6: E by Department of Microbiology, Kohat University of Science and Namioka-Carter system. Technology, Kohat, Khyber Pakhtunkhwa, Pakistan. Phone: +923459675779 © 2013 Azmat Jabeen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License -NonCommercial-ShareAlike Unported License (http://creativecommons.org/licenses/by-nc-sa/3.0/). Jabeen et al. / Journal of Applied Pharmaceutical Science 3 (04); 2013: 106-110 107 The disease is characterized by a rapid course of Inoculation into Mice edematous swelling in the throat and brisket region, swollen and Some colonies were taken with the help of wire loop in hemorrhagic lymph nodes and the presence of numerous subserous normal saline in test tube, it was shaken and its turbidity was hemorrhages. Hemorrhagic Septicemia is considered economically compared with Mac Farland standard. to be the most important bacterial disease in South-East Asia Colonies were mixed till its turbidity matched with the including Indonesia, Philippines, Thailand, Malaysia, Middle-East, standard and achieved turbidity of 0.010. Then 8 ml of this normal North-East, Central and South Africa (Verma and Jaiswal, 1998). saline was taken in syringe and injected into 2 mice. One mouse The bacterium spreads from animal to animal by aerosols, and acted as control. types of diseases it causes in buffaloes are hemorrhagic septicemia and pneumonia (Hirsh, 1989). Thus, enzootic pasteurellosis and Dissection of Mice epizootic pasteurellosis affect the livestock industry and are Dissection of mice was carried out and heart was responsible for important economic losses in cattle farming isolated. Streaking was carried out over Blood Agar Base media (Holmes et al., 1995).Accurate laboratory diagnosis of Pasteurella and Brain Heart Infusion agar and was incubated for 24 hours at multocida depends on the isolation and identification of suspected 37 °C. Afterwards gram staining was used for enumeration of bacterial colonies by microscopy and biochemical tests. Samples gram negative bacteria. taken immediately from animals after death yield almost pure cultures of Pasteurella multocida e.g. from heart blood, spleen, BIOCHEMICAL CHARACTERIZATION liver, bone marrow or lung (Townsend et al., 1998). The following antibiotic agents have proven their clinical efficacy on Following biochemical tests were carried out for Pasteurella multocida: 0penicillin, 0amoxicillin,0 (orampicillin), identification and confirmation of Pasteurella multocida. 0erythromycin,0trimethoprim/sulfamthoxazole,cephalothin,tetracy cline,ceftiofur,cefquinome,streptomycin,gentamicin,spectinomycin Oxidase Test , florfenicol, sulfonamides, tilmicosin, enrofloxacin (orother On filter paper, Oxidase reagent was poured. With the floroquinolones) and norfloxacin. The application of the advanced help of loop, Pasteurella multocida was spread over it. diagnostic techniques as electron microscope investigation, microbial and biochemical or DNA analysis of the Pasteurella Catalase Test multocida has helped a great deal in the elucidation of the Some amount of H2O2 was taken in test tube. With the virulence factors of the organism and their encounter help of wire loop, Pasteurella multocida colony was picked up and in pathogenesis, as well as help in finding new-targeted dipped into H2O2. generations of antibiotics. Therefore present study was planned to morphologically characterize Pasteurella multocida by observing Indole Test culturing characteristics and by carrying out Gram Staining With the help of loop, colony was picked up and was technique, to identify Pasteurella multocida by conducting dipped into the Indole contained in the test tube. It was mixed and different biochemical tests, to carry out percentage identification incubated for 24 hours. of the Pasteurella multocida through Analytical Profile Index (API 20 NE Strip), to check the antibiotic sensitivity of the Pasteurella Triple Sugar Iron Test (TSI) multocida for several antibiotics and to characterize the TSI agar slant was taken. With the help of wire loop, Pasteurella multocida at molecular level by DNA analysis. colony was picked up and streaked over the agar slant. It was incubated for 24 hours. METHODOLOGY Citrate Test The research project was carried out in bacteriology and With the help of straight wire, a colony was picked up virology labs of National Veterinary Laboratories, Ministry of and was streaked in a zigzag manner over the slant. Food and Livestock Islamabad. Glucose MORPHOLOGICAL/MICROBIAL ANALYSIS With the help of a loop, colony was transferred into Isolation from Mice Heart glucose test tube. It was rotated inside the test tube for proper Pasteurella multocida was isolated from mouse heart mixing. Then it was incubated for 24 hours. preserved at –20°C. That mouse was inoculated with the sample obtained from the cow from Peshawar. Sugar Test The heart was streaked over Blood Agar Base media Tests were carried out with 2% sorbitol; xylose and and Brain Heart Infusion agar media and those media maltose.1 ml of each was added to glucose media and then were incubated for 24 hours at 37°C then growth was observed. incubated for 24 hours. 108 Jabeen
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