Isolation and characterization of plasmid DNA fromRuminococcus

1987 ◽  
Vol 16 (2) ◽  
pp. 97-100 ◽  
Author(s):  
Roderick V. Asmundson ◽  
William J. Kelly
Gene ◽  
2005 ◽  
Vol 351 ◽  
pp. 143-148 ◽  
Author(s):  
Hiroyuki Azakami ◽  
Hiromi Akimichi ◽  
Masakatsu Usui ◽  
Hiromichi Yumoto ◽  
Shigeyuki Ebisu ◽  
...  

1985 ◽  
Vol 48 (12) ◽  
pp. 1028-1035 ◽  
Author(s):  
DENNIS A. ROMERO ◽  
LARRY L. McKAY

Isolation and characterization of a Lactobacillus species capable of proper acid production in a sausage environment is described. The isolate from sausage, categorized as a lactobacillus in the subgenus Streptobacterium, was designated Lactobacillus sp. DR1. Growth occurred at 5 and 42°C but not at 45°C. Fructose, galactose, glucose, mannose, melibiose, N-acetylglucosamine, ribose, sucrose and trehalose were fermented. Gas production from glucose was not observed. In MRS glucose broth, D(−) and L(+) lactic acid were produced. Lactobacillus sp. DR1 contained a single cryptic plasmid of approximately 30 megadaltons (Mdal). In sausage fermentation trials, both Lactobacillus sp. DR1 and plasmid-free derivative DR1C lowered the pH to below 5.3 after 8 h in the smokehouse. Conjugation was demonstrated through the transfer of plasmid pAMβ1, which encodes erythromycin resistance, from Streptococcus lactis 2301β to Lactobacillus sp. DR1. Mutanolysin-generated protoplasts could be regenerated using 0.5 M ammonium chloride, lactose, maltose or sucrose as osmotic stabilizers. Regeneration frequencies ranged from less than 1.0% up to 35%; however, transformation of Lactobacillus sp. DR1 protoplasts by plasmid DNA in the presence of polyethylene glycol (PEG) was unsuccessful.


1991 ◽  
Vol 55 (8) ◽  
pp. 2051-2056 ◽  
Author(s):  
Kazuo KANATANI ◽  
Kazushi YOSHIDA ◽  
Takatsugu TAHARA ◽  
Hirosumi MIURA ◽  
Masaru SAKAMOTO ◽  
...  

Author(s):  
Kaitlin A. Tagg ◽  
Carola Venturini ◽  
Muhammad Kamruzzaman ◽  
Andrew N. Ginn ◽  
Sally R. Partridge

1983 ◽  
Vol 25 (4) ◽  
pp. 1158-1161 ◽  
Author(s):  
Yoshimitsu Abiko ◽  
Hideo Onose ◽  
Shigeno Saito ◽  
Hisashi Takiguchi

1991 ◽  
Vol 55 (8) ◽  
pp. 2051-2156
Author(s):  
Kazuo Kanatani ◽  
Kazushi Yoshida ◽  
Takatsugu Tahara ◽  
Hirosumi Miura ◽  
Masaru Sakamoto ◽  
...  

1970 ◽  
Vol 27 (1) ◽  
pp. 6-9 ◽  
Author(s):  
AMMA Chowdhury ◽  
M Nural Anwar

In this investigation, 12 ciprofloxacin resistant Salmonella were isolated from medical waste samples. Identified Salmonella isolates were then subjected to sensitivity analysis against five antibiotics. All the ciprofloxacin resistant Salmonella isolates were resistant to ampicillin, amoxicillin, and penicillin and were considered multidrug resistant. Growth of four ciprofloxacin resistant Salmonella from four medical samples at various concentrations (50 to 500 mg/ml) was measured. Three of four Salmonella isolates from medical samples showed growth even against 500 mg/ml of ciprofloxacin. The occurrence of these highly resistant isolates in medical samples indicated the high percentage of undigested ciprofloxacin in medical waste sample. Agarose gel electrophoresis of these 12 isolates showed no plasmid DNA band indicating that observed resistance might be chromosomal gene mediated. Key words: Hospital wastes; Salmonella; Ciprofloxacin; Multidrug resistant DOI: http://dx.doi.org/10.3329/bjm.v27i1.9160 BJM 2010; 27(1): 6-9


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