ampicillin

Summary

Summary: Semi-synthetic derivative of penicillin that functions as an orally active broad-spectrum antibiotic.

Top Publications

  1. Kaur S, Vaishnavi C, Prasad K, Ray P, Kochhar R. Comparative role of antibiotic and proton pump inhibitor in experimental Clostridium difficile infection in mice. Microbiol Immunol. 2007;51:1209-14 pubmed
    ..difficile count, toxin A and B titres and myeloperoxidase activity were significantly higher (P>0.05) in ampicillin and lansoprazole receiving groups as compared to the control and the C. difficile receiving groups...
  2. Zarogoulidis P, Kioumis I, Ritzoulis C, Petridis D, Darwiche K, Porpodis K, et al. New insights in the production of aerosol antibiotics. Evaluation of the optimal aerosol production system for ampicillin-sulbactam, meropenem, ceftazidime, cefepime and piperacillin-tazobactam. Int J Pharm. 2013;455:182-8 pubmed publisher
    ..Our results firstly indicate us indirectly that the chemical formulation of the drug is the main factor affecting the produced droplet size and secondly but closely the residual cup design. ..
  3. Hayashi T, Oue N, Sakamoto N, Anami K, Oo H, Sentani K, et al. Identification of transmembrane protein in prostate cancer by the Escherichia coli ampicillin secretion trap: expression of CDON is involved in tumor cell growth and invasion. Pathobiology. 2011;78:277-84 pubmed publisher
    ..We generated Escherichia coli ampicillin secretion trap (CAST) libraries from 2 PCa cell lines and normal prostate tissues...
  4. Gauri S, Mandal S, Pati B, Dey S. Purification and structural characterization of a novel antibacterial peptide from Bellamya bengalensis: activity against ampicillin and chloramphenicol resistant Staphylococcus epidermidis. Peptides. 2011;32:691-6 pubmed publisher
    ..The effect of this peptide on Staphylococcus epidermidis resistant to ampicillin and chloramphenicol was investigated; the MIC and MBC values were 8 ?g/ml and 16 ?g/ml, respectively...
  5. Fabbri G, Panico M, Dallolio L, Suzzi R, Ciccia M, Sandri F, et al. Outbreak of ampicillin/piperacillin-resistant Klebsiella pneumoniae in a neonatal intensive care unit (NICU): investigation and control measures. Int J Environ Res Public Health. 2013;10:808-15 pubmed publisher
    ..Six cases of primary bloodstream infections sustained by ampicillin/piperacillin-resistant Klebsiella pneumoniae were observed over a two-month period...
  6. Park C, Kim K, Shin N, Byun J, Kwon E, Lee J, et al. Genetic diversity of the ftsI gene in ?-lactamase-nonproducing ampicillin-resistant and ?-lactamase-producing amoxicillin-/clavulanic acid-resistant nasopharyngeal Haemophilus influenzae strains isolated from children in South Korea. Microb Drug Resist. 2013;19:224-30 pubmed publisher
    ..influenzae (NTHi). Of these, ?-lactamase-nonproducing ampicillin-susceptible strains accounted for 26.2%, ?-lactamase-producing-ampicillin-resistant strains for 9...
  7. Brown A, Smith K, Samuels T, Lu J, Obare S, Scott M. Nanoparticles functionalized with ampicillin destroy multiple-antibiotic-resistant isolates of Pseudomonas aeruginosa and Enterobacter aerogenes and methicillin-resistant Staphylococcus aureus. Appl Environ Microbiol. 2012;78:2768-74 pubmed publisher
    ..AgNP) were intrinsically antibacterial, whereas gold nanoparticles (AuNP) were antimicrobial only when ampicillin was bound to their surfaces...
  8. Schwaiger K, Bauer J, Hörmansdorfer S, Mölle G, Preikschat P, Kämpf P, et al. Presence of the resistance genes vanC1 and pbp5 in phenotypically vancomycin and ampicillin susceptible Enterococcus faecalis. Microb Drug Resist. 2012;18:434-9 pubmed publisher
    b>Ampicillin and vancomycin are important antibiotics for the therapy of Enterococcus faecalis infections. The ampicillin resistance gene pbp5 is intrinsic in Enterococcus faecium...
  9. Galloway Peña J, Rice L, Murray B. Analysis of PBP5 of early U.S. isolates of Enterococcus faecium: sequence variation alone does not explain increasing ampicillin resistance over time. Antimicrob Agents Chemother. 2011;55:3272-7 pubmed publisher
    Recent studies have shown that ampicillin resistance has increased steadily over the past 3 decades within U.S. Enterococcus faecium isolates...

More Information

Publications62

  1. Sakoulas G, Bayer A, POGLIANO J, Tsuji B, Yang S, Mishra N, et al. Ampicillin enhances daptomycin- and cationic host defense peptide-mediated killing of ampicillin- and vancomycin-resistant Enterococcus faecium. Antimicrob Agents Chemother. 2012;56:838-44 pubmed publisher
    We studied an ampicillin- and vancomycin-resistant Enterococcus faecium (VRE) isolate from a patient with endocarditis and bacteremia refractory to treatment with daptomycin (6 mg/kg of body weight) plus linezolid...
  2. Lorenzen J, Broll M, Kaever V, Burhenne H, Hafer C, Clajus C, et al. Pharmacokinetics of ampicillin/sulbactam in critically ill patients with acute kidney injury undergoing extended dialysis. Clin J Am Soc Nephrol. 2012;7:385-90 pubmed publisher
    The fixed antibacterial combination of ampicillin and sulbactam is frequently used for various infections. Intact kidneys eliminate approximately 71% of ampicillin and 78% of sulbactam...
  3. Rune I, Hansen C, Ellekilde M, Nielsen D, Skovgaard K, Rolin B, et al. Ampicillin-improved glucose tolerance in diet-induced obese C57BL/6NTac mice is age dependent. J Diabetes Res. 2013;2013:319321 pubmed publisher
    b>Ampicillin has been shown to improve glucose tolerance in mice. We hypothesized that this effect is present only if treatment is initiated prior to weaning and that it disappears when treatment is terminated...
  4. Al Haroni M, Skaug N, Bakken V, Cash P. Proteomic analysis of ampicillin-resistant oral Fusobacterium nucleatum. Oral Microbiol Immunol. 2008;23:36-42 pubmed publisher
    ..Penicillin-resistant F. nucleatum have been isolated from intra- and extraoral infections. This study aimed to assess ampicillin resistance in F. nucleatum by investigating the synthesis of resistance-associated proteins.
  5. Foti J, Devadoss B, Winkler J, Collins J, Walker G. Oxidation of the guanine nucleotide pool underlies cell death by bactericidal antibiotics. Science. 2012;336:315-9 pubmed publisher
  6. Wirth T, Martin M, Starbeck Miller G, Harty J, Badovinac V. Secondary CD8+ T-cell responses are controlled by systemic inflammation. Eur J Immunol. 2011;41:1321-33 pubmed publisher
  7. Ogawa T, Sato M, Yonekawa S, Nakagawa C, Uno K, Kasahara K, et al. Infective endocarditis caused by Enterococcus faecalis treated with continuous infusion of ampicillin without adjunctive aminoglycosides. Intern Med. 2013;52:1131-5 pubmed
    ..infective endocarditis caused by Enterococcus faecalis that was treated successfully with continuous infusion of ampicillin without adjunctive aminoglycosides...
  8. Witherden E, Montgomery J, Henderson B, Tristram S. Prevalence and genotypic characteristics of beta-lactamase-negative ampicillin-resistant Haemophilus influenzae in Australia. J Antimicrob Chemother. 2011;66:1013-5 pubmed publisher
    To determine the prevalence of ?-lactamase-negative ampicillin-resistant (BLNAR) Haemophilus influenzae in Australia and characterize the associated amino acid substitutions in penicillin-binding protein 3...
  9. Lin C, Hou R, Shyu C, Shia W, Lin C, Tu W. In vitro activity of mastoparan-AF alone and in combination with clinically used antibiotics against multiple-antibiotic-resistant Escherichia coli isolates from animals. Peptides. 2012;36:114-20 pubmed publisher
    ..coli isolates. In conclusion, mastoparan-AF alone or in combination with other antibiotics could be promising as alternatives for combating multiple-antibiotic-resistant E. coli in future clinical applications. ..
  10. Zhang X, Paganelli F, Bierschenk D, Kuipers A, Bonten M, Willems R, et al. Genome-wide identification of ampicillin resistance determinants in Enterococcus faecium. PLoS Genet. 2012;8:e1002804 pubmed publisher
    ..In particular, resistance to the ?-lactam antibiotic ampicillin has become ubiquitous among clinical isolates...
  11. Fouhy F, Guinane C, Hussey S, Wall R, Ryan C, Dempsey E, et al. High-throughput sequencing reveals the incomplete, short-term recovery of infant gut microbiota following parenteral antibiotic treatment with ampicillin and gentamicin. Antimicrob Agents Chemother. 2012;56:5811-20 pubmed publisher
    ..PCR to compare the gut microbiota of nine infants who underwent parenteral antibiotic treatment with ampicillin and gentamicin (within 48 h of birth), 4 and 8 weeks after the conclusion of treatment, relative to that of nine ..
  12. Liu J, Ling J, Zhang K, Huo L, Ning Y. Effect of sodium fluoride, ampicillin, and chlorhexidine on Streptococcus mutans biofilm detachment. Antimicrob Agents Chemother. 2012;56:4532-5 pubmed publisher
    ..b>Ampicillin at all concentrations tested inhibited detachment and reduced the percentage of viable biofilm-detached cells...
  13. Bech Nielsen G, Hansen C, Hufeldt M, Nielsen D, Aasted B, Vogensen F, et al. Manipulation of the gut microbiota in C57BL/6 mice changes glucose tolerance without affecting weight development and gut mucosal immunity. Res Vet Sci. 2012;92:501-8 pubmed publisher
    ..When compared to mice treated with erythromycin or the controls, treatment for five weeks with ampicillin improved glucose tolerance without significantly affecting the weight or the number of gut mucosal regulatory T ..
  14. Konaté K, Mavoungou J, Lepengué A, Aworet Samseny R, Hilou A, Souza A, et al. Antibacterial activity against ?- lactamase producing Methicillin and Ampicillin-resistants Staphylococcus aureus: Fractional Inhibitory Concentration Index (FICI) determination. Ann Clin Microbiol Antimicrob. 2012;11:18 pubmed publisher
    The present study reports the antibacterial capacity of alkaloid compounds in combination with Methicillin and Ampicillin-resistants bacteria isolated from clinical samples...
  15. Zwolinska Wcislo M, Krzysiek Maczka G, Ptak Belowska A, Karczewska E, Pajdo R, Sliwowski Z, et al. Antibiotic treatment with ampicillin accelerates the healing of colonic damage impaired by aspirin and coxib in the experimental colitis. Importance of intestinal bacteria, colonic microcirculation and proinflammatory cytokines. J Physiol Pharmacol. 2011;62:357-68 pubmed
    ..colonic damage in the presence of caused by NSAID, and 2) to assess the efficacy of antibiotic treatment with ampicillin on the process of healing of colitis...
  16. Rishi P, Preet S, Bharrhan S, Verma I. In vitro and in vivo synergistic effects of cryptdin 2 and ampicillin against Salmonella. Antimicrob Agents Chemother. 2011;55:4176-82 pubmed publisher
    ..present study was aimed at evaluating the synergism between cryptdin 2 (a Paneth cell antimicrobial peptide) and ampicillin (Amp) against Salmonella enterica serovar Typhimurium...
  17. Lee Y, Kang O, Choi J, Oh Y, Keum J, Kim S, et al. Synergistic effect of emodin in combination with ampicillin or oxacillin against methicillin-resistant Staphylococcus aureus. Pharm Biol. 2010;48:1285-90 pubmed publisher
    ..From those results we performed the checkerboard test to determine the synergism of EM in combination with ampicillin (AM) or oxacillin (OX) against all strains...
  18. de Regt M, van Schaik W, van Luit Asbroek M, Dekker H, van Duijkeren E, Koning C, et al. Hospital and community ampicillin-resistant Enterococcus faecium are evolutionarily closely linked but have diversified through niche adaptation. PLoS ONE. 2012;7:e30319 pubmed publisher
    b>Ampicillin-resistant Enterococcus faecium (ARE) has emerged as a nosocomial pathogen. Here, we quantified ARE carriage in different community sources and determined genetic relatedness with hospital ARE.
  19. Bibbal D, Dupouy V, Ferre J, Toutain P, Fayet O, Prere M, et al. Impact of three ampicillin dosage regimens on selection of ampicillin resistance in Enterobacteriaceae and excretion of blaTEM genes in swine feces. Appl Environ Microbiol. 2007;73:4785-90 pubmed
    The aim of this study was to assess the impact of three ampicillin dosage regimens on ampicillin resistance among Enterobacteriaceae recovered from swine feces by use of phenotypic and genotypic approaches...
  20. Kishii K, Chiba N, Morozumi M, Hamano Hasegawa K, Kurokawa I, Masaki J, et al. Diverse mutations in the ftsI gene in ampicillin-resistant Haemophilus influenzae isolates from pediatric patients with acute otitis media. J Infect Chemother. 2010;16:87-93 pubmed publisher
    To clarify molecular changes in beta-lactamase-nonproducing, ampicillin-resistant (BLNAR) Haemophilus influenzae, which is increasing in pediatric patients with acute otitis media (AOM) in Japan, we identified amino acid (aa) ..
  21. Yanagihara K, Fukuda Y, Seki M, Izumikawa K, Higashiyama Y, Miyazaki Y, et al. Clinical comparative study of sulbactam/ampicillin and imipenem/cilastatin in elderly patients with community-acquired pneumonia. Intern Med. 2006;45:995-9 pubmed
    To evaluate the clinical usefulness of sulbactam/ampicillin therapy for community-acquired pneumonia in the elderly...
  22. Mainardi J, Fourgeaud M, Hugonnet J, Dubost L, Brouard J, Ouazzani J, et al. A novel peptidoglycan cross-linking enzyme for a beta-lactam-resistant transpeptidation pathway. J Biol Chem. 2005;280:38146-52 pubmed
    ..Ldt(fm) homologues are encountered sporadically among taxonomically distant bacteria, indicating that ld-transpeptidase-mediated resistance may emerge in various pathogens. ..
  23. Perlin M, Clark D, McKenzie C, Patel H, Jackson N, Kormanik C, et al. Protection of Salmonella by ampicillin-resistant Escherichia coli in the presence of otherwise lethal drug concentrations. Proc Biol Sci. 2009;276:3759-68 pubmed publisher
    ..We examined whether beta-lactamase-producing Escherichia coli could protect ampicillin-sensitive cohorts of other species, particularly species that could cause human disease...
  24. Glasgow T, Young P, Wallin J, Kwok C, Stoddard G, Firth S, et al. Association of intrapartum antibiotic exposure and late-onset serious bacterial infections in infants. Pediatrics. 2005;116:696-702 pubmed
    ..Bacteria that were isolated from infected infants who had been exposed to IPA were more likely to exhibit ampicillin resistance (adjusted OR: 5.7; 95% CI: 2.3-14...
  25. Euba G, Lora Tamayo J, Murillo O, Pedrero S, Cabo J, Verdaguer R, et al. Pilot study of ampicillin-ceftriaxone combination for treatment of orthopedic infections due to Enterococcus faecalis. Antimicrob Agents Chemother. 2009;53:4305-10 pubmed publisher
    ..The ampicillin-ceftriaxone combination has recently been accepted as alternative therapy for enterococcal endocarditis...
  26. Bikels Goshen T, Landau E, Saguy S, Shapira R. Staphylococcal strains adapted to epigallocathechin gallate (EGCG) show reduced susceptibility to vancomycin, oxacillin and ampicillin, increased heat tolerance, and altered cell morphology. Int J Food Microbiol. 2010;138:26-31 pubmed publisher
    ..of cross-resistance, showing a 2, 4 and 8-fold increase in resistance towards vancomycin, oxacillin and ampicillin respectively...
  27. Miyata M, Takamatsu Y, Kuribayashi H, Yamazoe Y. Administration of ampicillin elevates hepatic primary bile acid synthesis through suppression of ileal fibroblast growth factor 15 expression. J Pharmacol Exp Ther. 2009;331:1079-85 pubmed publisher
    Administration of the antibacterial drug ampicillin (ABPC) significantly increased hepatic bile acid concentrations. In the present study, we investigated the mechanisms for the elevation of bile acid levels in ABPC-treated mice...
  28. Xu C, Lin X, Ren H, Zhang Y, Wang S, Peng X. Analysis of outer membrane proteome of Escherichia coli related to resistance to ampicillin and tetracycline. Proteomics. 2006;6:462-73 pubmed
    ..coli K-12 responded to tetracycline and ampicillin resistance for understanding of universal pathways that form barriers for antimicrobial agents...
  29. Manchanda V, Bhalla P, Sethi M, Sharma V. Treatment of enteric fever in children on the basis of current trends of antimicrobial susceptibility of Salmonella enterica serovar typhi and paratyphi A. Indian J Med Microbiol. 2006;24:101-6 pubmed
    ..in children and reports therapeutic failure to ciprofloxacin and evaluates the possible use of chloramphenicol, ampicillin, ciprofloxacin and third generation cephalosporins as first line therapy in the treatment of enteric fever in ..
  30. Prelog M, Schiefecker D, Fille M, Wurzner R, Brunner A, Zimmerhackl L. Febrile urinary tract infection in children: ampicillin and trimethoprim insufficient as empirical mono-therapy. Pediatr Nephrol. 2008;23:597-602 pubmed publisher
    ..coli against trimethoprim (TMP), trimethoprim/sulfamethoxazole (SXT) or ampicillin (AMP). Boys with ultrasound-detected renal abnormalities (n = 71) showed 14.2% Pseudomonas and 59.1% E...
  31. Sipahi O, Turhan T, Pullukcu H, Calik S, Tasbakan M, Sipahi H, et al. Moxifloxacin versus ampicillin + gentamicin in the therapy of experimental Listeria monocytogenes meningitis. J Antimicrob Chemother. 2008;61:670-3 pubmed publisher
    This study aimed to compare the antibacterial activity of moxifloxacin and ampicillin + gentamicin in the treatment of Listeria monocytogenes meningitis in a rabbit meningitis model.
  32. Cha J, Jeong M, Jeong S, Lee K. Antibacterial activity of sophoraflavanone G isolated from the roots of Sophora flavescens. J Microbiol Biotechnol. 2007;17:858-64 pubmed
    ..The sophoraflavanone G+ampicillin (AM) combination was found to have a synergistic effect against S. mutans, S. sanguinis, S. sobrinus, S...
  33. Brinkmann K, Talati A, Akbari R, Meals E, English B. Group B streptococci exposed to rifampin or clindamycin (versus ampicillin or cefotaxime) stimulate reduced production of inflammatory mediators by murine macrophages. Pediatr Res. 2005;57:419-23 pubmed
    ..We stimulated RAW 264.7 murine macrophages with a type-Ia GBS isolate in the presence of ampicillin, cefotaxime, rifampin, clindamycin, or gentamicin, singly or in combination...
  34. Caplin J, Hanlon G, Taylor H. Presence of vancomycin and ampicillin-resistant Enterococcus faecium of epidemic clonal complex-17 in wastewaters from the south coast of England. Environ Microbiol. 2008;10:885-92 pubmed
    ..Enterococcus faecium belonging to the CC17 group contained the purK-1 allele, were resistant to ampicillin and frequently ciprofloxacin, and usually contained the esp gene...
  35. Elmolla E, Chaudhuri M. Optimization of Fenton process for treatment of amoxicillin, ampicillin and cloxacillin antibiotics in aqueous solution. J Hazard Mater. 2009;170:666-72 pubmed publisher
    ..of operating conditions of the Fenton process on biodegradability improvement and mineralization of amoxicillin, ampicillin and cloxacillin antibiotics in aqueous solution...
  36. Chou C, Membrez M, Blancher F. Gut decontamination with norfloxacin and ampicillin enhances insulin sensitivity in mice. Nestle Nutr Workshop Ser Pediatr Program. 2008;62:127-37; discussion 137-40 pubmed publisher
    ..Treatment with norfloxacin and ampicillin for 2 weeks reduced the cecal bacterial DNA below the level of detection in ob/ob, diet-induced obese and ..
  37. Dugatkin L, Perlin M, Lucas J, Atlas R. Group-beneficial traits, frequency-dependent selection and genotypic diversity: an antibiotic resistance paradigm. Proc Biol Sci. 2005;272:79-83 pubmed
    ..In pairwise competition experiments between the SLAR strain and ampicillin-sensitive strains, only the SLAR strain survived in the presence of ampicillin...
  38. Henriques I, Fonseca F, Alves A, Saavedra M, Correia A. Occurrence and diversity of integrons and beta-lactamase genes among ampicillin-resistant isolates from estuarine waters. Res Microbiol. 2006;157:938-47 pubmed
    ..was to assess the occurrence and molecular diversity of beta-lactamase genes and integrons among Gram-negative ampicillin-resistant bacteria from Ria de Aveiro...
  39. Betrosian A, Frantzeskaki F, Xanthaki A, Douzinas E. Efficacy and safety of high-dose ampicillin/sulbactam vs. colistin as monotherapy for the treatment of multidrug resistant Acinetobacter baumannii ventilator-associated pneumonia. J Infect. 2008;56:432-6 pubmed publisher
    To compare the safety and efficacy of ampicillin/sulbactam (Amp/Sulb) and colistin (COL) in the treatment of multidrug resistant Acinetobacter baumannii ventilator-associated pneumonia (VAP)...
  40. Yu H, Kim K, Cha J, Kim H, Lee Y, Choi N, et al. Antimicrobial activity of berberine alone and in combination with ampicillin or oxacillin against methicillin-resistant Staphylococcus aureus. J Med Food. 2005;8:454-61 pubmed
    ..In the checkerboard dilution test, berberine markedly lowered the MICs of ampicillin and oxacillin against MRSA...
  41. Clark R, Bloom B, Spitzer A, Gerstmann D. Empiric use of ampicillin and cefotaxime, compared with ampicillin and gentamicin, for neonates at risk for sepsis is associated with an increased risk of neonatal death. Pediatrics. 2006;117:67-74 pubmed
    ..As a result, we recommended that ampicillin and gentamicin be used as empiric coverage for early-onset neonatal sepsis while culture results are awaited...
  42. Stepanauskas R, Glenn T, Jagoe C, Tuckfield R, Lindell A, King C, et al. Coselection for microbial resistance to metals and antibiotics in freshwater microcosms. Environ Microbiol. 2006;8:1510-4 pubmed
    ..assemblages, we investigated the frequency of diverse resistances in freshwater microcosms amended with Cd, Ni, ampicillin or tetracycline...
  43. Membrez M, Blancher F, Jaquet M, Bibiloni R, Cani P, Burcelin R, et al. Gut microbiota modulation with norfloxacin and ampicillin enhances glucose tolerance in mice. FASEB J. 2008;22:2416-26 pubmed publisher
    ..Results from dose-determination studies showed that a combination of norfloxacin and ampicillin, at a dose of 1 g/L, maximally suppressed the numbers of cecal aerobic and anaerobic bacteria in ob/ob mice...
  44. Shimanovich I, Rose C, Sitaru C, Brocker E, Zillikens D. Localized linear IgA disease induced by ampicillin/sulbactam. J Am Acad Dermatol. 2004;51:95-8 pubmed
    ..a patient who developed an exclusively perianal-intergluteal vesicular eruption after receiving a course of ampicillin/sulbactam...
  45. Mainardi J, Hugonnet J, Rusconi F, Fourgeaud M, Dubost L, Moumi A, et al. Unexpected inhibition of peptidoglycan LD-transpeptidase from Enterococcus faecium by the beta-lactam imipenem. J Biol Chem. 2007;282:30414-22 pubmed
    ..dd-transpeptidases by the LD-transpeptidase of Enterococcus faecium (Ldt(fm)) leads to high level resistance to ampicillin. Ldt(fm) is specific for the L-lysyl(3)-D-alanine(4) bond of peptidoglycan precursors containing a tetrapeptide ..
  46. Kohanski M, Dwyer D, Hayete B, Lawrence C, Collins J. A common mechanism of cellular death induced by bactericidal antibiotics. Cell. 2007;130:797-810 pubmed
    ..g., reca. ..
  47. Ono S, Muratani T, Matsumoto T. Mechanisms of resistance to imipenem and ampicillin in Enterococcus faecalis. Antimicrob Agents Chemother. 2005;49:2954-8 pubmed publisher
    We found ampicillin- and imipenem-resistant isolates of vanA-possessing Enterococcus faecalis with MICs of 8 to 16 microg/ml and 4 to 32 microg/ml, respectively. There have been few reports about penicillin- and imipenem-resistant E...
  48. Shuel M, Tsang R. Canadian beta-lactamase-negative Haemophilus influenzae isolates showing decreased susceptibility toward ampicillin have significant penicillin binding protein 3 mutations. Diagn Microbiol Infect Dis. 2009;63:379-83 pubmed publisher
    Nineteen beta-lactamase-negative ampicillin-resistant (BLNAR) and 2 beta-lactamase-positive amoxicillin-clavulanic acid-resistant Canadian Haemophilus influenzae strains were characterized...
  49. Merrigan M, Sambol S, Johnson S, Gerding D. New approach to the management of Clostridium difficile infection: colonisation with non-toxigenic C. difficile during daily ampicillin or ceftriaxone administration. Int J Antimicrob Agents. 2009;33 Suppl 1:S46-50 pubmed publisher
    ..to which the organisms are resistant - ceftriaxone - and an antibiotic to which they are susceptible - ampicillin - and to determine if non-toxigenic colonisation is protective against toxigenic strain challenge...
  50. Ahmed E, Mirghani O, Gerais A, Adam I. Ceftriaxone versus ampicillin/cloxacillin as antibiotic prophylaxis in elective caesarean section. East Mediterr Health J. 2004;10:277-88 pubmed
    ..out a prospective, randomized, controlled clinical trial to evaluate the clinical efficacy of ceftriaxone and ampicillin/cloxacillin prophylaxis in decreasing the frequency of post-caesarean section infection-related morbidity...
  51. Chiu C, Lee H, Tseng L, Chen C, Chia J, Su L, et al. Mechanisms of resistance to ciprofloxacin, ampicillin/sulbactam and imipenem in Acinetobacter baumannii clinical isolates in Taiwan. Int J Antimicrob Agents. 2010;35:382-6 pubmed publisher
    ..The level of adeB expression correlated with resistance to ciprofloxacin and ampicillin/sulbactam in A. baumannii isolates...
  52. Balaban N, Merrin J, Chait R, Kowalik L, Leibler S. Bacterial persistence as a phenotypic switch. Science. 2004;305:1622-5 pubmed
    ..Inherent heterogeneity of bacterial populations may be important in adaptation to fluctuating environments and in the persistence of bacterial infections. ..
  53. Mirzaagha P, Louie M, Read R, Sharma R, Yanke L, Topp E, et al. Characterization of tetracycline- and ampicillin-resistant Escherichia coli isolated from the feces of feedlot cattle over the feeding period. Can J Microbiol. 2009;55:750-61 pubmed publisher
    The objective of this study was to investigate tetracycline and ampicillin resistance in Escherichia coli isolated from the feces of 50 crossbred steers housed in 5 feedlot pens...