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PubMed2005

Liquid chromatography-tandem mass spectrometry for the determination of protein-bound residues in shrimp dosed with nitrofurans.

An analytical method was developed for the determination of bound residues of the nitrofuran drugs furazolidone, nitrofurazone, furaltadone, and nitrofurantoin with a sensitivity of 1 ppb in shrimp. In this procedure, shrimp tissue is prewashed with solvents followed by overnight acid hydrolysis, during which the side chains of the bound residues are released and simultaneously derivatized with 2-nitrobenzaldehyde. After liquid-liquid extraction cleanup, the derivatives are detected and quantitated using liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) with an atmospheric pressure chemical ionization interface. The method was validated using control shrimp fortified with each side-chain analyte at 1, 2, and 4 ppb. Method accuracies were >80% with coefficients of variation of <20% for all four analytes. Tissues from dosed shrimp were assayed to demonstrate the effectiveness of the method for recovering bound residues of nitrofurans. In shrimp dosed with nitrofurans, nitrofurantoin exhibited the lowest level of bound residues.

Animals↗
PubMed2001

Transference of dietary veterinary drugs into eggs.

Twelve veterinary drugs, bacitracin (BC), chloramphenicol (CAP), chlortetracycline (CTC), oxytetracycline (OTC), tylosin (TS), amprolium (APL), furazolidone (FZD), nicarbazine (NCZ), ormetoprium (OMP), sulfadimidine (SDD), sulfadimethoxine (SDM) and sulfamonomethoxine (SMM) were fed to laying hens for 14 days, each at a dietary concentration of 500 mg/kg. The concentrations of the drugs in the eggs from these birds were determined at 2-day intervals for 14 days after the start of feeding. The relationship between the concentrations of the drugs (mg/kg) in the eggs and the number of days after the start of feeding was analysed by regression and covariance analyses. The concentrations of the drugs in the eggs became constant after 4 days for OTC, TS, FZD and all the sulfonamides, and after 6 days for CAP, APL, NCZ and OMP. No BC or CTC was detected in the eggs. The transfer rates of the 10 drugs (excluding BC and CTC) from the feed to eggs varied from 0.005% for TS up to 1.540% for SDD.

Albumins↗
PubMed2003

Review article: the treatment of refractory Helicobacter pylori infection.

The occurrence of refractory Helicobacter pylori infection is increasing. When the bacteria are not eradicated it means that the antibiotics have not reached the gastric mucosa at a sufficient concentration and over a sufficient time lapse to kill them. The main reasons for this are poor patient compliance, resistant bacteria, low gastric pH and a high bacterial load. Therefore, when administering a new treatment, it is important to choose antibiotics which do not face resistance problems and which increase the dosage of antisecretory drugs and the duration of treatment and, if possible, to add a topical agent such as bismuth salt. The recommended empirical strategy is to prescribe quadruple therapy or, alternatively, 2-week triple therapy including amoxicillin-metronidazole, tetracycline-metronidazole or amoxicillin-rifabutin. However, when H. pylori is susceptible, clarithromycin can still be used. In the case of a high level of metronidazole resistance, furazolidone can be employed. In each case, it is important to ensure good patient compliance, and counselling is helpful in this regard. However, the best approach remains the prevention of refractory H. pylori infection and, for this purpose, antimicrobial susceptibility testing before first-line therapy is important and should be encouraged.

Anti-Bacterial Agents↗
PubMed1998

Antibiotic susceptibility of potentially probiotic Bifidobacterium isolates from the human gastrointestinal tract.

Sixteen Bifidobacterium isolates from the human gastrointestinal tract were assayed for susceptibility to 44 antibiotics by soft agar overlay disc diffusion on TPY agar. Five isolates (3/7 B. bifidum and 2/3 B. breve) exhibited atypical antibiotic susceptibility profiles. Poor growth in the agar overlay accounted for susceptibility of B. bifidum but not B. breve isolates. All other isolates were resistant to cefoxitin (30 micrograms), aztreonam (30 micrograms), vancomycin (30 micrograms), amikacin (30 micrograms), gentamicin (10 micrograms), kanamycin (30 micrograms), streptomycin (10 micrograms), fusidic acid (10 micrograms), trimethoprim (5 micrograms), norfloxacin (10 micrograms), nalidixic acid (30 micrograms), metronidazole (5 micrograms), polymyxin B (300 micrograms) and colistin sulphate (10 micrograms), and they were susceptible to the six penicillins studied, cephalothin (30 micrograms), cefuroxime (30 micrograms), cefaclor (30 micrograms), ceftizoxime (30 micrograms), cefotaxime (30 micrograms), bacitracin (10 micrograms), chloramphenicol (30 micrograms), erythromycin (15 micrograms), clindamycin (2 micrograms), rifampicin (5 micrograms) and nitrofurantoin (300 micrograms). In addition, they varied in their susceptibility to cephradine (30 micrograms), cephazolin (30 micrograms), cefoperazone (75 micrograms), ceftriaxone (30 micrograms), ofloxacin (5 micrograms) and furazolidone (15 micrograms). They were resistant, or only marginally moderately susceptible, to ceftazidime (30 micrograms), netilmicin (10 micrograms), sulphamethoxazole (100 micrograms), cotrimoxazole (25 micrograms) and ciprofloxacin (5 micrograms), and susceptible or marginally moderately susceptible to tetracycline (30 micrograms). All B. bifidum isolates were susceptible to cefixime (5 micrograms). Four microorganism-drug combinations were evaluated for beta-lactamase activity but its absence suggested that cell wall impermeability was responsible for cephalosporin resistance among bifidobacteria. The antibiotic susceptibility of B. animalis 25527T was similar to that of the human isolates.

Anti-Bacterial Agents↗
PubMed2003

Prevalence of bacterial faecal pathogens in separated and unseparated stored pig slurry.

AIMS: To examine the prevalence and diversity of bacterial faecal pathogens in unseparated slurry, separated solids and liquid fractions from a commercial pig farm. METHODS: A total of 43 stored slurry specimens originating from a fattening house over the period February-April 2002 were analysed, consisting of unseparated (n = 14) slurry, separated solids (n = 16) and separated liquid (n = 13). Specimens were examined for the presence of five bacterial pathogens including Salmonella spp., Shigella spp., Campylobacter spp., Escherichia coli O157 and Yersinia enterocolitica. Selective enrichment and plating methods were employed for detection of Salmonella spp. and Campylobacter spp. and conventional selective plating techniques for the remaining genera. Antibiogram profiles to 12 antibiotic agents were obtained for all Salmonella isolates obtained. RESULTS: Salmonella spp. were identified in all components of the slurry specimens, whereas Campylobacter spp. was only recovered from the unseparated and separated liquid fractions. In both cases, the separated liquid fraction had the highest prevalence of pathogens and the separated solid fraction had the lowest prevalence. None of the slurry specimens examined were positive for E. coli O157:H7, Shigella spp. or Y. enterocolitica. Twenty-nine isolates of Salmonella were recovered from the slurry specimens, comprising seven serovars, of which Salmonella manhattan was the most prevalent, accounting for over half [15 of 29 (51.7%)] of all Salmonella isolates. Salmonella anatum, Salm. derby, Salm. give, Salm. heidelberg, Salm. simi and Salm. stanley serovars were also recovered. All Salmonella isolates were sensitive to ampicillin, augmentin (amoxicillin/clavulanic acid), chloramphenicol, ciprofloxacin, gentamicin, kanamycin and trimethoprim, but has variable resistance to tetracycline (100%), sulphonamides (84.6%), furazolidone (38.5%), nalidixic acid (15.4%) and streptomycin (15.4%). The majority (57.7%) of isolates displayed antibiotic resistance to at least two antibiotic agents, followed by 34.6% of isolates being resistant to three agents and the remainder (7.7%) being resistant to four antibiotics. SIGNIFICANCE AND IMPACT OF THE STUDY: This study demonstrated a marked reduction in the prevalence of Campylobacter and Salmonella in the solids component of separated pig slurry. The adoption of control processes such as aeration of slurry prior to its spread onto agricultural land and newer approaches to pathogen reduction should be investigated, to reduce the transmission of pathogens from pig slurry to the environment.

Animal Husbandry↗
PubMed2000

Challenges to therapy in the future.

Quadruple therapy (with a proton pump inhibitor (PPI), metronidazole, tetracycline and bismuth) is generally reserved for second-line treatment; however, studies using this regimen for 7 days have found it to be effective even in metronidazole-resistant strains. Resistance is an ongoing problem with antimicrobial therapy but considerable progress has now been made into understanding the underlying genetic mechanisms of this process. Metronidazole resistance in Europe is usually in the range of 20-30% of strains but may be as high as 70% in some countries. One genetic mechanism involved is thought to be a mutation of the rdxA gene. Macrolide resistance appears to be on the increase in Europe, varying from 1% in some countries to 13% in others. The genetic mechanism involved has been shown to be a point mutation of a ribosomal RNA. Amoxicillin resistance is an emerging problem that has an adverse effect on eradication rates in clinical practice. Resistance has been shown to be caused by the absence of one of the four binding proteins in the cell wall. Few novel antibiotics have been developed for use in eradication therapy, although rifabutin, secnidazole and furazolidone have shown some success as part of combination therapy. Alternative therapies that have been tested include mucosal protective agents which have been used in place of a PPI in some eradication regimens with some success, and the somatostatin analog, octreotide, that has been used as part of quadruple therapy in place of a PPI and produced eradication rates of approximately 88%. The ultimate challenge is still to develop a safe and effective vaccine against Helicobacter pylori. Current and future research will also focus on identifying genetic targets for therapy, adhesion molecule analogs to prevent binding of the bacterium, and urease inhibitors. The current triple therapy treatment options available for the eradication of Helicobacter pylori infection are over 90% effective in susceptible organisms and there are very few medical conditions to which we can offer such efficacious treatment. Unfortunately, the recommendations made at consensus conferences are not always put into practice and physicians in primary care may be unaware of the true efficacy of eradication therapy. Treatment is very simple: three drugs, twice a day for 1 week. The main focus for both primary care physicians and gastroenterologists should be to reinforce the need for patient compliance, otherwise we will see an increase in antibiotic resistance. Patients should be prewarned that they may experience some mild side effects and should be encouraged to complete the course of treatment. The real challenge for the future will be the management of patients who do not respond to first-line treatment. This paper will focus on potential problems with therapy, such as antibiotic resistance, and possible future solutions, such as novel antibiotics and vaccines.

Anti-Bacterial Agents↗
PubMed2002

Increased primary resistance to recommended antibiotics negatively affects Helicobacter pylori eradication.

OBJECTIVE: To evaluate the efficacy of two commonly employed treatments for Helicobacter pylori infection and the impact of bacterial resistance to antibiotics on eradication rate. METHODS: Ninety-two consecutive H. pylori-positive patients with active peptic ulcer disease were randomly enrolled to receive a 7-day treatment with either lansoprazole 30 mg plus amoxicillin 1 g and clarithromycin 500 mg [all twice a day (b.i.d.), Group A, n = 46]; or bismuth subcitrate 125 mg four times a day (q.i.d.) plus tetracycline 500 mg q.i.d and furazolidone 200 mg b.i.d. (Group B, n = 46) H. pylori status was reassessed 30 days after completion of the therapy and bacterial resistance to the antibiotics was investigated using an in vitro assay. RESULTS: Five patients from each study group were lost to follow up. Both treatments resulted in similar H. pylori eradication rate: 66-60% (per protocol), 59-52% (intention-to-treat) in Groups A and B, respectively (non significant). However, eradication improved to 79% in the absence of H. pylori resistance to clarithromycin or amoxicillin. CONCLUSION: Primary resistance to clarithromycin or amoxicillin may underscore a potentially serious problem for the eradication of H. pylori infection. Testing for bacterial resistance may become necessary to improve therapeutic efficacy.

Adult↗
PubMed2003

Mixed-infection of antibiotic susceptible and resistant Helicobacter pylori isolates in a single patient and underestimation of antimicrobial susceptibility testing.

Antibiotic resistance among Helicobacter pylori has been increasing worldwide and has begun to affect the overall efficacy of current antibiotic regimens adversely. We examined 220 pairs of H. pylori isolates obtained from both the antrum and corpus of separate patients; 109 (50%) harbored antibiotic-resistant H. pylori: amoxicillin (0.5%), clarithromycin (5.9%), furazolidone (1.4%), metronidazole (45.5%), nitrofurantoin (1.4%), and tetracycline (6.8%). Heteroresistance among the two biopsy sites from each patient was present in 41 of the 109 patients (38%) with antibiotic resistant H. pylori (e.g. 34% with resistant strains would be misclassified as susceptible if a biopsy of the antrum alone used for antimicrobial susceptibility testing). DNA fingerprinting genotype analysis was carried out on the 41 pairs of isolates with heteroresistance. While different patients had different fingerprinting patterns, each pair of isolates showed identical or similar fingerprinting patterns. These results suggest that antibiotic-resistant H. pylori typically develop from pre-existing susceptible strain rather than coinfection with a different strain. The minor differences in genotype (degeneration of genotype) seen reflect one of the processes for development of genetic diversity in H. pylori. No biopsy single site can be considered representative for antimicrobial susceptibility testing.

Anti-Bacterial Agents↗
PubMed2001

Emergence of trimethoprim-resistant Escherichia coli in healthy persons in the absence of prophylactic or therapeutic antibiotics during travel to Guadalajara, Mexico.

Thirty-nine healthy US students without diarrheal disease and who had not received prophylactic or therapeutic antibiotics were monitored for emergence of trimethoprim-resistant gram-negative fecal flora for a 3-week period after arrival in Guadalajara, Mexico. During this time period, most students showed no change in total fecal gram-negative bacteria (p > 0.05) but showed an increasing level of trimethoprim (TMP) resistance (p < 0.01) among fecal coliforms. Escherichia coli was the TMP-resistant organism isolated in 18 of 39 (46%) healthy students. These 18 TMP-resistant E. coli were also resistant to ampicillin (44%), azithromycin (11%), chloramphenicol (39%), ciprofloxacin (11%), doxycycline (89%), erythromycin (100%), furazolidone (72%), levofloxacin (17%), trimethoprim-sulfamethoxazole (89%) and trovafloxacin (17%). In the absence of prophylactic and therapeutic antibiotics, increased acquisition of TMP-resistant gram-negative fecal flora in this developing country is probably due to poor sanitary conditions and the recurrent and heavy exposure to antimicrobial-resistant indigenous flora as a result of contaminated food and drink.

Adolescent↗
PubMed1984

Prevalence and in-vitro antimicrobial sensitivity of Bordetella bronchiseptica in the nasal cavity of pigs.

The prevalence of Bordetella bronchiseptica in the nasal cavity of pigs and the in-vitro sensitivity of isolates to a variety of antimicrobial agents was investigated. B. Bronchiseptica was recovered from 372 nasal swabs collected from 1000 (37.2%) pigs slaughtered at 20-30 weeks old at an abattoir. The swabs were collected from groups of 5-206 pigs derived from 25 herds. All isolates tested against bacitracin, clindamycin, furazolidone, penicillin, spectinomycin, streptomycin and tylosin were found to be resistant. Of the 372 isolates tested against ampicillin and erythromycin 22 (6%) were sensitive to the former and 365 (98%) were moderately sensitive to the latter, the remainder were resistant. All isolates tested against neomycin and tetracycline were sensitive and with few exceptions, (2%), they were also sensitive to chloramphenicol. Overall, 259 of the 372 (70%) isolates were sensitive to sulphonamides, identical results being obtained with sulphadiazine, sulphafurazole and a trimethoprim-sulphamethoxazole combination. An association between in-vitro resistance to sulphanomides and extensive use of this group of drugs was demonstrated on three of eight farms investigated.

Journal Article↗
PubMed2007

Analysis of veterinary drug residues in fish and shrimp composites collected during the Canadian Total Diet Study, 1993-2004.

Thirty shrimp, marine fish, freshwater fish, and canned fish composite samples collected and prepared as part of the Canadian Total Diet Study were analysed for 39 different veterinary drug residues. The analyses were undertaken to obtain baseline data that could be used to estimate the dietary exposure of Canadians to these residues. The most frequently observed residue was AOZ (four out of 30 samples), the metabolite of furazolidone, at a range of 0.50 to 2.0 ng g(-1) wet weight. Other residues detected included enrofloxacin (three samples; 0.3-0.73 ng g(-1)), leucomalachite green (three samples; 0.73-1.2 ng g(-1)), oxolinic acid (two samples; 0.3-4.3 ng g(-1)), AMOZ (the metabolite of furaltadone; one sample; 0.40 ng g(-1)), chloramphenicol (one sample; 0.40 ng g(-1)), and SEM (the metabolite of nitrofurazone; one sample; 0.8 ng g(-1)). The results of this survey indicate that Canadians are exposed to low ng g-1 concentrations of some banned and unapproved veterinary drug residues via the consumption of certain fish and shrimp.

Animals↗
PubMed2000

Characterization of enterotoxigenic Escherichia coli strains in patients with travelers' diarrhea acquired in Guadalajara, Mexico, 1992-1997.

The relationship between enterotoxigenic Escherichia coli (ETEC) and travelers' diarrhea was examined in a high-risk area in 1992-1997. Toxin patterns, colonization-factor antigens (CFAs), and in vitro antimicrobial susceptibility were determined. In total, 928 US students with diarrhea acquired in Guadalajara, Mexico, were screened for enteric pathogens. Diagnosis of ETEC infection was done with oligonucleotide probes. ETEC was isolated in 19.9% of the travelers with diarrhea. CFAs were identified in 51% of the ETEC strains. The highest CFA frequency was observed among heat-stable isolates. Ampicillin, furazolidone, and sulfisoxazole resistance of ETEC increased during the study period. ETEC isolation rates and CFA patterns varied little during the 6 years of the study, which has implications for immunoprophylactic strategies. The finding that differences in the results of ribotyping and plasmid analysis change over time suggests that multiple strains of ETEC were responsible for the illness in the region studied.

Adolescent↗
PubMed2001

Cholera in the United States, 1995-2000: trends at the end of the twentieth century.

To evaluate recent trends in cholera in the United States, surveillance data from all cases of laboratory-confirmed toxigenic Vibrio cholerae O1 and O139 infection reported to the Centers for Disease Control and Prevention between 1995 and 2000 were reviewed. Sixty-one cases of cholera, all caused by V. cholerae O1, were reported. There was 1 death, and 35 (57%) of the patients were hospitalized. Thirty-seven (61%) infections were acquired outside the United States; 14 (23%) were acquired through undercooked seafood consumed in the United States, 2 (3%) were acquired through sliced cantaloupe contaminated by an asymptomatically infected food handler, and no source was identified for 8 (13%) infections. The proportion of travel-associated infections resistant to trimethoprim-sulfamethoxazole, sulfisoxazole, streptomycin, and furazolidone increased from 7 (8%) of 88 in 1990-1994 to 11 (31%) of 35 in 1995-2000. Foreign travel and undercooked seafood continue to account for most US cholera cases. Antimicrobial resistance has increased among V. cholerae O1 strains isolated from ill travelers.

Anti-Bacterial Agents↗
PubMed1997

Antimicrobial treatment of Helicobacter pylori infection.

Helicobacter pylori is susceptible to many antimicrobials, but clinically only a few are effective. Two antimicrobials with bismuth or ranitidine or a proton pump inhibitor such as omeprazole are required to achieve a cure rate of >90% and to avoid resistance, which occurs when clarithromycin or metronidazole is the single antimicrobial used. Bismuth plus metronidazole and tetracycline is effective but causes more side effects than does treatment with omeprazole, amoxicillin, and clarithromycin; metronidazole can replace clarithromycin. To ensure a high cure rate, treatment is required for 10 days, but 7-day regimens have sometimes been as successful. A course of ranitidine bismuth citrate for 28 days, given with clarithromycin for the first 14 days, cures 80%-85% of patients, but given with amoxicillin it cures only 74%. In developing countries resistance to metronidazole can reach 95%. An inexpensive regimen is bismuth subsalicylate (two tablets) plus furazolidone (100 mg), four times daily for 4 weeks; however, as this yields a cure rate of only 72%, this regimen is not truly cost-effective.

Anti-Bacterial Agents↗
PubMed1985

Mutagenicity of urine and faeces after treatment of rats with known genotoxins.

In the present study the feasibility of using mutagenic activity in faeces and urine as indicator for exposure to mutagens and carcinogens was investigated. For this purpose faeces and urine of rats treated with known genotoxins were compared for mutagenicity in the Ames test and for induction of sister chromatid exchanges (SCE test) in Chinese hamster ovary cells. Faeces and urine of animals treated with 2-acetylaminofluorene, benzidine, furazolidone, benzo[a]pyrene or cyclophosphamide were positive both in the Ames test and in the SCE test, although the effects in the latter test were less clear than in the former. Treatment with the bladder carcinogen N-nitrosodibutylamine resulted in urine that was clearly positive in the Ames test and slightly positive in the SCE test. Faeces and urine of rats were positive in the SCE and negative in the Ames test after treatment with the liver carcinogen N-nitrosodiethanolamine, and negative in the Ames test after treatment with the liver carcinogen N-nitrosodimethylamine. Urine of rats treated with N-nitrosodimethylamine was also negative in the SCE test, faeces were not tested for SCE induction. The results show that glucuronidated and non-glucuronidated mutagens can be demonstrated in faeces and urine up to several days after treatment of rats with genotoxic agents and it is concluded that examination of faeces and urine side by side enlarges the possibility of detecting exposure of the body to mutagens.

Animals↗
PubMedDate not supplied

Current practices for treatment of dysentery in rural Bangladesh.

A rural area of Bangladesh with a population of 191,000 had 643 health care providers, of whom 324 (50%) practiced allopathic (Western) medicine, 152 (24%) were spiritualists, 109 (17%) were herbalists, and 58 (9%) were homeopaths. Two hundred eight (64%) of the allopaths had no formal training, and only 18 (6%) were graduates of medical school. In a community-based study of 480 children with bloody diarrhea and 480 children with nonbloody diarrhea, allopathic treatment was the most common care provided. Furazolidone and metronidazole were the two most commonly prescribed drugs, given to 26% and 23% of children, respectively, who were seen by a practitioner. Only 25% of children had received oral rehydration therapy. We conclude that in this region of Bangladesh care of acute diarrhea is provided mostly by private medical practitioners who have little or no training; that such care currently is largely irrational; and that the provision of rational care will require the development of simple algorithms that these practitioners can implement for treatment of this disease.

Bangladesh↗
PubMed1990

Reduced heart lipid peroxidation precedes cardiac dilatation in turkeys with naturally occurring cardiomyopathy.

STUDY OBJECTIVE: The aim of the study was to determine if reduced heart lipid peroxidation in 1-2 month old turkeys with furazolidone induced dilated cardiomyopathy is drug related and model dependent, a non-specific characteristic of the dilated turkey heart, or if alterations of heart lipid peroxidation can occur prior to onset of cardiac dilatation, and therefore may be involved in its pathogenesis. DESIGN: Ventricular lipid peroxidation capacity and superoxide dismutase activity were measured in controls and in turkeys with spontaneous cardiomyopathy at various ages (newly hatched, 7-10 d, and 1-2 months) and stages of the disease. SUBJECTS: 46 turkeys with naturally occurring dilated cardiomyopathy and 29 age matched controls were used at hatch, 7-10 d, and 1-2 months of age. MEASUREMENTS AND MAIN RESULTS: Heart lipid peroxidation, measured by thiobarbituric acid reactive substances (malondialdehyde), was found to be reduced not only in the dilated hearts of 1-2 months old cardiomyopathic turkeys [114(SEM 10) v 176(21) nmol.100 mg-1 protein, p = 0.023] but also in the non-dilated hearts of 9-10 day old cardiomyopathic turkeys [135(17) v 274(35) nmol.100 mg-1 protein, p = 0.004]. Ventricular superoxide dismutase activity was similar in control and cardiomyopathic turkeys at all stages and there was the expected increase with age. In control turkeys ventricular superoxide dismutase activity in 1-2 month old birds, at 718(52) nitrite units.100 mg-1 protein, was significantly higher than values in 7-10 day old turkeys [398(31) nitrite units.100 mg-1 protein, p = 0.001]. CONCLUSIONS: Decreased lipid peroxidation capacity is present in the dilated hearts of spontaneously cardiomyopathic turkeys. However, it is also decreased in cardiomyopathic turkeys at 9-10 d (the time of highest mortality) prior to the onset of cardiac dilatation. Therefore, alterations in heart lipid composition may be involved in the pathogenesis of this cardiomyopathy and not simply a result of the cardiac dilatation/hypertrophy process.

Aging↗
PubMed1991

The in-vitro activity of drugs against Blastocystis hominis.

The development of an assay to measure the sensitivity of drugs against Blastocystis hominis using the incorporation of 3H-hypoxanthine is described. The activity of 42 compounds have been measured. Four of the 5-nitroimidazoles tested (satranidazole, S75 0400 A, flunidazole and ronidazole) were found to be more active than metronidazole, the drug commonly used to treat infections caused by B. hominis in humans. Other potentially useful compounds include emetine, furazolidone and quinacrine. Ketoconazole and iodoquinol reported to have therapeutic activity in infections caused by this parasite were found to be significantly less active than metronidazole.

Animals↗