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Relapse of rickettsial Mediterranean spotted fever and murine typhus after treatment with chloramphenicol.

In the years 1975-1984, 132 patients with rickettsial Mediterranean spotted fever and murine typhus were treated with chloramphenicol or tetracycline. Among the 24 patients who received chloramphenicol ten relapsed and one failed to respond at all. None of the 108 recipients of tetracycline suffered a relapse. It appears that tetracycline should serve as first-line therapy in several rickettsial diseases.

Mechanistic insights into the efficient degradation and detoxification of chloramphenicol by Clostridium pasteurianum DSM 525.

Chloramphenicol (CAP), a chlorinated nitroaromatic antibiotic, posed significant ecological and human health risks due to its persistence and toxicity. Although microbial degradation represented a promising remediation strategy, its practical application was often constrained by slow degradation kinetics and incomplete biotransformation. In this study, rapid and efficient CAP degradation by the Gram-positive anaerobe Clostridium pasteurianum DSM 525 was demonstrated. The strain achieved 83.6 % removal of 400 mg L-1 CAP within 8 h, and the degradation kinetics followed a first-order model (R2 ≥…

Mitigating Chloramphenicol induced liver toxicity by exploring the therapeutic potential of Astaxanthin and Quercetin.

This study investigates the efficacy of Astaxanthin and Quercetin as potential therapeutic agents for mitigating chloramphenicol-induced liver toxicity. Despite chloramphenicol's broad-spectrum antibiotic properties, its clinical utility is hampered by hepatotoxic side effects. This research assesses the impact of chloramphenicol-induced mitochondrial toxicity, reactive oxygen species (ROS) production, and gene expression alterations in HepG2 liver cells. To enhance mitochondrial sensitivity, cells were cultured in galactose-containing media and exposed to chloramphenicol (up to 3000 µmol/L) f…

Development of an Aptamer-Based Surface Plasmon Resonance Biosensor for Detecting Chloramphenicol in Milk.

Surface plasmon resonance (SPR) biosensors have been applied in various fields with the advantages of being label-free, having high specific … is, convenience in storage, and ease of labeling. In this study, an aptamer-based SPR biosensor for chloramphenicol (CAP) detection was established through optimizing the conditions of CAP aptamer immobilization and analysis procedure, including biosensor type, signal enhancement, running buffer, sample diluent, and dissociation time. The results suggested that t …

Activation of the combined hydrogen peroxide and peroxymonosulphate by lepidocrocite for chloramphenicol removal: kinetics and mechanisms.

The main compositions of pipe deposits from water distribution networks are potential iron resources, which can be used as catalysts to activate the combined hydrogen peroxide (HP) and peroxymonosulphate (PMS) system to produce reactive oxidative species (ROSs) to degrade pollutants. As a result, the degradation efficiency of chloramphenicol (CAP) in the HP/PMS dual-oxidant system could reach as high as 75.21% within 100 min with hydroxylamine (HA) assistance, and the dual-oxidant method had a wide pH applied range. To explore the mechanism of the dual-oxidant system in detail, several main af…

Клинические результаты доксициклина, азитромицина и хлорамфеникола для лечения пациентов с тяжелым тифом.

СПРАВОЧНАЯ ИНФОРМАЦИЯ: В предыдущих исследованиях проводилась оценка эффективности лечения различных антибиотиков для пациентов с мягким и умеренным тифом (ST). Однако эффективность различных антибиотиков для лечения сильного ST остается неопределенной. МЕТОДЫ: В Китае было проведено ретроспективное исследование пациентов с тяжелыми СТ. Были сопоставлены показатели эффективности обработки доксициклина, азитромицина и хлорамфеникола с использованием в качестве первичных результатов отказов в лечении и времени для отсрочек. В общей сложности было нанято 876 пациентов с тяжелым ST, которые первон

Совпадение в аннотации оригинала
BACKGROUND: Previous studies have evaluated treatment efficacy of various antibiotics for patients with mild-to-moderate scrub typhus (ST). … th severe ST was undertaken in China. The treatment efficacy rates of doxycycline, azithromycin and chloramphenicol were compared, using treatment failure and time to defervescence as primary outcomes. RESULTS: In total, 876 patients with severe ST who initially received doxycycline, azithromycin or chloramphenicol were recruited. The treatment failure rate did …

Predicting in vivo absorption of chloramphenicol in frogs using in vitro percutaneous absorption data.

BACKGROUND: Infectious disease, particularly the fungal disease chytridiomycosis (caused by Batrachochytrium dendrobatidis), is a primary cause of amphibian declines and extinctions worldwide. The transdermal route, although offering a simple option for drug administration in frogs, is complicated by the lack of knowledge regarding percutaneous absorption kinetics. This study builds on our previous studies in frogs, to formulate and predict the percutaneous absorption of a drug for the treatment of infectious disease in frogs. Chloramphenicol, a drug with reported efficacy in the treatment of …

Targeting of Wolbachia endobacteria in Litomosoides sigmodontis: comparison of tetracyclines with chloramphenicol, macrolides and ciprofloxacin.

Endobacteria of the genus Wolbachia in filarial nematodes are related to Rickettsiaceae and can be depleted by tetracycline antibiotics. Thi … LB/c mice infected with the rodent filaria Litomosoides sigmodontis were treated with erythromycin, chloramphenicol or ciprofloxacin. All drugs were well resorbed and resulted in serum levels clearly above breakpoint levels for bacteria susceptible to the respective antibiotic. However, contrary to tetracycline, none of these antibiotics depleted Wolbachia or alt …

Targeting of wolbachia endobacteria in litomosoides sigmodontis: comparison of tetracyclines with chloramphenicol, macrolides and ciprofloxacin.

Endobacteria of the genus Wolbachia in filarial nematodes are related to Rickettsiaceae and can be depleted by tetracycline antibiotics. Thi … LB/c mice infected with the rodent filaria Litomosoides sigmodontis were treated with erythromycin, chloramphenicol or ciprofloxacin. All drugs were well resorbed and resulted in serum levels clearly above breakpoint levels for bacteria susceptible to the respective antibiotic. However, contrary to tetracycline, none of these antibiotics depleted Wolbachia or alt …

Treatment of typhoid fever with azithromycin versus chloramphenicol in a randomized multicentre trial in India.

To compare the clinical and bacteriological efficacies of azithromycin and chloramphenicol for treatment of typhoid fever, 77 bacteriologically evaluable adults, with blood cultures positive for Salmonella typhi or Salmonella paratyphi A susceptible to their assigned drugs, were entered into a randomized open trial at four hospitals in India. Forty-two patients were randomized to receive azithromycin 500 mg p.o. od for 7 days and 35 to receive chloramphenicol 2-3 g p.o. od in four divided doses for 14 days. Thirty-seven patients (88%) in the azithromycin group responded with clinical cure or i…

A comparison of chloramphenicol, trimethoprim-sulfamethoxazole, and doxycycline with doxycycline alone as maintenance therapy for melioidosis.

A prospective, open, randomized, comparative treatment trial was conducted to compare the therapeutic efficacy of the conventional four-drug combination (chloramphenicol, trimethoprim-sulfamethoxazole, and doxycycline) with that of doxycycline alone in oral maintenance treatment of melioidosis. Adult Thai patients with culture-confirmed melioidosis were randomized to receive treatment with either regimen for a minimum of 12 weeks, usually following intravenous treatment of severe disease. The main outcome measure was culture-confirmed relapse. One hundred sixteen patients were enrolled; 109 ha…

Nucleotide sequence analysis and overexpression of the gene encoding a type III chloramphenicol acetyltransferase.

The gene catIII, encoding a type III enterobacterial chloramphenicol acetyltransferase, was cloned from the transmissible plasmid R387 into pBR322 and bacteriophage M13 mp8. Nucleotide sequence analysis of 1160 bp of DNA identified an open reading frame encoding a protein of 213 amino acid residues and a calculated molecular mass of 24965 Da. The predicted N-terminal sequence is identical with that determined by Edman degradation of chloramphenicol acetyltransferase purified from Escherichia coli harbouring R387. Sequences equivalent to the consensus motifs for initiation and rho-factor-indepe…

Isozyme selectivity of the inhibition of rat liver cytochromes P-450 by chloramphenicol in vivo.

The isozyme-selectivity of chloramphenicol as an inhibitor of rat liver cytochromes P-450 has been investigated. Untreated rats and rats treated with the inducers phenobarbital, beta-naphthoflavone, pregnenolone 16 alpha-carbonitrile, and clofibrate have been injected intraperitoneally with chloramphenicol, and inhibition of specific cytochrome P-450 isozymes has been assessed by monitoring the metabolism of warfarin, testosterone, isosafrole, or lauric acid in subsequently prepared hepatic microsomal preparations. Of eight major cytochrome P-450 isozymes which could be monitored in this fashi…

A double-blind comparison of clindamycin with penicillin plus chloramphenicol in treatment of septic abortion.

The responses to therapy with either clindamycin alone or penicillin plus chloramphenicol in 77 patients with septic abortions were compared in a randomized, double-blind study. Although fever index and duration of hospitalization were similar for both groups of patients, significantly more patients in the group that received clindamycin developed major complications (P less than 0.05). This is believed to result from clindamycin's lack of activity against aerobic gram-negative bacilli. Aggressive management that included early uterine evacuation and broad-spectrum antibiotics effective agains…