Gentamicin and several other basic antibiotics were examined for their ability to adsorb to dog feces. It was found that 44 to 90% of all antibiotics studied were adsorbed to feces depending on the ratio of antibiotic to fecal material. Attempts to extract these antibiotics by acid treatment after adsorption onto feces were only partially successful since large portions of the bound materials w...

Levels of nonsulfated and sulfated tibolone metabolites were determined in plasma, urine, and feces from six ovariectomized, mature female cynomolgus monkeys after a single dose and multiple p.o. doses (including bile) of tibolone using validated gas chromatography/mass spectrometry and liquid chromatography/tandem mass spectrometry assays. In plasma, the predominant nonsulfated metabolite afte...

Pathogenic microorganisms can lead to serious outbreaks of foodborne illnesses, particularly if fresh produce becomes contaminated and then happens to be inappropriately handled in a manner that can incubate pathogens. Pathogenic microbial contamination of produce can occur through a variety of pathways, such as from the excrement of domesticated and wild animals, biological soil amendment, agr...

Rifapentine is a long-acting cyclopentyl-derivative of rifampin. This study was designed to investigate the mass balance and biotransformation of 14C-rifapentine in humans. Four healthy male volunteers received a single 600-mg oral dose of 14C-rifapentine in a hydroalcoholic solution. Whole blood, urine, and fecal samples were collected before and at frequent intervals after drug administration...

Study of fat absorption in a patient requires the determination of the fat content of feces. Quantitative chemical methods available for such determinations are too laborious to be practical for routine analyses. Estimation of the fat content of feces by microscopic examination, practised by many clinicians, is unreliable; this can be demonstrated by comparing the results of microscopic determi...

Background: The H9N2 subtype of the influenza virus, which is endemic in many regions of Iran, is considered as a candidate for future pandemics. In the present study, excretion time of the Iranian endemic influenza virus (H9N2 subtype) from the feces and pharyngeal secretions of laying chicken breeds was evaluated. Methods: This experimental study conducted at the Diagnostic Laboratory Scienc...

The inclusion of low phytate grains in poultry diets can reduce the phosphorus (P) content of poultry feces, but their influence on fecal P composition is not well established. To assess this, 100 male broiler chicks (21 days old) were fed dietary treatments based on either a wild-type barley or one of three low phytate mutant barleys with 59, 62 and 99% reductions in phytate P, compared with t...

Microorganisms play integral roles in the cycling of carbon (C) and nitrogen (N) in recirculating aquaculture systems (RAS) for fish and shellfish production. We quantified the pathways of shrimp fecal bacterial activities and their role in C- and N-flux partitioning relevant to culturing Pacific white shrimp, Penaeus (Litopenaeus) vannamei, in RAS. Freshly produced feces from P. vannamei conta...

The process of egg production has to be regarded as severe metabolic stress to the hen. Elevated corticosterone concentrations have been described to precede oviposition for one to two hours, but may be masked by the diurnal changes in levels of glucocorticosteroids (corticosterone, cortisol). Increased corticoid levels were discussed either to be involved in the local induction of the process ...