Predicting nitrogen excretion of cattle kept under tropical and subtropical conditions using semimechanistic models.

The present study aims at evaluating whether current semimechanistic models developed for temperate cattle systems can be adopted for cattle under (sub-) tropical husbandry systems to adequately (accurately and precisely) predict total nitrogen (TN), urine nitrogen (UN), faecal nitrogen (FN) excretion and its partition into different FN fractions. Selected models were built based on the feeding recommendations for ruminants of the British (Model A), German (Model G) and French (INRA; Model I) system. Model evaluation was conducted using eight nitrogen balance studies performed in El Salvador, Kenya and Peru (n = 392 individual observations including lactating cows, heifers and steers).

Performance of Phenotypic Tests to Detect β-Lactamases in a Population of β-Lactamase Coproducing Isolates.

 This study aimed to evaluate the performance of routinely used phenotypic tests to detect β-lactamase production in isolates coproducing multiple β-lactamase types.  Commonly used phenotypic tests for the detection of extended spectrum β-lactamases (ESBL), AmpC β-lactamase, and carbapenemases were compared with detection and sequencing of β-lactamase genes (as the reference test) in 176 uropathogenic coproducing multiple β-lactamases from two hospitals in the Western Province of Sri Lanka.  Majority of the isolates (147/176, 83.

in soil and natural water bodies in rural Sri Lanka: A hidden threat to public health.

is the causative agent of the potentially fatal infection, melioidosis. This study provides the first evidence for the presence of in soil and water in Sri Lanka. Targeted sampling of soil and natural water sources was done between November 2019 and October 2020 over eight field visits encompassing the neighborhood of 28 culture and/or antibody-positive melioidosis patients in northwestern, western and southern Sri Lanka.

Antimicrobial Resistance Genes, Virulence Genes, and Associated Mobile Genetic Elements of Eight Multidrug-Resistant Isolated from Hospital-Acquired Urinary Tract Infections in Sri Lanka.

The study describes the first isolation of multidrug-resistant (MDR) ST16, ST131 (Esc), and subsp. steigerwaltii ST93 ( complex [ECC]) in Sri Lanka. Eight MDR strains of uropathogenic Enterobacterales isolated from hospital acquired urinary tract infections (UTIs) were analyzed using genomic sequencing and comparative genomics.