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This essay uses an enactive approach to map out the ways Ontario teachers, students, and parents have reimagined online mathematics education at the K-12 level during the COVID-19 pandemic. The essay highlights the importance of education researchers using an appropriate framework in understanding the emerging mathematics education realities. It encourages education researchers to pay attention to this call to action while recognizing that such an action is not without challenges. To address the challenges, education researchers must engage with the evolving mathematics education environment and community by innovating and reimagining their research tools and techniques.

Citrus virus A (CiVA) was detected for the first time in Australia in a living pathogen collection. Buds were originally collected from a Washington navel field tree prior to 1970 and graft-inoculated onto a Symons sweet orange indicator plant. The virus was detected using conventional and quantitative reverse transcription polymerase chain reactions and high-throughput sequencing. This variant shares 96.3% (RNA1) and 96.7% (RNA2) nucleotide identity with isolates of CiVA from South Africa and China, respectively. Foliar symptoms of leaf flecking and oak leaf patterns, consistent with detections of CiVA in other regions, were observed on the foliage of the original accession and inoculated indicator plants. Subsequent surveys of an Australian citrus variety collection detected a different CiVA sequence variant in two accessions of Pera sweet orange; this variant had 97% similarity to the other Australian variant.

DNA fingerprints of 30 isolates of Paenibacillus alvei were extremely variable and easily discernible. This technique could be used to track the movement of this bacterium, which infects other animals besides honeybees and is also found in soil.

A letter to the editor is presented in response to the article "A future for pathways in mental health care in Norway - a discussion paper based on El-Ghorr et al.," by E. Biringer and M. Hartveit in an issue in 2010.

Campylobacter is a common cause of bacterial gastroenteritis in Australia. Antibiotic resistance among Campylobacter is an emerging problem in Europe and the United States of America. Monitoring may detect emerging resistance. Since there is no epidemiologically validated subtyping system for Campylobacter, antimicrobial resistance patterns may prove useful as an epidemiological marker. Campylobacter isolates from residents of the Hunter region were differentiated by PCR into two categories: C. jejuni and non-C. jejuni. Minimal inhibitory concentrations (MIC) were determined for 10 antibiotics using the National Committee for Clinical Laboratory Standards (NCCLS) agar dilution methodology. Risk factor information including travel history were obtained as part of a case-control study by conducting telephone interviews with infected individuals. Sixty-four per cent, 3.4 per cent, 3.4 per cent and 11.2 per cent of C. jejuni isolates were resistant to ampicillin (at MIC > 8 mg/L), erythromycin (> 8 mg/L), nalidixic acid (> 32 mg/L) and tetracycline (> 8 mg/L), respectively. A diverse pattern of antibiotic resistance ('resistotypes') was detected with some change occurring over time. Several possible clusters of Campylobacter infections were identified based on resistotype. Of seven infections acquired during overseas travel, 57 per cent (4/7) were resistant to more than one antibiotic class compared to 10 per cent (14/144) of locally-acquired isolates (p=0.004, Fisher exact). The potential usefulness of resistotyping as an epidemiological marker is worthy of further exploration.