Aeromonas species are ubiquitous bacteria in terrestrial and aquatic milieus. They are becoming renowned as enteric pathogens of serious public health concern as they acquire a number of virulence determinants that are linked with human diseases, such as gastroenteritis, soft-tissue, muscle infections, septicemia, and skin diseases. Proper sanitary procedures are essential in the prevention of the spread of Aeromonas infections. Oral fluid electrolyte substitution is employed in the prevention of dehydration, and broad-spectrum antibiotics are used in severe Aeromonas outbreaks. This review presents an overview of emerging Aeromonas infections and proposes the need for actions necessary for establishing adequate prevention measures against the infections.

This study determined the level and causes of food insecurity of 150 households, in the Eastern Cape Province of South Africa using the Household Food Insecurity Access Prevalence (HFIAP) and the Household Food Insecurity Access Scale (HFIAS). The majority (67.7 %) of the households interviewed were severely food insecure, the main cause being the abandonment of own food production. Average HFIAS for the sample was 12.41 and ranged from 0 to 27. Most households were dependent on government social grants for household food requirements rather than own food production or food purchases, using wages and remittances. Households in the study area were net purchasers of food, as is the situation in most rural households of South Africa. High levels of unemployment (97.5 %) among household heads were observed in the study areas. In times of food shortages, most households relied on borrowing from shops against future payment. Most of the food insecurity coping strategies used by the households had longterm detrimental effects. The ultimate way to improve the food security in rural South Africa is to increase per capita incomes and/or ensure that households have the resources and capacity to produce their own food through farming.

A novel bioflocculant-producing bacteria was isolated from sediment samples of Algoa Bay in the Eastern Cape Province of South Africa and the effect of culture conditions on the bioflocculant production was investigated. Analysis of the partial nucleotide sequence of the 16S rDNA of the bacteria revealed 99% similarity to Cobetia sp. L222 and the sequence was deposited in GenBank as Cobetia sp. OAUIFE (accession number JF799092). Cultivation condition studies revealed that bioflocculant production was optimal with an inoculum size of 2% (v/v), initial pH of 6.0, Mn2+ as the metal ion, and glucose as the carbon source. Metal ions, including Na+, K+, Li+, Ca2+and Mg2+ stimulated bioflocculant production, resulting in flocculating activity of above 90%. This crude bioflocculant is thermally stable, with about 78% of its flocculating activity remaining after heating at 100 °C for 25 min. Analysis of the purified bioflocculant revealed it to be an acidic extracellular polysaccharide.

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