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Purpose – The purpose of this paper is to investigate how internal social capital – as a part of the familiness resources– affects family firm performance. The social capital theory states that internal social capital within family businesses is composed of three dimensions: the structural dimension, the relational dimension, and the cognitive dimension. The aim of the paper is to study the relationship between each dimension of internal social capital and family firm performance. Design/methodology/approach – The paper employs an empirical investigation which is based on a sample of 114 Tunisian family firms. Findings – Results demonstrate that the structural and relational dimensions are positively associated with financial and non-financial family firm’s performance. However, the cognitive dimension has a significant positive effect on financial performance but not on non-financial family firm performance. Originality/value – The proposed model aims to test the direct effect of internal social capital dimensions on financial and non-financial family firm’s performance. Besides, there is a lack of empirical evidence aiming at understanding the impact of structural, cognitive and relational social capital on the performance of family firms.

Bivalves are filter-feeding animals and markers of bacterial pollution. We report a massive spread of through dominant and lineages and/or plasmid subtypes (F31:A4:B1) as well as the presence of OXA-23-producing sequence type 2 (ST2) in seafood, highlighting a direct risk for the consumer. These findings should urge authorities to consider hospital effluents, and also farm and urban effluents, as important sources of extended-spectrum-beta-lactamase (ESBL)/carbapenemase producers that filter-feeding animals can concentrate and further spread to humans.

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Aquaculture is a rapidly expanding sector in which it is important to monitor the occurrence of multi-drug resistant (MDR) bacteria. The presence of extended-spectrum β-lactamase (ESBL-) or carbapenemase-producing Enterobacterales is a commonly used indicator of the resistance burden in a given sector. In this study, 641 pieces of farmed fish (sea bream and sea bass), as well as 1075 Mediterranean clams, were analyzed. All ESBL- and carbapenemase-producing Enterobacterales collected were whole-genome sequenced. The proportion of ESBL-producing Enterobacterales was 1.4% in fish and 1.6% in clams, carried by Escherichia coli (n = 23) and Klebsiella pneumoniae (n = 4). The ESBL phenotype was exclusively due to the presence of blaCTX-M genes, the most frequent one being blaCTX-M-15. The blaCTX-M-1 gene was also identified in six E. coli, among which four were carried by IncI1/pST3 plasmids, possibly betraying an animal origin. Carbapenemases were absent in fish but identified in two K. pneumoniae isolates from clams (blaNDM-1 and blaOXA-48). Several sequence types (STs) identified were associated with human MDR clones such as E. coli ST131 and ST617, or K. pneumoniae ST307 and ST147. Our results might indicate that bacteria from hospital or farm effluents can reach the open sea and contaminate seafood and fish that are living or raised nearby. Therefore, monitoring the quality of water discharged to the sea and the presence of MDR bacteria in seafood is mandatory to ensure the quality of fishery products.

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