Changing antimalarial drug resistance patterns identified by surveillance at three sites in Uganda.

: We assessed Plasmodium falciparum drug resistance markers in parasites collected in 2012, 2013, and 2015 at 3 sites in Uganda. The prevalence and frequency of parasites with mutations in putative transporters previously associated with resistance to aminoquinolines, but increased sensitivity to lumefantrine (pfcrt 76T; pfmdr1 86Y and 1246Y), decreased markedly at all sites. Antifolate resistance mutations were common, with apparent emergence of mutations (pfdhfr 164L; pfdhps 581G) associated with high-level resistance. K13 mutations linked to artemisinin resistance were uncommon and did not increase over time. Changing malaria treatment practices have been accompanied by profound changes in markers of resistance.<br/

The Aspartate-Semialdehyde Dehydrogenase of Edwardsiella ictaluri and Its Use as Balanced-Lethal System in Fish Vaccinology

asdA mutants of Gram-negative bacteria have an obligate requirement for diaminopimelic acid (DAP), which is an essential constituent of the peptidoglycan layer of the cell wall of these organisms. In environments deprived of DAP, i.e., animal tissues, they will undergo lysis. Deletion of the asdA gene has previously been exploited to develop antibiotic-sensitive strains of live attenuated recombinant bacterial vaccines. Introduction of an Asd+ plasmid into a ΔasdA mutant makes the bacterial strain plasmid-dependent. This dependence on the Asd+ plasmid vector creates a balanced-lethal complementation between the bacterial strain and the recombinant plasmid. E. ictaluri is an enteric Gram-negative fish pathogen that causes enteric septicemia in catfish. Because E. ictaluri is a nasal/oral invasive intracellular pathogen, this bacterium is a candidate to develop a bath/oral live recombinant attenuated Edwardsiella vaccine (RAEV) for the catfish aquaculture industry. As a first step to develop an antibiotic-sensitive RAEV strain, we characterized and deleted the E. ictaluri asdA gene. E. ictaluri ΔasdA01 mutants exhibit an absolute requirement for DAP to grow. The asdA gene of E. ictaluri was complemented by the asdA gene from Salmonella. Several Asd+ expression vectors with different origins of replication were transformed into E. ictaluri ΔasdA01. Asd+ vectors were compatible with the pEI1 and pEI2 E. ictaluri native plasmids. The balanced-lethal system was satisfactorily evaluated in vivo. Recombinant GFP, PspA, and LcrV proteins were synthesized by E. ictaluri ΔasdA01 harboring Asd+ plasmids. Here we constructed a balanced-lethal system, which is the first step to develop an antibiotic-sensitive RAEV for the aquaculture industry

Phage Therapy and Photodynamic Therapy: Low Environmental Impact Approaches to Inactivate Microorganisms in Fish Farming Plants

Owing to the increasing importance of aquaculture to compensate for the progressive worldwide reduction of natural fish and to the fact that several fish farming plants often suffer from heavy financial losses due to the development of infections caused by microbial pathogens, including multidrug resistant bacteria, more environmentally-friendly strategies to control fish infections are urgently needed to make the aquaculture industry more sustainable. The aim of this review is to briefly present the typical fish farming diseases and their threats and discuss the present state of chemotherapy to inactivate microorganisms in fish farming plants as well as to examine the new environmentally friendly approaches to control fish infection namely phage therapy and photodynamic antimicrobial therapy

Which factors are associated with adolescent reports of experiencing various forms of abuse at the family level in post-conflict northern Uganda?

Research assessing familial violence against adolescents, using caregiver–adolescent dyads, is limited in post-conflict settings. This study aimed to determine the prevalence and factors associated with adolescent-reported familial abuse in post-conflict northern Uganda. It also assessed the relationship between abuse subtypes and (a) beliefs supporting aggression and (b) adolescent well-being and life satisfaction. A randomly selected community-based sample of 10- to 17-year-old adolescents (54% girls) and their caregivers (N = 427 dyads) in two northern Uganda districts was used. Abuse outcomes were adolescent reported. All measures used standardized tools that have been adapted for research in resource-limited settings. Analyses used multivariable linear regressions in Stata 14/IC. Overall, physical, emotional, and sexual abuse rates were 70% (confidence interval [CI] = [65.7, 74.4]), 72% (CI = [67.4, 76.0]), and 18.0% (CI = [14.0, 21.2]), respectively. Polyvictimization was 61% (CI = [55.4, 64.7]). There were no gender differences regarding adolescent reports of physical and emotional abuse, but adolescent girls were more likely to report sexual abuse and polyvictimization than adolescent boys. All forms of adolescent-reported abuse (except sexual abuse) were associated with caregiver reports of harsh disciplinary practices. In addition, emotional abuse was associated with physical and sexual abuse. Physical abuse was associated with being an orphan and emotional abuse. Sexual abuse was associated with being a girl, older adolescent age, living in a larger household, and emotional abuse. Polyvictimization was positively associated with being an orphan, younger caregiver age, caregiver-reported poor monitoring and supervision, and higher household socioeconomic status, but negatively associated with lower parental role satisfaction. Physical and emotional (but not sexual) abuse and polyvictimization were associated with beliefs supporting aggression among adolescents. All abuse subtypes were associated with lower levels of perceived well-being and life satisfaction among adolescents in this study. Child abuse prevention programs have the potential to improve adolescent–caregiver interaction and interrupt the violence transmission cycle in this setting