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Canine parvovirus 2 (CPV-2) is a highly contagious virus transmitted among dogs through direct or indirect contact with infected feces. The disease poses a significant risk to unvaccinated animals, particularly young dogs, where mortality rates can be high. Globally, three CPV genotypes (e.g., 2a, 2b, and 2c) are known to circulate, with all three detected in several African countries. However, no cases of CPV-2 have been reported in Côte d'Ivoire until now. In this study, 12 fecal swabs collected from young dogs were positive for CPV-2 by conventional PCR. Subsequent sequencing and phylogenetic analysis of positive amplicons revealed that three samples belonged to the CPV-2c genotype, while the remaining nine showed high similarity to a CPV-2c variant recently reported in Asia, and more specifically, Vietnam. Phylogeographic analysis indicates multiple introduction pathways of the virus into Côte d'Ivoire. This study represents the first documented report of CPV-2 in Côte d'Ivoire and will be of interest to those working in the field of canine health.

Lumpy skin disease (LSD) threatens cattle health and productivity in Ivory Coast, where limited resources for livestock management hinder disease control. Moreover, the lack of studies on its prevalence and genetic profile leaves critical gaps in understanding its epidemiology and local risk factors. This study addresses these gaps by investigating LSD viruses' prevalence, its molecular characteristic and the associated risk factors among cattle in the Poro Region of northern Ivory Coast. Using a cross-sectional design, nodule and nasal swab samples were collected from 405 cattle across 36 villages between September 2023 and December 2024 based on syndromic surveillance. The samples were analyzed PCR to confirm LSD virus presence, followed by sequencing of four viral genes: RPO30, GPCR, EEV glycoprotein, and B22R. Overall, LSD prevalence among cattle showing pox-like lesions and clinical symptoms was found to be 51.85% and varied significantly across localities, reaching 66.67% in M'bengué and 70.87% in Dikodougou. Larger herds (over 50 cattle) had a higher prevalence (76.51%) compared to smaller herds (34.72%), and transhumant herds showed increased prevalence (  < 0.001). No significant associations were identified between sex, age, or breed. Phylogenetic analysis indicated that the Ivory Coast LSDV strains clusters with other African field strains, distinct from South-East Asian and Russian recombinants. The present study shows a notable regional difference in the prevalence of LSD in cattle in Ivory Coast, with big and transhumant herds having a higher prevalence rate making the herd size and movement a major risk factor. Molecular analysis demonstrated that Ivory Coast LSD strains are in the same group with other strains found in the African field, indicating that it is necessary to take control measures within the region and provide further surveillance.

The present work is devoted to the exploration antioxidant and antiradical activity of twenty anthraquinones isolated from the Cameroonian flora at B3LYP/6-311++G(d,p) level of theory using the B3LYP/6-31 + G(d,p) geometrical data as geometry optimization starting points. The single electron transfer mechanism has been adopted to examine both biological activities. The classification of the antiradical profile to integrate the electrodonating power (ω−), electroaccepting power (ω+), donor index (Rd) and acceptor index (Ra) has been performed using the donor-acceptor map (DAM). The antioxidant and radical powers of compounds analyzed have been compared to that of two classical vitamins (vitamin C and gallic acid). The stability of each anthraquinone derivative of the molecular library has been developed according to thermodynamic and kinetic concepts. The global reactivity descriptors (GRDs; electrophilicity index (ω), electronegativity (χ), global softness (S), and global hardness (η)) have been used to analyze the reactivity. The topological analysis of optimized structures indicates that the strength of the hydrogen bonds formed is situated between 44.205 and 52.001 kJ/mol. Our B3LYP results reveal that 3-methoxy-1-vismiaquinone (in a configuration without hydrogen bond) exhibits the best antioxidant capacity in gas phase. A comparison between antioxidant performance of molecules examined and that of classical vitamins (gallic acid, caffeic acid, ferulic acid, and ascorbic acid (vitamin C)) displayed the fact that the single electron transfer (SET) mechanism is more prominent for compounds of the molecular library analyzed. In the same vein, the antiradical behaviors of anthraquinone derivatives have shown to be higher than that of gallic acid and vitamin C in gas phase and water. The 5,8-dihydroxy-2-methylantraquinone structure in a configuration bearing one hydrogen bond has been found to be the best antiradical of the series in aqueous solution.

In response to COVID-19, wastewater surveillance rapidly expanded in high-income sewered settings. However, little is known about sampling in at-risk areas without sewerage infrastructure. We developed a method to test waste effluent streams, including: identifying environmental virus detection and waste effluent locations for testing; determining appropriate sampling methods; and, safely collecting and analyzing samples. In Côte d’Ivoire, we identified waste canals from urban slum areas and liquid waste streams in chicken slaughtering markets as high risk for SARS-CoV-2 and Influenza A Virus (IAV), respectively. For 12 weeks, we sampled once per week for SARS-CoV-2 using active and passive sampling at two canals downstream of urban slum areas containing primarily human wastewater; and IAV using passive sampling at one site containing animal slaughtering wastes (in duplicate). Samples were prepared, extracted, and processed using RT-PCR in Côte d’Ivoire. Of 48 SARS-CoV-2 samples, 22 (13 active, 9 passive) tested positive (Ct values 28.2-35.1). Of 24 IAV passive samples, three (12.5%) tested positive (Ct values 29.3-32.4). We successfully used our methods to identify relevant viral pathogens with diverse host ranges and provide proof-of-concept for sampling priority pathogens in waste effluent streams. Our work provides a pathway to democratize and extend gains of wastewater surveillance to at-risk populations in non-sewered contexts without wastewater infrastructure. Further research is needed to develop waste effluent surveillance in non-sewered settings along the entire chain of understanding high-risk viral pathogens in waste effluent, including: laboratory research to understand pathogen survivability in various media; understanding where in the environment high-risk pathogens might be; determining how to sample and test various waste effluent streams; and, in establishing the collaborative partnerships and training to complete high-quality research and expand these results to additional pathogens.

The elucidation of the complexation of lapachol and its derivatives to Fe2+ cation has been done using the density functional theory (DFT). This complexation has been limited to bidentate and tridentate to Fe2+ cation. Geometry optimizations have been implemented in gas and solution phase (water, acetonitrile, chlorobenzene, benzene, and toluene) for ligands at B3LYP/6-311++G (d,p) level of theory using B3LYP/6-31+G(d,p) optimized data as starting point. But, the geometrical optimizations in solution phase of the 22 complexes analyzed of lapachol and its derivatives to Fe2+ cation were restricted to acetonitrile and benzene. The complexation energy and the metal ion affinity (MIA) have also been calculated using the B3LYP method. The results obtained indicated a proportionality between the MIA values and the retained charge on Fe2+ cation for k2-(O1,O2) modes. But, an inverse proportionality has been yielded between these two parameters for k3-(O2, C=C) tridentate modes. For k3-(O3,C=C) tridentate mode coordination, the higher stability has been obtained. In this latter tridentate coordination in gas phase, the topological analysis of complexes exhibits the fact that the electron density is concentrated between the O3 oxygen atom of the ligand attached to Fe2+ and this metal cation. Moreover, the hydrogen bond strength calculated for isolated ligands (situated between 23.92 and 30.15 kJ/mol) is in the range of normal HBs. Collectively, all the complexation processes have shown to be highly exothermic. Our results have also shown that the electron extraction from Fe2+...Lai complexes is more difficult compared to that from free ligands.