We analyzed 120421 respiratory samples from Health Region VIII for SARS-CoV-2.

Viral positivity was higher in 2020; trends differed in travelers vs. residents.

The first wave was dominated by lineages B.1.1.33, N.3, and B.1.499.

Summer resurgence included lineage N.5 and emerging Alpha and Lambda variants.

Second wave showed Gamma and Lambda co-circulation, later displaced by Delta.

Genomic surveillance in decentralized regions tracks introductions and evolution.

Immunoproteomics identified 66 immunoreactive proteins in Klebsiella pneumoniae.

An 18kDa antigenic type 1 fimbrial protein was identified by LC–MS.

Type 1 fimbriae represent potential diagnostic biomarkers and vaccine candidates.

One thousand one hundred twenty-seven invasive Streptococcus pyogenes isolates were analyzed in Argentina, 2018–2024.

emm1 predominated overall, with marked temporal fluctuations in clone diversity.

A sharp decline in diversity in 2023 coincided with dominance of emm1/emm12.

Hypervirulent lineages (M1-UK, M1-ST1319, M4NL22) were detected but showed limited expansion.

Re-diversification of emm types in 2024 highlights the value of sustained genomic surveillance.

Bacillus subtilis suppressed Fusarium oxysporum causing wilt disease in tomato.

B. subtilis significantly enhanced plant growth and performance under pathogen stress.

ISR evidenced by increased antioxidant enzymes and defense responses.

Root colonization by B. subtilis reduced disease and promoted growth.

The study demonstrates a sustainable, eco-friendly approach to manage tomato Fusarium wilt.

Integrated PCR and culture improved detection of Mycoplasma spp. in BRD calves.

Detection frequencies of individual Mycoplasma species varied among herds.

Mycoplasma bovis and M. dispar were the most frequently detected species.

Mycoplasma bovis was the predominant pathogen in affected calves.

rpoB and uvrC genes were highly conserved and supported species identification.

Rickettsia felis was detected in C. f. felis from four provinces in central Argentina.

The minimum infection rate was 13.2% for R. felis.

Samples of R. sanguineus sensu lato tested negative for Rickettsia DNA.

Our results expand the known geographic distribution of R. felis in Argentina.

First report of CC398-MSSA-ermT+ in processed foods from northeastern Argentina.

All 14 phenotypically selected isolates were positive for sau1-hsdS1 and ermT by PCR.

iMLSb phenotype increased from 2.8% (2009–2010) to 46% (2020–2024) in food isolates.

CC398-MSSA-ermT+ circulated in the region since at least 2009–2010.

Food chain identified as potential reservoir of macrolide resistance determinants.