Efficacy of Entomopathogenic Staphylococcus Bacteria as a Biocontrol Agent against Rhipicephalus microplus Ticks : Assessing Reproductive Inhibition and Mortality Rates

Rhipicephalus microplus is a persistent ectoparasite of cattle that causes bovine anaplasmosis and babesiosis, causing economic losses worldwide. Chemical treatment is the primary method for tick control, but the emergence of pesticide-resistant ticks is a major challenge. Alternative biocontrol strategies utilizing entomopathogenic microorganisms are being explored. This study aimed to validate the species identification and assess the efficacy of four strains of Staphylococcus bacteria (S. shinii S1 and S-2, S. succinus, and S. xylosus) previously reported as being entomopathogenic to R. microplus ticks. According to the bioassays, S. shinii S-1 exhibited the greatest degree of reproductive inhibition (47%), followed by S. succinus (44.3%) at a concentration of 1 × 108 cfu/mL. S. xylosus displayed decreased reproductive inhibition (6.3%). In an additional bioassay, S. shinii S-1 exhibited a significant larval mortality of 67.63%, followed by S. succinus with 66.75%, S. shinni S-2 with 64.61%, and S. xylosus with 28.18% mortality. The common signs of infection observed on these ticks included swelling, yellowish exudate on the hypostome, and reduced limb mobility and color change, except for S. succinus, which did not cause color changes. These bacteria were naturally found on bovine skin. However, further studies are needed to confirm their potential as promising alternatives or complementary agents to existing acaricidal compounds.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:12

Enthalten in:

Microorganisms - 12(2024), 3 vom: 11. März

Sprache:

Englisch

Beteiligte Personen:

Cossio-Bayugar, Raquel [VerfasserIn]
Arreguin-Perez, Cesar A [VerfasserIn]
Aguilar-Diaz, Hugo [VerfasserIn]
Miranda-Miranda, Estefan [VerfasserIn]

Links:

Volltext

Themen:

Cattle tick
Entomopathogenic bacteria
Journal Article
Staphylococcu xylosus
Staphylococcus shinii
Staphylococcus succinus

Anmerkungen:

Date Revised 30.03.2024

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.3390/microorganisms12030551

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM370331354