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1.
Open Vet J ; 13(9): 1082-1090, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37842111

RESUMEN

Background: Camel calf's diarrhea is considered the chief economic loss in the camelid population. There is currently no vaccine licensed to prevent colibacillosis in camel calves. The new era of bacterial antibiotic resistance explains the treatment failure and the high mortality and morbidity associated with the disease. Current protective treatments have thus far limited efficacy and need to be replaced. Due to their antimicrobial properties and safety, natural products are recently finding a capital role in infection management. Aims: The current study explores Escherichia coli F17 susceptibility as a clinical strain isolated from diarrheic camel calves to a wide panel of natural products. Methods: Agar diffusion method, integrity of cell membrane, hydrophobicity of bacterial surface, biofilm assays, and motility were used to evaluate the antibacterial activity of Coffea, Retama raetam, Moringa oleifera, Juniperus phoenicea, Uritica dioica, Camellia sinensis, Lavandula angustifolia, and Cuminum cyminum extracts against isolated bacteria. Results: Interestingly, all eight tested extracts have the damaging ability of E. coli F17's cell membrane and cause the nucleic acid release after 12 hours. Escherichia coli F17 strain has the surface of hydrophobicity which changed after contact with extracts of the plant. Moreover, the motility of the studied bacteria changed after exposure to all plant extracts. Conclusion: This study demonstrated that all extracts, exempt U. dioica, can remove up to 50% biofilm of E. coli biomass as compared with the control. Natural extracts can be used as potential antimicrobial agents to mitigate diarrhea in camel calves.


Asunto(s)
Infecciones por Escherichia coli , Escherichia coli , Animales , Camelus , Infecciones por Escherichia coli/tratamiento farmacológico , Infecciones por Escherichia coli/prevención & control , Infecciones por Escherichia coli/veterinaria , Diarrea/tratamiento farmacológico , Diarrea/prevención & control , Diarrea/veterinaria , Extractos Vegetales/farmacología
2.
Trop Anim Health Prod ; 47(3): 613-8, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25547806

RESUMEN

In many mammalian species, newborns are agammaglobulinemic; thus, colostrum and milk are the main sources of early protective antibodies. These antibodies are produced in the mother's serum and transferred to mammalian glands a few days before parturition. Here, we have studied the transfer of immunity from a she-camel immunized with human serum albumin (HSA) to her calf via colostrum and milk. Our results show that HSA-specific antibodies are produced in the mother's serum and are subsequently transferred to her colostrum. These specific antibodies are then transferred by suckling to the calf. The calf serum did not contain HSA-reactive antibodies at parturition and before the first feed, after suckling, a rise in reactivity was observed peaking at 24 h postpartum. The involvement of heavy chain antibodies (HCAbs) in the process of immunity transfer was also examined, and it was found that they were also transferred from the colostrum to the calf serum like conventional antibodies.


Asunto(s)
Camelus/inmunología , Calostro/inmunología , Inmunidad Materno-Adquirida , Preñez , Animales , Animales Lactantes/inmunología , Anticuerpos/sangre , Femenino , Inmunoglobulina G/sangre , Cadenas Pesadas de Inmunoglobulina/sangre , Embarazo
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