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A Natural Solution for California's Herds: African Catfish Peptides

California's cattle producers and agricultural communities are all too familiar with the rising challenge of antibiotic resistance, making common bacterial infections harder to treat in livestock. But imagine a future where we could tackle these infections with a natural, powerful alternative. Our research points to just that: antimicrobial peptides (AMPs) found in African catfish.

We're really excited about these peptides because African catfish thrive in pathogen-rich freshwater, naturally producing these robust immune compounds in their skin mucus as a defense. This natural origin makes them highly appealing alternatives to synthetic drugs.

Predicted Safety and Potent Action

One of the most compelling aspects of these AMPs is their predicted safety for mammals. Our initial computer analyses suggest that various catfish AMPs are generally recognized as safe (GRAS). We predict they'll be absorbed in the human intestine without causing liver, brain, or heart toxicity. Furthermore, lab tests on a promising peptide, NACAP-II, confirmed it was non-hemolytic, meaning it didn't damage rabbit red blood cells—a strong indicator of its potential safety for mammalian cells.

Beyond safety, these peptides demonstrate effectiveness against problematic bacteria. One study revealed NACAP-II's strong activity against Extended-Spectrum Beta-Lactamase (ESBL)-producing Escherichia coli—a critical concern for both animal and human health due to its resistance to many common antibiotics. Another peptide, ACAP-IV, also showed antibacterial activity against E. coli and Staphylococcus aureus. We believe these AMPs work by directly disrupting bacterial cell membranes, a mechanism that makes it harder for bacteria to develop resistance compared to how they resist traditional antibiotics.

Cooperative Extension Ventura County: Page

Jacaranda

Jacaranda trees are native to Brazil. As such they should be considered a subtropical species. Here on the Central Coast, although they survive and some even flourish, they should be considered as being on the edge of their range.

Cooperative Extension Ventura County: Page

Lawn Causing Itching and Welts

Do children often come into the house itching and sometimes develop small red welts on their legs and arms? The itching is probably due to the drying of dust and sweat on the skin, but the welts may have several causes. Your child(ren) may be allergic to the grass.

Cooperative Extension Ventura County: Page

Lawn Fertilization and Watering

The following are a few tips that may help you improve the looks of your lawn and be environmentally conscious as well. Many of the soils on the Central Coast are light and sandy.

Cooperative Extension Ventura County: Page

Lawn Mowing Heights

I like this topic because it gives me a chance to comment on one of my pet peeves. I see many lawns whose owners do not cut the grass at the right height. When turf grasses are cut too short, the grass is stressed, vigor is reduced, and the grass tends to die back creating bare spots.

Cooperative Extension Ventura County: Page

Lawn vs Tree

Lawn grasses are very competitive with trees and shrubs, especially young stock, for nutrients and water. Grass roots will slow down and restrict the growth of tree and shrub roots that are planted in a lawn.

Cooperative Extension Ventura County: Page

Leaf Scorch on Japanese Mapel

Marginal leaf browning or leaf scorch can be caused by several environmental stresses, which I will discuss briefly. Drought stress, a lack of water in the soil, can cause the plant to sacrifice leaf tissues in order to reduce water use.

Cooperative Extension Ventura County: Page

Lichens

Lichens are a fungus body, usually one of the Ascomycetes with apothecia, enclosing a green or blue-green alga. The fungus receives some food from the alga and the alga some food and protection from the fungus. This relationship is termed symbiotic.

Cooperative Extension Ventura County: Page

Lillies Poisonous to Cats

The genus Lilium contains many species that can cause gastric distress if ingested. Apparently, cats are super-sensitive to some of these toxins. Many plants in nature have evolved defense mechanisms to ward off or resist predation by whatever wishes to consume them.

Cooperative Extension Ventura County: Page

Living with Oaks

There are indeed some special factors to keep in mind when homeowners have established oaks on their property or are considering incorporating oaks into an existing landscape. There are twelve species of oak ( Quercus sp.) that are found on the Central Coast. Some, the live oaks, are evergreen.

Cooperative Extension Ventura County: Page

Moss

Mosses are primitive, non-flowering, rootless green plants with simple stems and leaves. They produce a thread-like growth that forms a fine-textured mat on soil or lawn surfaces.