But the county Department of Public Health recommended a series of steps for pet owners to help prevent their animals -- and themselves -- from becoming ill.
The Venice Canals Association in July issued an alert about multiple dog deaths in the area, noting that canines were reported to have begun vomiting, having seizures and collapsing after walking in the canal area. The association reported as many as seven dog deaths and roughly a dozen illnesses.
The Department of Public Health reported that as of Friday, there have been 26 suspected canine illness cases in the area, including five deaths, with the most recent illness reported on July 30.
"Commonly reported symptoms in affected dogs include sudden and severe lethargy and weakness, lack of coordination, vomiting, tremors or seizures," according to the department.
Health officials said the Water Quality Control Board tested the canal water, algae and scum and found the presence of toxins produced by algae.
"While a definitive link to the dog illnesses has yet to be confirmed, out of an abundance of caution, the city of Los Angeles is taking proactive measures to protect the public and animal health," according to the county.
Health officials said that in humans, the toxins can cause skin rashes, eye irritation, diarrhea and vomiting. For animals, it can cause diarrhea, vomiting, convulsions and death.
City and county officials recommended that people and pets:
-- avoid swimming in the canals;
-- stay away from scum, foam and cloudy or discolored water;
-- do not use canal water for drinking or cooking;
-- do not allow pets to enter or drink the water, or to eat, touch or sniff algae, scum or debris near the water; and
-- avoid eating shellfish from the water.
People who catch fish in the water were urged to dispose of fish guts that can contain toxins, and clean and thoroughly rinse fillets with clean, fresh water -- then wash hands, tools and all surfaces afterward.
"When in doubt, do not eat the fish," officials advised.