News Summary
San Diego has seen a significant increase in heartworm cases, ranking fourth in the U.S. This rise has raised concerns among pet owners about the dangers of this mosquito-borne disease, affecting primarily dogs and, less frequently, cats. With symptoms often undetectable early on, it is crucial for pet owners to pursue annual testing and preventive measures. The introduction of an invasive mosquito species further complicates the situation, highlighting the need for vigilant mosquito control and regular veterinary consultations to protect pets.
San Diego has been identified as the fourth city in the U.S. experiencing the largest increase in heartworm cases, as reported by the Center for Companion Animal Parasite Control (CACP). This ranking emerges from analyzing the most significant rise in heartworm cases, rather than the total instances within the area. The alarming trend has raised awareness and concern among pet owners regarding the risks associated with this blood parasite, primarily transmitted by infected mosquitoes.
Heartworm disease predominantly affects dogs, but it can also infect cats. The alarming aspect of this health issue is that the symptoms in dogs can start without noticeable signs, which makes early detection challenging. As the disease progresses, pet owners may observe coughing, lethargy, weight loss, and, if untreated, it could lead to death. In felines, symptoms may remain absent for extended durations. However, when they do appear, they may include coughing, asthma-like attacks, weight loss, vomiting, or even sudden death.
Currently, there is no cure for heartworm disease in cats; the available treatment options only help manage the symptoms. Fortunately, heartworm infections in cats remain relatively rare in the San Diego area. However, to safeguard pets, CACP strongly recommends annual testing, especially for pets that are not on preventive medication, to ensure they remain heartworm negative.
Pet owners looking to protect their animals can access various prevention options. These include monthly oral medications, which can also be blended with flea treatments, as well as alternatives like Proheart, a six-month injection for dogs that offers protection against heartworm. To effectively prevent heartworm disease, adhering to a regular monthly medication schedule is crucial. Missing doses could expose pets to vulnerability against this potentially deadly illness.
Compounding the heartworm issue, San Diego County is also contending with a newfound invasive mosquito species, the Australian backyard mosquito (Aedes notoscriptus), discovered in La Mesa. This presents an additional layer of risk concerning disease transmission to both pets and humans. To mitigate such risks, mosquito control measures are essential. They include eliminating standing water to eradicate potential breeding grounds and utilizing repellents to protect against mosquito bites.
According to CACP, national heartworm disease rates have surged by 20% from 2013 levels over the past five years. This increase serves as a stark reminder for pet owners to remain vigilant. It is critical to consult with veterinarians regarding suitable heartworm prevention methods tailored to individual pets’ needs and circumstances.
In conclusion, the rise in heartworm cases in San Diego underscores the importance of preventative measures for pet owners. By staying informed and proactive, pet owners can safeguard their furry companions against this hazardous disease. Regular checks and consultations with veterinary professionals play a vital role in ensuring that pets stay healthy and free from heartworm.
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Additional Resources
- San Diego Union Tribune: Heartworm Infection a Growing Threat for San Diego Pets
- Wikipedia: Heartworm
- Veterinary Practice News: Report Reveals Top 10 Heartworm Cities in the U.S.
- Google Search: Heartworm Prevention Methods
- County News Center: Invasive Aussie Mozzie Found in San Diego County
- Encyclopedia Britannica: Mosquito

Author: STAFF HERE SAN DIEGO WRITER
SAN DIEGO STAFF WRITER The SAN DIEGO STAFF WRITER represents the experienced team at HERESanDiego.com, your go-to source for actionable local news and information in San Diego, San Diego County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Comic-Con International, San Diego County Fair, and San Diego Pride Festival. Our coverage extends to key organizations like the San Diego Regional Chamber of Commerce and United Way of San Diego County, plus leading businesses in biotechnology, healthcare, and technology that power the local economy such as Qualcomm, Illumina, and Scripps Health. As part of the broader HERE network, including HEREAnaheim.com, HEREBeverlyHills.com, HERECostaMesa.com, HERECoronado.com, HEREHollywood.com, HEREHuntingtonBeach.com, HERELongBeach.com, HERELosAngeles.com, HEREMissionViejo.com, and HERESantaAna.com, we provide comprehensive, credible insights into California's dynamic landscape.