Landscape Epidemiology of Mosquito-Borne Canine Heartworm (Dirofilaria Immitis) in Northern California, USA I. Community-based surveys of domestic dogs in three landscapes1

The canine heartworm is a common and serious nematode parasite of domestic dogs in many parts of the world. Although nematode neuroanatomy is fairly well documented, the emphasis has been on sensory anatomy and primarily in free-living soil species and ascarids. Lee and Miller reported on the muscular anatomy in the heartworm, but provided little insight into the peripheral nervous system or myoneural relationships. The classical fine-structural description of nematode muscle innervation is Rosenbluth's earlier work in Ascaris. Since the pharmacological effects of some nematacides currently being developed are neuromuscular in nature, a better understanding of heartworm myoneural anatomy, particularly in reference to the synaptic region is warranted.

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Is canine heartworm ( Dirofilaria immitis ) endemic to South Australia?

Australian Veterinary Journal ◽

10.1111/avj.12814 ◽

2019 ◽

Vol 97 (6) ◽

pp. 191-196 ◽

Cited By ~ 4

Author(s):

EJ Dearsley ◽

RM O’Handley ◽

CGB Caraguel

Keyword(s):

Dirofilaria Immitis ◽

South Australia ◽

Canine Heartworm

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Pregnancy Outcomes in Women With Inflammatory Bowel Disease: A Large Community-Based Study From Northern California

Gastroenterology ◽

10.1053/j.gastro.2007.07.019 ◽

2007 ◽

Vol 133 (4) ◽

pp. 1106-1112 ◽

Cited By ~ 222

Author(s):

Uma Mahadevan ◽

William J. Sandborn ◽

De–Kun Li ◽

Shahbaz Hakimian ◽

Sunanda Kane ◽

...

Keyword(s):

Inflammatory Bowel Disease ◽

Bowel Disease ◽

Pregnancy Outcomes ◽

Northern California ◽

Community Based ◽

Large Community ◽

Inflammatory Bowel

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Effects of canine heartworm (Dirofilaria immitis) on body condition and activity of free-ranging coyotes (Canis latrans)

Canadian Journal of Zoology ◽

10.1139/z00-028 ◽

2000 ◽

Vol 78 (6) ◽

pp. 1042-1051 ◽

Cited By ~ 6

Author(s):

Benjamin N Sacks ◽

Karen M Blejwas

Keyword(s):

Body Mass ◽

Body Condition ◽

Dirofilaria Immitis ◽

Canis Latrans ◽

Infected Group ◽

Control Group ◽

Canine Heartworm ◽

Average Body Mass ◽

Free Ranging ◽

Average Body

We used radiotelemetry to study relationships among canine heartworm (Dirofilaria immitis) infection, body condition, and activity of free-ranging coyotes (Canis latrans). Average body mass at death was lower for 17 coyotes in a high-intensity infected group (mean = 33.6 heartworms) than for 18 coyotes in a control group (mean = 3.6 heartworms; p < 0.01). Coyotes in the infected group lost body mass at an average rate of 20% per year relative to the control group (p < 0.01). Bone marrow fat was negatively correlated with heartworm burden (R2 = 0.27; p < 0.01). Average body mass of coyotes at initial capture (i.e., potentially before infection) did not differ between infected and control groups (p = 0.90; 1β = 0.70). Activity was negatively correlated with heartworm burden during the last 2 months of life (R2 = 0.30; p < 0.01), but no correlation was found 24 months before death. Activity of the infected group (n = 13) declined over time (p = 0.01), whereas no difference in activity was observed in the control group (n = 13; p = 0.50). Our findings indicate that heartworm infection reduced body condition and activity of coyotes but that nutritional status did not significantly affect susceptibility to infection.

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