PubMed Health⌕ Search

Biomedical subjects

D J Forrester

Publications and source records attributed to D J Forrester.

At least 73 records · Page 4Linked to original sources
PubMed1977

An epizootic among knots (Calidris canutus) in Florida. I. Disease syndrome, histology and transmission studies.

About 150 knots found sick or dead had distention of serosal blood vessels, and small, raised hemorrhagic foci on the serosal surface of the jejunum and ileum. The principal finding was endaortitis with large intimal multinucleated cysts that contained a protozoan parasite within a cytoplasmic vacuole. There was endarteritis of mesenteric arteries and muscular arteries of the external layers of the intestinal tract. Single or multiple schizont-like stages containing zoites were in the wall of the small intestine and close to affected muscular arteries. The more usual intestinal lesion was an aneurysm of the inflamed muscular artery. It was concluded that endarteritis led to colonic infarction. Schizonts in medullary renal tubular cells were smaller than stages in the intestine. There was necrosis of epithelial cells of themedullary collecting ducts and inflammatory and regenerative changes. Schizonts and zoites were free in collecting ducts and ureters.

Animals↗
PubMed1977

An epizootic among knots (Calidris canutus) in Florida. II. Ultrastructure of the causative agent, a Besnoitia-like organism.

Multinucleated cysts near the luminal surface of the thoracic aortas of diseased knots (Calidris canutus) were similar to besnoitia cysts. Ultrastructurally, the cyst had four distinct layers. The central area included a vacuole that contained a sporozoan with a conoid, polar ring, micronemes, rhoptries, nucleus, mitochondria, dense bodies, a lipid-like vacuole and endoplasmic reticulum. External to the vacuole was a layer with organelles typical of vertebrate cells. The wall of the cyst was irregular in thickness and was bound by a strongly osmiophilic membrane. There was a loose, acellular area of intertwined strands between the cysts wall and layer of organelles.

Animals↗
PubMed1977

Blood parasites of some columbiform and passeriform birds from Chile.

Ninety-one birds of 23 species from Chile were examined for haematozoa; 13 birds of seven species harbored species of Haemoproteus, Leucocytozoon, Plasmodium, Trypanosoma and microfilariae. Haemoproteids (representing four species) were the most common parasites and occurred in 10 of the 13 infected birds.

Animals↗
PubMed1977

An epizootic of waterfowl associated with a red tide episode in Florida.

During February and March, 1974, an epizootic involving lesser scaup (Aythya affinis) occurred in the Tampa Bay area on the west coast of Florida. Several thousand ducks are estimated to have died. Concurrent with this epizootic was a red tide caused by heavy blooms of the toxic dinoflagellate Gymnodinium breve intoxication were evident in some of the lesser scaup. A controlled experimental feeding of G. breve toxic material to White Pekin ducklings produced illness and death with signs comparable to some of those seen in the scaup.

Animals↗
PubMed1977

Mosquito transmission of wild turkey malaria, Plasmodium hermani.

Culex nigripalpus experimentally transmitted Plasmodium hermani, a plasmodium of wild turkeys (Meleagris gallopavo) in Florida. The mosquitoes were infected by feeding upon blood induced parasitemias in domestic turkey poults. The resulting sporozoites, transmitted by either mosquito bites or injection, produced malaria infections in domestic poults.

Animals↗
PubMed1977

Status of the genus Cyrnea (Nematoda: Spiruroidea) in wild turkeys from the southeastern United States.

Two species of Cyrnea are reported from 706 wild turkeys (Meleagris gallopavo) from 25 localities in 9 southeastern states. Cyrnea (Cyrnea) neeli sp. n. in birds from Alabama and Florida is differentiated primarily by distal processes of the left spicule and spicule lengths. Specimens from wild turkeys previously reported as C. eurycerca are identified as C. coloni. The configuration of caudal papillae of C. colini is redescribed. Neither species occurred in birds from montainous regions, and C. neeli sp. n. was restricted to Florida and southern Alabama. Poults less than 1-month old were not infected. Infections peaked in early fall and then declined rapidly.

Animals↗
PubMed1976

Salmonella and Aspergillus infections in common loons overwintering in Florida.

During a 5-year period (1970-1975), 190 common loons (Gavia immer) from overwintering populations on the east and west coasts of Florida were examined for evidence of infectious diseases. Salmonella spp (representing 8 serotypes) were isolated from 27 (14%) of the loons, and lesions typical of those produced by Aspergillus fumigatus were found in 34 (18%) of the loons. Seven loons were infected with Salmonella spp and had lesions typical of aspergillus infection. The largest number of loons (124) was obtained during the winter of 1973-1974, in connection with an offshore oil spill. There was no significant difference between the isolation rates of Salmonella spp from oiled vs nonoiled loons, but the occurrence of aspergillosis was higher in nonoiled than in oiled loons.

Animals↗
PubMed1976

Influence of rainfall on lungworm infections in bighorn sheep.

From 1959 through 1968, lungs from 124 Rocky Mountain bighorn sheep (Ovis c. canadensis) from the Sun River herd in western Montana were examined for lungworm infections. All lungs were infected with Protostrongylus stilesi and 104 (84%) contained concurrent infections of P. stilesi and P. rushi. Significant correlations were observed between levels of lungworm infection and total rainfall during April, May, and June of each year. An explanation of this in terms of terrestrial snail (intermediate host) populations and a suggestion for the possible use of these data in developing a predictive model for forecasting lungworm levels for use in in bighorn sheep management are given.

Animals↗
PubMed1975

Avian pox in Florida sandhill cranes.

Cutaneous elevations were present on the feet, legs and heads of four Florida sandhill cranes, Grus canadensis pratensis, (one free-living, three penreared birds). As a result of examination of the elevations by light- and electron microscopy, it was determined that the lesions were caused by poxvirus. This is the first record of pox in cranes in North America.

Animals↗
PubMed1975

Intussusception in a Florida manatee.

An intussusception resulting from an embedded fishhook and a mass of nylon cord, monofilament line, and wire was determined to be the cause of death in a Florida manatee (Trichechus manatus latirostris). Pathologic findings are given along with information on bacteria (Edwardsiella tarda), pesticide residues (DDE, PCB's and dieldrin), and parasites (Chiorchis fabaceus).

Animals↗
PubMed1975

Reproductive performance of a laboratory colony of the deermouse, Peromyscus maniculatus gambelii.

During a 23-mo period approximately 600 litters and 2,500 offspring were produced in a laboratory colony established with wild-trapped deermice (Peromyscus maniculatus gambelii). The incidence of pregnancy and size of litters increased with domestication. Average litter size was 4.3 for all litters and 4.1 and 4.7 for litters born to wild-trapped and first generation females, respectively. Litter size increased up to the seventh sequential pregnancy for both wild-caught and first-generation females and then tapered off. In all litters more males were born than females. The departure from a 1:1 ratio was significant for the combined data and for litters of first-generation females, but not for litters of wild-caught females.

Animals↗
PubMed1975

Coccidia of sandhill cranes, Grus canadensis.

Eimeria gruis Yakinoff and Matschoulsky 1935, Eimeria reichenowi Yakimoff and Matschoulsky 1935, and an Adelina species are described from sandhill cranes in the United States. E. gruis was found in the feces of 11 of 14 Florida sandhill cranes (Grus canadensis pratensis) and 62 of 72 greater sandhill cranes (G. c. tabida) from Florida, 5 of 14 greater sandhill cranes from Arizona, and 4 of 16 lesser sandhill cranes (G. c. canadensis) from Texas. E. reichenowi was found in the feces of 12 of 14 Florida sandhill cranes and 66 of 72 greater sandhill cranes from Florida, 4 of 14 greater sandhill cranes from Arizona, and 5 of 16 lesser sandhill cranes from Texas. Adelina sp. was found in the feces of 3 of 14 Florida sandhill cranes and 2 of 72 greater sandhill cranes from Florida. The Adelina species is considered to be a spurious parasite of the cranes.

Animals↗