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Biomedical subjects

R W Guard

Publications and source records attributed to R W Guard.

10 recordsLinked to original sources

Aortitis with dissection complicating systemic lupus erythematosus.

A 31 yr old female under treatment for systemic lupus erythematosus complained of episodes of atypical chest pain radiating to the back. Subsequently she suddenly collapsed and died. Post mortem revealed a well-defined, localized area of non-giant cell aortitis extending from the supra-aortic ridge of the aortic valve to the ligamentum arteriosum. Active arteritis with fibrinoid necrosis and obliterative endarteritis of vasa vasorum had resulted in multiple infarcts of differing ages with associated inflammation and disruption of the aortic wall, culminating in aortic dissection and cardiac tamponade.

Adult↗

Dengue in the northern region of Queensland, 1981-1982.

During the dengue epidemic in northern Queensland in 1981 and 1982, type I dengue was serologically confirmed in 196 patients (mean age, 32.2 years) from the Cairns district. The most common symptoms were fever (99%), headache (92%), rash (91%), myalgia (93%), skin itching (75%) and arthralgia (60%). Haemorrhagic manifestations were noted in 14 patients. Most only showed skin petechiae. One patient also had bleeding from the gastrointestinal and urinary tracts. No cases of shock were recorded. Leucopenia was present in 57% of patients. A discussion on the relevance of these findings to dengue haemorrhagic fever/dengue shock syndrome is included. A serological survey after the epidemic suggests that approximately 7% of the population have antibodies to dengue as a result of the recent epidemic.

Adolescent↗

Melioidosis in Far North Queensland. A clinical and epidemiological review of twenty cases.

During the last 4 years, 20 cases of clinical melioidosis were diagnosed in the geographical area between Tully and Thursday Island. Sixteen were diagnosed by culture of Pseudomonas pseudomallei, and four by positive serology with appropriate clinical features. Most cases occurred during or after a heavy wet season. All patients were adult, and males predominated. Farmers and stockmen represented predisposed populations due to their prolonged soil contact. Ten patients were white Australians, six were Aborigines and four were Torres Strait Islanders. Twelve cases were first diagnosed by positive blood culture and four by sputum culture. The primary site of infection was pulmonary in 14 cases, genitourinary tract in one case, subcutaneous tissues in one case, and joints in two cases. In cases of fulminating infection metastatic abscesses were commonly found in many organs; typically lungs, liver, kidneys and spleen. Six patients had acute fulminating disease and died. Fourteen patients successfully responded to appropriate therapy, but relapse occurred in three, all of whom had an alcohol problem and showed poor drug compliance. The presence of diabetes mellitus in six patients confirmed the important known association of these two diseases. In three fulminating and four subacute infections the serology was negative at the time of diagnosis by culture. Antibiotic therapy for the different forms of this disease is reviewed, and a laboratory protocol for the rapid reporting of positive culture results is included.

Adult↗

The prevalence of human melioidosis in Northern Queensland.

Sera from 9,047 individuals from Northern Queensland were examined for the presence of hemagglutinating antibodies to Pseudomonas pseudomallei, the causative agent of melioidosis, and 512 (5.7%) were found to have titers of 1:40 or greater. The distribution of positive reactors in various groups was uneven, and significantly higher prevalences of positive antibody titers were found in the sera from Aborigines (7.9-10.6%), Torres Strait Islanders (7.8%), Vietnamese refugees (29%) and from persons with certain medical conditions including chronic alcoholism (15%), chronic infections (14.8%), diabetes mellitus (8.6%) and liver disease (12.9%). There were significantly fewer positive reactors (1.4%) amongst the armed forces stationed in Northern Queensland. At present, the boundaries of the major endemic region of Australia extend north from Rockhampton along the coast to Darwin and inland, west from Rockhampton to Tennant Creek in central Australia. Townsville was found to have the highest prevalence (5.2%) of positive reactors of all urban populations of Northern Queensland. The extent of the disease is such that it can no longer be considered a rare infection in Northern Queensland.

Alcoholism↗

A case of premature labour due to Campylobacter jejuni infection.

A case history is described in which premature labour was thought to have been caused by chorioamnionitis secondary to infection with Campylobacter jejuni. The pathogenicity of this organism in the perinatal period and in pregnancy is discussed. Campylobacter species are known to cause abortion and stillbirth in cattle and sheep. The present case report supports previous evidence that Campylobacter jejuni can cause infection in utero and perinatally in man, leading to abortion and preterm labour. Sporadic accounts of case histories similar to the present have appeared in the literature, but the incidence and epidemiology of this infection in obstetric patients is still unclear.

Adult↗

Haemorrhagic manifestations with Sindbis infection. Case report.

Sindbis infection in man occurs rarely in Australia. Most recorded cases are either asymptomatic or result in a fever sometimes accompanied by a macular or vesicular rash. This case is of particular interest because of the severe haemorrhagic vesicular rash and the repeated recurrence of symptoms over a 5 month period together with the persistence of IgM antibodies to Sindbis virus.

Child, Preschool↗

Epidemic polyarthritis in northeastern Australia, 1978-1979.

In a study of epidemic polyarthritis in central and northern Queensland, clinical disease was observed most frequently in urban-dwelling adult females. Clinical and subclinical infections were detected year round, although the majority of clinical infections occurred between the months of January and June. In the communities studied, there were approximately 50 subclinical infections for each clinical infection. There was no detectable association between any HLA-A or HLA-B phenotypes and epidemic polyarthritis.

Adolescent↗

Fulminating systemic infection caused by Vibrio cholerae species which does not agglutinate with 0-1 V. cholerae antiserum.

A case of fatal septicaemia caused by Vibrio cholerae which did not agglutinate with 0 group 1 V. cholerae antiserum is presented. The illness occurred in a 64-year-old Aboriginal woman from Aurukun Mission in Cape York. The organism was isolated from multiple blood cultures and urine during life, and froma a large hepatic abscess found post mortem. The pathogenicity and epidemiology of the organism is discussed.

Agglutination↗