Evaluation of infection control in registered tattooing premises in Victoria, 1994.

Tattooists at a random sample of registered tattooing premises were surveyed for self-reported compliance with infection-control practices specified in the Victorian Standards of practice for tattooing, and some were observed while tattooing. Of 35 respondents, 94 per cent reported that they believed their practice fully met the standards, yet 19 per cent of tattooists did not have a copy of the standards at their premises. Most believed the standards could be improved.

Impact of improved laboratory compliance on notification of genital Chlamydia trachomatis infection in Victoria.

Background And Objectives: Although regulations in Victoria require notification of chlamydia infection by both clinician and laboratory, review found many reports that were notified only by one source (i.e., were unmatched).

The Next Plague: Stigmatization and Discrimination Related to Hepatitis C Virus Infection in Australia.

A recently discovered hepatitis C virus is a common cause of chronic liver disease in industrialized countries. Because it is basically blood-borne and because blood donors are systematically screened, the only major group now at risk of infection are injecting drug users. There are increasing reports of stigmatization, affronts to dignity and discrimination as a result of the hepatitis C status of individuals, but little action is being taken to prevent or redress these.

Early interactions of hepatitis A virus with cultured cells: viral elution and the effect of pH and calcium ions.

Hepatitis A virus (HAV) is less well-characterized than other picornaviruses due to its slow and inefficient replication. In order to gain a greater understanding of HAV-receptor interactions we have used the recovery of cell-bound, infectious virus particles to measure the effects of temperature, pH and divalent cations on the binding of HAV to susceptible cells. Viral attachment to cultured cells proceeded at similar rates between 4 degrees C and 37 degrees C, with a slight increase in the total amount of virus attached at 4 degrees C.

Hepatitis A virus subviral particles: purification, accumulation, and relative infectivity of virions, provirions and procapsids.

Virus-specific particles were isolated from hepatitis A virus (HAV)-infected cells and the role of each particle type in the replicative cycle assessed. Mature virions, provirions (immature virions) and empty capsids (procapsids) were detected in cell lysates, and both virions and provirions were found in the culture supernatant. Particle types were separated by isopycnic caesium chloride gradient or linear sucrose density gradient-ultracentrifugation, and their capsid proteins characterised.

The public health aspects of complex emergencies and refugee situations.

Populations affected by armed conflict have experienced severe public health consequences mediated by population displacement, food scarcity, and the collapse of basic health services, giving rise to the term complex humanitarian emergencies. These public health effects have been most severe in underdeveloped countries in Africa, Asia, and Latin America. Refugees and internally displaced persons have experienced high mortality rates during the period immediately following their migration.

Zidovudine resistance is suppressed by mutations conferring resistance of human immunodeficiency virus type 1 to foscarnet.

Both foscarnet (PFA) and zidovudine (AZT) select for drug-resistant variants of human immunodeficiency virus type 1 (HIV-1), but the interactions between the mutations causing such resistance are unknown. The introduction of the previously identified PFA resistance mutation W to G at codon 88 (W88G), E89K, L92I, or Q161L into an HIV-1 strain having the four known AZT resistance mutations completely reversed high-level AZT resistance. Two additional PFA resistance mutations, W88S and S156A, partially suppressed AZT resistance.

Human immunodeficiency virus type 1 Nef binds directly to Lck and mitogen-activated protein kinase, inhibiting kinase activity.

It is now well established that human immunodeficiency virus type I (HIV-1) Nef contributes substantially to disease pathogenesis by augmenting virus replication and markedly perturbing T-cell function. The effect of Nef on host cell activation could be explained in part by its interaction with specific cellular proteins involved in signal transduction, including at least a member of the src family kinase, Lck, and the serine/threonine kinase, mitogen-activated protein kinase (MAPK). Recombinant Nef directly interacted with purified Lck and MAPK in coprecipitation experiments and binding assays.

A fourth Sp1 site in the human immunodeficiency virus type 1 long terminal repeat is essential for negative-sense transcription.

We report the discovery of a fourth Sp1 binding site at the 5' end of the U3 region of the human immunodeficiency virus type 1 (HIV-1) long terminal repeat (HIV-1 Sp1 IV), localized to HXB2 nucleotides -433 to -441. This site is shown to bind Sp1 protein specifically in electrophoretic mobility shift assays. Sp1 protein appears to bind to HIV-1 Spl IV with 5 to 10 times lower affinity than to a consensus Sp1 site.

Human immunodeficiency virus grown in CD4-expressing cells is associated with CD4.

Using a CD4-capture immunoassay for gp120, several strains of human immunodeficiency virus type 1 (HIV-1) grown in CD4-expressing T lymphoblastoid cells were found to contain little CD4-reactive gp120 (0.3-1.0 ng/ml) relative to virus titre (10(3.

Managing HIV. Part 8: Controlling an epidemic. 8.3 Prospects for a preventive HIV vaccine.

A safe vaccine to halt or slow the global HIV pandemic is urgently needed, yet the immediate prospects for an effective vaccine are poor. Experimental work to date suggests that live attenuated vaccines are most effective, but they raise serious safety concerns. The search for alternatives continues.

Quantifying phagocytosis of Mycobacterium avium complex by human monocytes in whole blood.

Studies of phagocytic efficiency in cells of the macrophage lineage have assumed additional importance since the discovery that HIV infection of these cells impairs their immune function. A rapid method has been developed for measuring phagocytosis of the opportunistic pathogen Mycobacterium avium complex by human monocytes. Fluoresceinated M.

The first hit: circumstances surrounding initiation into injecting.

Initiation into injecting is a crucial event for continued reproduction of an injecting drug using (IDU) population and for exposure to blood-borne viruses, but little is known about how this happens. Three hundred young injectors were interviewed in Melbourne by peer workers within the first few years of beginning to inject, about the circumstances surrounding their initiation. Most had indications of social disruption, including having left school early, unemployment, family disruption, homelessness and incarceration.

Surface CD4 is critical to in vitro HIV infection of human alveolar macrophages.

The CD4 glycoprotein is the major cellular receptor for HIV. CD4 surface expression of monocytes decreases with time in culture while their susceptibility to HIV-1 increases. Our aim was to investigate whether this phenomenon occurs in macrophages that have differentiated in vivo by investigating CD4 expression and HIV-1 infection of human alveolar macrophages (AMs).

Managing HIV. Part 6: People living with HIV. 6.7 Travellers with HIV.

Many HIV-infected people travel abroad, and although most can travel in relative safety there are a range of issues and risks to be considered by their medical advisers.

Hepatitis C transmission through tattooing: a case report.

We report the case of a prisoner for whom tattooing was the likely source of hepatitis C virus (HCV) infection. Many of the tattoos were carried out within prison using equipment that was multiply shared with other prisoners with limited access to means of disinfection. This case supports previous reports that prison is a risk factor for HCV infection and that HCV can be transmitted through tattooing.

Human immunodeficiency virus type 1 replication is blocked prior to reverse transcription and integration in freshly isolated peripheral blood monocytes.

Peripheral blood monocytes are resistant to productive human immunodeficiency virus type 1 (HIV-1) infection in vitro immediately after isolation. No viral cDNA (either early or late transcripts) was detected by PCR in monocytes exposed to virus on the day of isolation. In contrast, in monocytes cultured for as little as 1 day, initiated and completed reverse transcripts were readily detectable within 24 h of infection with both HIV-1(Ba-L) and primary isolates.

HIV in the mentally ill.

Objective: To review the published literature in relation to prevalence of HIV infection and risk behaviours for HIV among the mentally ill to assist in the development of appropriate strategies for public health policy, surveillance and clinical management of HIV and HIV risk in these groups.

Method: A search of published literature was carried out using 'Medline', in association with following up appropriate papers cited in the references of journals identified.

Results: The North American literature shows an increased risk of HIV infection in psychiatric patients receiving treatment in both inpatient or community settings.

A profile of HIV testing in Victoria to the end of 1993. Victorian Collaborative Group on HIV and AIDS Surveillance (VCGHAS).

Examination of testing patterns for human immunodeficiency virus (HIV) in a population is important because it affects interpretation of surveillance data on new HIV diagnoses and can guide the targeting and evaluation of campaigns to encourage appropriate antibody testing. This report describes a relatively inexpensive mechanism of collecting information on who is being tested for HIV in Victoria (other than at the Blood Bank). The annual number of HIV tests performed in Victoria increased steadily throughout the 1980s but the rate of increase slowed in the early 1990s.

The interaction of macrophage and non-macrophage tropic isolates of HIV-1 with thymic and tonsillar dendritic cells in vitro.

Dendritic cells isolated from thymus and tonsil were tested for susceptibility to HIV-1 strains that are tropic for macrophages or for T cell lines. DCs were purified by cell sorting and before infection expressed high levels of CD4 and HLA-DR and lacked markers for T, B, NK cells, or macrophages. Viral entry and reverse transcription was found after pulsing with strains of HIV-1 that could infect macrophages.

Managing HIV. Part 4: Primary therapy. 4.1 Antiretroviral therapies for HIV.

Zidovudine (AZT) is not the only drug with some effect on HIV. New agents and better-directed use of established agents can delay progression of the disease and prevent the onset of symptoms for some time.